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Document and Entity Information - shares	6 Months Ended
Document and Entity Information - shares	Jun. 30, 2012	Jul. 31, 2012
Document and Entity Information [Abstract]
Entity Registrant Name	M&T BANK CORP
Entity Central Index Key	0000036270
Document Type	10-Q
Document Period End Date	Jun. 30, 2012
Amendment Flag	false
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	Q2
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		126,686,762

Consolidated Balance Sheet (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2012	Dec. 31, 2011
Assets
Cash and due from banks	$ 1,421,831	$ 1,449,547
Interest-bearing deposits at banks	1,069,717	154,960
Federal funds sold	1,000	2,850
Trading account	544,938	561,834
Investment securities (includes pledged securities that can be sold or repledged of $x,xxx,xxx at June 30, 2012; $1,826,011 at December 31, 2011)
Available for sale (cost: $5,510,097 at June 30, 2012; $6,312,423 at December 31, 2011)	5,534,054	6,228,560
Held to maturity (fair value: $1,131,836 at June 30, 2012; $1,012,562 at December 31, 2011)	1,188,465	1,077,708
Other (fair value: $334,781 at June 30, 2012; $366,886 at December 31, 2011)	334,781	366,886
Total investment securities	7,057,300	7,673,154
Loans and leases	63,095,796	60,377,875
Unearned discount	(244,524)	(281,870)
Loans and leases, net of unearned discount	62,851,272	60,096,005
Allowance for credit losses	(917,028)	(908,290)
Loans and leases, net	61,934,244	59,187,715
Premises and equipment	592,498	581,435
Goodwill	3,524,625	3,524,625
Core deposit and other intangible assets	143,713	176,394
Accrued interest and other assets	4,517,712	4,611,773
Total assets	80,807,578	77,924,287
Liabilities
Noninterest-bearing deposits	22,854,794	20,017,883
NOW accounts	1,705,198	1,912,226
Savings deposits	32,292,412	31,001,083
Time deposits	5,330,239	6,107,530
Deposits at Cayman Islands office	366,164	355,927
Total deposits	62,548,807	59,394,649
Federal funds purchased and agreements to repurchase securities	975,575	732,059
Other short-term borrowings	0	50,023
Accrued interest and other liabilities	1,965,421	1,790,121
Long-term borrowings	5,687,868	6,686,226
Total liabilities	71,177,671	68,653,078
Shareholders' equity
Preferred stock, $1.00 par, 1,000,000 shares authorized; Issued and outstanding: Liquidation preference of $1,000 per share: 381,500 shares at June 30, 2012 and December 31, 2011;Liquidation preference of $10,000 per share: 50,000 shares at June 30, 2012 and December 31, 2011	868,433	864,585
Common stock, $.50 par, 250,000,000 shares authorized, 126,587,931 shares issued at June 30, 2012;125,683,398 shares issued at December 31, 2011	63,294	62,842
Common stock issuable, 57,231 shares at June 30, 2012; 68,220 shares at December 31, 2011	3,429	4,072
Additional paid-in capital	2,874,516	2,828,986
Retained earnings	6,098,084	5,867,165
Accumulated other comprehensive income (loss), net	(277,849)	(356,441)
Total shareholders' equity	9,629,907	9,271,209
Total liabilities and shareholders' equity	$ 80,807,578	$ 77,924,287

Consolidated Balance Sheet (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2012	Dec. 31, 2011
Consolidated Balance Sheet [Abstract]
Pledged securities that can be sold or repledged	$ 0	$ 1,826,011
Investment securities, available for sale, amortized cost	5,510,097	6,312,423
Investment securities, held to maturity, fair value	1,131,836	1,012,562
Other, fair value	$ 334,781	$ 366,886
Preferred stock, par value	$ 1.00	$ 1.00
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares issued	381,500	381,500
Preferred stock, shares outstanding	50,000	50,000
Preferred stock, liquidation preference per share	$ 1,000	$ 1,000
Liquidation preference, per share	10,000	10,000
Common stock, par value	$ 0.50	$ 0.50
Common stock, shares authorized	250,000,000	250,000,000
Common stock, shares issued	126,587,931	125,683,398
Common stock issuable, shares	57,231	68,220

Consolidated Statement of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Interest income
Loans and leases, including fees	$ 674,549	$ 624,247	$ 1,323,063	$ 1,218,279
Deposits at banks	767	479	980	515
Federal funds sold	8	10	11	28
Agreements to resell securities		127		128
Trading account	318	282	635	670
Investment securities
Fully taxable	59,724	60,827	122,688	131,489
Exempt from federal taxes	2,020	2,281	4,104	4,627
Total interest income	737,386	688,253	1,451,481	1,355,736
Interest expense
NOW accounts	424	274	707	476
Savings deposits	16,940	20,757	35,123	39,996
Time deposits	12,354	19,310	25,863	38,381
Deposits at Cayman Islands office	232	193	445	587
Short-term borrowings	348	147	651	639
Long-term borrowings	59,105	61,370	120,320	120,651
Total interest expense	89,403	102,051	183,109	200,730
Net interest income	647,983	586,202	1,268,372	1,155,006
Provision for credit losses	60,000	63,000	109,000	138,000
Net interest income after provision for credit losses	587,983	523,202	1,159,372	1,017,006
Other income
Mortgage banking revenues	69,514	42,151	125,706	87,307
Service charges on deposit accounts	110,982	119,716	219,871	229,447
Trust income	122,275	75,592	239,228	104,913
Brokerage services income	16,172	14,926	30,073	29,222
Trading account and foreign exchange gains	6,238	6,798	16,809	15,077
Gain (loss) on bank investment securities	(408)	110,744	(363)	150,097
Total other-than-temporary impairment ("OTTI") losses	(4,072)	(33,211)	(24,112)	(42,725)
Portion of OTTI losses recognized in other comprehensive income (before taxes)	(12,101)	6,681	(3,547)	154
Net OTTI losses recognized in earnings	(16,173)	(26,530)	(27,659)	(42,571)
Equity in earnings of Bayview Lending Group LLC	(6,635)	(5,223)	(11,387)	(11,901)
Other revenues from operations	89,685	163,482	176,095	254,485
Total other income	391,650	501,656	768,373	816,076
Other expense
Salaries and employee benefits	323,686	300,178	669,784	566,268
Equipment and net occupancy	65,376	59,670	130,419	116,333
Printing, postage and supplies	11,368	9,723	23,240	18,925
Amortization of core deposit and other intangible assets	15,907	14,740	32,681	27,054
FDIC assessments	24,962	26,609	53,911	45,703
Other costs of operations	186,093	165,975	357,052	302,183
Total other expense	627,392	576,895	1,267,087	1,076,466
Income before taxes	352,241	447,963	660,658	756,616
Income taxes	118,861	125,605	220,815	227,985
Net income	233,380	322,358	439,843	528,631
Net income available to common shareholders
Basic	214,709	297,164	402,947	487,283
Diluted	$ 214,716	$ 297,179	$ 402,958	$ 487,308
Net income per common share
Basic	$ 1.71	$ 2.43	$ 3.21	$ 4.04
Diluted	1.71	2.42	3.20	4.02
Cash dividends per common share	$ 0.70	$ 0.70	$ 1.40	$ 1.40
Average common shares outstanding
Basic	125,488	122,181	125,354	120,699
Diluted	125,897	122,796	125,756	121,332

Consolidated Statement of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Consolidated Statement of Comprehensive Income [Abstract]
Net income	$ 233,380	$ 322,358	$ 439,843	$ 528,631
Other comprehensive income, net of tax and reclassification adjustments:
Net unrealized gains (losses) on investment securities	49,289	(33,550)	69,371	(27,892)
Reclassification to income for amortization of gains on terminated cash flow hedges	(42)	(71)	(112)	(141)
Foreign currency translation adjustment	(533)	196	(131)	196
Defined benefit plans liability adjustment	4,695	2,177	9,464	4,288
Total other comprehensive income	53,409	(31,248)	78,592	(23,549)
Total comprehensive income	$ 286,789	$ 291,110	$ 518,435	$ 505,082

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

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+ Details

- Definition

Net of tax amount of other comprehensive income (loss) attributable to the parent entity.

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+ Details

- Definition

Net of tax amount of the income statement impact of the reclassification adjustment of accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges realized in net income. Also includes reclassification adjustments of an entity's share of an equity investee's deferred hedging gain (loss) realized in net income.

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+ Details

Consolidated Statement of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Cash flows from operating activities
Net income	$ 439,843	$ 528,631
Adjustments to reconcile net income to net cash provided by operating activities
Provision for credit losses	109,000	138,000
Depreciation and amortization of premises and equipment	41,762	38,370
Amortization of capitalized servicing rights	28,773	26,742
Amortization of core deposit and other intangible assets	32,681	27,054
Provision for deferred income taxes	12,064	(18,201)
Asset write-downs	39,676	48,032
Net gain on sales of assets	(3,786)	(181,318)
Net change in accrued interest receivable, payable	1,731	4,035
Net change in other accrued income and expense	(35,590)	23,766
Net change in loans originated for sale	(33,964)	167,857
Net change in trading account assets and liabilities	12,438	60,210
Net cash provided by operating activities	644,628	863,178
Cash flows from investing activities
Proceeds from sales of investment securities, Available for sale	48,873	1,909,223
Proceeds from sales of investment securities, Other	45,374	71,729
Proceeds from maturities of investment securities, Available for sale	741,571	751,314
Proceeds from maturities of investment securities, Held to maturity	157,849	114,913
Purchases of investment securities, Available for sale	(19,808)	(1,609,272)
Purchases of investment securities, Held to maturity	(269,854)	(13,151)
Purchase of investment securities, Other	(13,269)	(1,249)
Net increase in loans and leases	(2,805,640)	(454,782)
Net (increase) decrease in interest-bearing deposits at banks	(914,757)	432,037
Net increase in agreements to resell securities		(365,000)
Other investments, net	(5,436)	(10,249)
Capital expenditures, net	(46,892)	(13,976)
Acquisitions, net of cash acquired Banks and bank holding companies		178,940
Purchase of Wilmington Trust Corporation preferred stock		(330,000)
Proceeds from the sales of real estate acquired in settlement of loans	64,735	161,514
Other, net	(38,849)	18,322
Net cash used by investing activities	(3,056,103)	840,313
Cash flows from financing activities
Net increase in deposits	3,162,352	566,316
Net increase (decrease) in short-term borrowings	193,515	(528,035)
Payments on long-term borrowings	(1,006,539)	(1,331,316)
Proceeds from issuance of preferred stock		495,000
Redemption of preferred stock		(370,000)
Dividends paid - common	(179,446)	(173,135)
Dividends paid - preferred	(26,725)	(20,046)
Other, net	238,752	56,885
Net cash provided (used) by financing activities	2,381,909	(1,304,331)
Net increase (decrease) in cash and cash equivalents	(29,566)	399,160
Cash and cash equivalents at beginning of period	1,452,397	933,755
Cash and cash equivalents at end of period	1,422,831	1,332,915
Supplemental disclosure of cash flow information
Interest received during the period	1,457,310	1,366,981
Interest paid during the period	192,666	205,514
Income taxes paid during the period	204,249	266,240
Supplemental schedule of noncash investing and financing activities
Real estate acquired in settlement of loans	$ 26,623	45,774
Acquisitions: Fair value of:
Assets acquired (noncash)		10,666,102
Liabilities assumed		10,044,555
Common stock issued		405,557
Retirement of Wilmington Trust Corporation preferred stock		$ 330,000

Consolidated Statement of Changes in Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Preferred stock	Common stock	Common stock issuable	Additional paid-in capital	Retained earnings	Accumulated other comprehensive income (loss), net	Treasury stock
Beginning Balance at Dec. 31, 2010	$ 8,357,695	$ 740,657	$ 60,198	$ 4,189	$ 2,398,615	$ 5,426,701	$ (205,220)	$ (67,445)
Total comprehensive income	505,082					528,631	(23,549)
Acquisition of Wilmington Trust Corporation - common stock issued	405,557		2,348		403,209
Partial redemption of Series A preferred stock	(370,000)	(370,000)
Conversion of Series B preferred stock into 433,144 shares of common stock		(26,500)	192		21,754			4,554
Issuance of Series D preferred stock	495,000	500,000			(5,000)
Preferred stock cash dividends	(20,046)					(20,046)
Amortization of preferred stock discount		16,744				(16,744)
Stock-based compensation plans:
Compensation expense, net	21,311		27		(10,382)			31,666
Exercises of stock options, net	21,170		12		(8,948)			30,106
Directors' stock plan	563				(49)			612
Deferred compensation plans, net, including dividend equivalents	35			(159)	(219)	(94)		507
Other	1,022				1,022
Common stock cash dividends - $1.40 per share	(173,195)					(173,195)
Ending Balance at Jun. 30, 2011	9,244,194	860,901	62,777	4,030	2,800,002	5,745,253	(228,769)
Beginning Balance at Dec. 31, 2011	9,271,209	864,585	62,842	4,072	2,828,986	5,867,165	(356,441)
Total comprehensive income	518,435					439,843	78,592
Preferred stock cash dividends	(26,725)					(26,725)
Amortization of preferred stock discount		3,848				(3,848)
Stock-based compensation plans:
Compensation expense, net	18,505		216		18,289
Exercises of stock options, net	25,139		227		24,912
Directors' stock plan	768		4		764
Deferred compensation plans, net, including dividend equivalents	(169)		5	(643)	549	(80)
Other	1,016				1,016
Common stock cash dividends - $1.40 per share	(178,271)					(178,271)
Ending Balance at Jun. 30, 2012	$ 9,629,907	$ 868,433	$ 63,294	$ 3,429	$ 2,874,516	$ 6,098,084	$ (277,849)

Consolidated Statement of Changes in Stockholders' Equity (Unaudited) (Parenthetical) - $ / shares shares in Thousands	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Common stock per share dividend amount	$ 1.40	$ 1.40
Preferred stock
Shares of common stock issued upon conversion of Series B preferred stock		433,144
Common stock
Shares of common stock issued upon conversion of Series B preferred stock		433,144
Additional paid-in capital
Shares of common stock issued upon conversion of Series B preferred stock		433,144
Retained earnings
Common stock per share dividend amount	$ 1.40	$ 1.40
Treasury stock
Shares of common stock issued upon conversion of Series B preferred stock		433,144

- Definition

Number of shares issued during the period as a result of the conversion of convertible securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=6959260&loc=d3e187085-122770

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.29-30)
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Article 3

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 29, 30
-Article 5

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 129
-Paragraph 4, 5
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Principles Board Opinion (APB)
-Number 12
-Paragraph 10
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Significant accounting policies

6 Months Ended

Jun. 30, 2012

Significant accounting policies [Abstract]

Significant accounting policies

1.	Significant accounting policies

The consolidated financial statements of M&T Bank Corporation (“M&T”) and subsidiaries (“the Company”) were compiled in accordance with generally accepted accounting principles (“GAAP”) using the accounting policies set forth in note 1 of Notes to Financial Statements included in the 2011 Annual Report. In the opinion of management, all adjustments necessary for a fair presentation have been made and were all of a normal recurring nature.

Acquisitions

6 Months Ended

Jun. 30, 2012

Acquisitions [Abstract]

Acquisitions

2.	Acquisitions

On May 16, 2011, M&T acquired all of the outstanding common stock of Wilmington Trust Corporation (“Wilmington Trust”), headquartered in Wilmington, Delaware, in a stock-for-stock transaction. Wilmington Trust operated 55 banking offices in Delaware and Pennsylvania at the date of acquisition. The results of operations acquired in the Wilmington Trust transaction have been included in the Company’s financial results since May 16, 2011. Wilmington Trust shareholders received .051372 shares of M&T common stock in exchange for each share of Wilmington Trust common stock, resulting in M&T issuing a total of 4,694,486 common shares with an acquisition date fair value of $406 million.

The Wilmington Trust transaction has been accounted for using the acquisition method of accounting and, accordingly, assets acquired, liabilities assumed and consideration exchanged were recorded at estimated fair value on the acquisition date. Assets acquired totaled approximately $10.8 billion, including $6.4 billion of loans and leases (including approximately $3.2 billion of commercial real estate loans, $1.4 billion of commercial loans and leases, $1.1 billion of consumer loans and $680 million of residential real estate loans). Liabilities assumed aggregated $10.0 billion, including $8.9 billion of deposits. The common stock issued in the transaction added $406 million to M&T’s common shareholders’ equity. Immediately prior to the closing of the Wilmington Trust transaction, M&T redeemed the $330 million of preferred stock issued by Wilmington Trust as part of the Troubled Asset Relief Program – Capital Purchase Program of the U.S. Department of Treasury (“U.S. Treasury”). In connection with the acquisition, the Company recorded $112 million of core deposit and other intangible assets. The core deposit and other intangible assets are generally being amortized over periods of 5 to 7 years using an accelerated method. There was no goodwill recorded as a result of the transaction, however, a non-taxable gain of $65 million was realized, which represented the excess of the fair value of assets acquired less liabilities assumed over consideration exchanged. The acquisition of Wilmington Trust added to M&T’s market-leading position in the Mid-Atlantic region by giving M&T a leading deposit market share in Delaware.

The consideration paid for Wilmington Trust’s common equity and the amounts of acquired identifiable assets and liabilities assumed as of the acquisition date were as follows:


	(in thousands)
Purchase price:
Value of:
Common shares issued (4,694,486 shares)	$	405,557
Preferred stock purchased from U.S. Treasury		330,000

Total purchase price		735,557

Identifiable assets:
Cash and due from banks		178,940
Interest-bearing deposits at banks		2,606,265
Other short-term investments		57,817
Investment securities		510,390
Loans and leases		6,410,430
Core deposit and other intangibles		112,094
Other assets		969,106

Total identifiable assets		10,845,042

Liabilities:
Deposits		8,864,161
Short-term borrowings		147,752
Long-term borrowings		600,830
Other liabilities		431,812

Total liabilities		10,044,555

Net gain resulting from acquisition	$	64,930

The following table presents certain pro forma information as if Wilmington Trust had been included in the Company’s results of operations for the three months and six months ended June 30, 2011 rather than since the acquisition date on May 16, 2011. These results combine the historical results of Wilmington Trust into the Company’s consolidated statement of income and, while certain adjustments were made for the estimated impact of certain fair valuation adjustments and other acquisition-related activity, they are not indicative of what would have occurred had the acquisition taken place as indicated. In particular, no adjustments have been made to eliminate the amount of Wilmington Trust’s provision for credit losses of $41 million or the impact of other-than-temporary impairment losses of $5 million recognized by Wilmington Trust during the first quarter of 2011 that may not have been necessary had the acquired loans and investment securities been recorded at fair value as of the beginning of 2011. Additionally, the Company expects to achieve operating cost savings and other business synergies as a result of the acquisition which are not reflected in the pro forma amounts that follow.


	Pro forma Three months ended June 30, 2011		Pro forma Six months ended June 30, 2011
	(in thousands)
Total revenues (a)	$	1,166,694		2,208,188
Net income		309,527		480,948

(a)

Represents net interest income plus other income.

In connection with the acquisition, the Company incurred merger-related expenses related to systems conversions and other costs of integrating and conforming acquired operations with and into the Company. Those expenses consisted largely of professional services and other temporary help fees associated with systems conversions and/or integration of operations; costs related to termination of existing contractual arrangements of Wilmington Trust to purchase various services; initial marketing and promotion expenses designed to introduce M&T Bank to its new customers; severance for former employees; travel costs; and printing, postage, supplies and other costs of completing the transaction and commencing operations in new markets and offices. The Company does not expect to incur any significant additional merger-related expenses during the remainder of 2012.

A summary of merger-related expenses included in the consolidated statement of income follows:


	Three months ended				Six months ended
	June 30, 2012		June 30, 2011		June 30, 2012		June 30, 2011
	(in thousands)
Salaries and employee benefits	$	3,024		15,305		4,997		15,312
Equipment and net occupancy		—		25		15		104
Printing, postage and supplies		—		318		—		465
Other costs of operations		4,127		21,348		4,867		25,410

	$	7,151		36,996		9,879		41,291

- Definition

The entire disclosure for a business combination (or series of individually immaterial business combinations) completed during the period, including background, timing, and recognized assets and liabilities. The disclosure may include leverage buyout transactions (as applicable).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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Reference 5: http://www.xbrl.org/2003/role/presentationRef
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Reference 6: http://www.xbrl.org/2003/role/presentationRef
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Reference 7: http://www.xbrl.org/2003/role/presentationRef
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-URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4845-128472

Reference 8: http://www.xbrl.org/2003/role/presentationRef
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Reference 9: http://www.xbrl.org/2003/role/presentationRef
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Reference 13: http://www.xbrl.org/2003/role/presentationRef
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Reference 14: http://www.xbrl.org/2003/role/presentationRef
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Reference 15: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 16: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number 88-16
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 17: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph F4
-Subparagraph e
-Appendix F

Reference 18: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141
-Paragraph 51, 52
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 19: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph 67-73
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Investment securities

6 Months Ended

Jun. 30, 2012

Investment securities [Abstract]

Investment securities

3.	Investment securities

The amortized cost and estimated fair value of investment securities were as follows:


	Amortized cost		Gross unrealized gains		Gross unrealized losses		Estimated fair value
	(in thousands)
June 30, 2012
Investment securities available for sale:
U.S. Treasury and federal agencies	$	55,484		1,115		—	$	56,599
Obligations of states and political subdivisions		34,007		569		8		34,568
Mortgage-backed securities:
Government issued or guaranteed		3,840,610		218,117		227		4,058,500
Privately issued residential		1,252,709		5,254		189,571		1,068,392
Privately issued commercial		13,048		—		921		12,127
Collateralized debt obligations		43,749		13,079		1,730		55,098
Other debt securities		158,153		2,034		31,258		128,929
Equity securities		112,337		10,926		3,422		119,841

		5,510,097		251,094		227,137		5,534,054

Investment securities held to maturity:
Obligations of states and political subdivisions		187,936		8,375		30		196,281
Mortgage-backed securities:
Government issued or guaranteed		733,912		31,929		—		765,841
Privately issued		255,291		317		97,220		158,388
Other debt securities		11,326		—		—		11,326

		1,188,465		40,621		97,250		1,131,836

Other securities		334,781		—		—		334,781

Total	$	7,033,343		291,715		324,387	$	7,000,671

December 31, 2011
Investment securities available for sale:
U.S. Treasury and federal agencies	$	69,468		1,255		—	$	70,723
Obligations of states and political subdivisions		39,518		771		20		40,269
Mortgage-backed securities:
Government issued or guaranteed		4,344,116		177,392		275		4,521,233
Privately issued residential		1,369,371		6,373		239,488		1,136,256
Privately issued commercial		17,679		—		2,650		15,029
Collateralized debt obligations		43,834		11,154		2,488		52,500
Other debt securities		216,700		4,588		44,443		176,845
Equity securities		211,737		8,468		4,500		215,705

		6,312,423		210,001		293,864		6,228,560

Investment securities held to maturity:
Obligations of states and political subdivisions		188,680		9,141		28		197,793
Mortgage-backed securities:
Government issued or guaranteed		608,533		24,881		—		633,414
Privately issued		268,642		—		99,140		169,502
Other debt securities		11,853		—		—		11,853

		1,077,708		34,022		99,168		1,012,562

Other securities		366,886		—		—		366,886

Total	$	7,757,017		244,023		393,032	$	7,608,008

Gross realized gains on investment securities were $111 million and $150 million for the three-month and six-month periods ended June 30, 2011. Gross realized gains were not significant in 2012. Gross realized losses on investment securities were not significant during the three-month and six-month periods ended June 30, 2012 or 2011. During the second quarter of 2011, the Company sold residential mortgage-backed securities guaranteed by the Federal National Mortgage Association (“Fannie Mae”) and the Federal Home Loan Mortgage Corporation (“Freddie Mac”) having an aggregate amortized cost of approximately $1.0 billion which resulted in a gain of $66 million (pre-tax). The Company also sold trust preferred securities and collateralized debt obligations during the second quarter of 2011 having an aggregate amortized cost of $136 million and $100 million, respectively, which resulted in gains of $25 million (pre-tax) and $20 million (pre-tax), respectively. During the first quarter of 2011, the Company sold residential mortgage-backed securities guaranteed by Fannie Mae and Freddie Mac having an aggregate amortized cost of approximately $484 million which resulted in a gain of $39 million (pre-tax).

The Company recognized pre-tax other-than-temporary impairment losses of $16 million and $28 million during the three months and six months ended June 30, 2012, respectively, and $27 million and $43 million during the three months and six months ended June 30, 2011, respectively, related to privately issued mortgage-backed securities. The impairment charges were recognized in light of deterioration of real estate values and a rise in delinquencies and charge-offs of underlying mortgage loans collateralizing those securities. The other-than-temporary losses represent management’s estimate of credit losses inherent in the debt securities considering projected cash flows using assumptions of delinquency rates, loss severities, and other estimates for future collateral performance.

The following table displays changes in credit losses associated with debt securities for which other-than-temporary impairment losses have been previously recognized in earnings for the three months and six months ended June 30, 2012 and 2011:


	Three months ended June 30
	2012			2011
	(in thousands)
Beginning balance	$	267,473			322,719
Additions for credit losses not previously recognized		16,173			26,530
Reductions for increases in cash flows		—			(4,881	)
Reductions for realized losses		(19,449	)		(46,227	)

Ending balance	$	264,197			298,141


	Six months ended June 30
	2012			2011
	(in thousands)
Beginning balance	$	285,399			327,912
Additions for credit losses not previously recognized		27,659			42,571
Reductions for increases in cash flows		—			(5,020	)
Reductions for realized losses		(48,861	)		(67,322	)

Ending balance	$	264,197			298,141

At June 30, 2012, the amortized cost and estimated fair value of debt securities by contractual maturity were as follows:


	Amortized cost		Estimated fair value
	(in thousands)
Debt securities available for sale:
Due in one year or less	$	33,314		33,367
Due after one year through five years		40,715		42,082
Due after five years through ten years		11,098		11,886
Due after ten years		206,266		187,859

		291,393		275,194
Mortgage-backed securities available for sale		5,106,367		5,139,019

	$	5,397,760		5,414,213

Debt securities held to maturity:
Due in one year or less	$	30,983		31,166
Due after one year through five years		40,576		42,599
Due after five years through ten years		114,797		120,839
Due after ten years		12,906		13,003

		199,262		207,607
Mortgage-backed securities held to maturity		989,203		924,229

	$	1,188,465		1,131,836

A summary of investment securities that as of June 30, 2012 and December 31, 2011 had been in a continuous unrealized loss position for less than twelve months and those that had been in a continuous unrealized loss position for twelve months or longer follows:


	Less than 12 months					12 months or more
	Fair value		Unrealized losses			Fair value		Unrealized losses
	(in thousands)
June 30, 2012
Investment securities available for sale:
Obligations of states and political subdivisions	$	171		(1	)		678		(7	)
Mortgage-backed securities:
Government issued or guaranteed		15,936		(70	)		9,951		(157	)
Privately issued residential		126,139		(1,861	)		841,748		(187,710	)
Privately issued commercial		—		—			12,127		(921	)
Collateralized debt obligations		3,106		(39	)		5,349		(1,691	)
Other debt securities		16,858		(2,053	)		74,206		(29,205	)
Equity securities		8,118		(1,389	)		2,193		(2,033	)

		170,328		(5,413	)		946,252		(221,724	)

Investment securities held to maturity:
Obligations of states and political subdivisions		5,598		(23	)		169		(7	)
Privately issued mortgage-backed securities		—		—			157,659		(97,220	)

		5,598		(23	)		157,828		(97,227	)

Total	$	175,926		(5,436	)		1,104,080		(318,951	)

December 31, 2011
Investment securities available for sale:
Obligations of states and political subdivisions	$	—		—			1,228		(20	)
Mortgage-backed securities:
Government issued or guaranteed		38,492		(190	)		6,017		(85	)
Privately issued residential		297,133		(14,188	)		751,077		(225,300	)
Privately issued commercial		—		—			15,029		(2,650	)
Collateralized debt obligations		2,871		(335	)		4,863		(2,153	)
Other debt securities		72,637		(9,883	)		73,635		(34,560	)
Equity securities		9,883		(4,500	)		—		—

		421,016		(29,096	)		851,849		(264,768	)

Investment securities held to maturity:
Obligations of states and political subdivisions		3,084		(4	)		1,430		(24	)
Privately issued mortgage-backed securities		1,883		(592	)		167,139		(98,548	)

		4,967		(596	)		168,569		(98,572	)

Total	$	425,983		(29,692	)		1,020,418		(363,340	)

The Company owned 290 individual investment securities with aggregate gross unrealized losses of $324 million at June 30, 2012. Approximately $288 million of the unrealized losses pertained to privately issued mortgage-backed securities with a cost basis of $1.4 billion. The Company also had $33 million of unrealized losses on trust preferred securities issued by financial institutions, securities backed by trust preferred securities issued by financial institutions and other entities, and other debt securities having a cost basis of $133 million. Based on a review of each of the remaining securities in the investment securities portfolio at June 30, 2012, with the exception of the aforementioned securities for which other-than-temporary impairment losses were recognized, the Company concluded that it expected to recover the amortized cost basis of its investment. As of June 30, 2012, the Company does not intend to sell nor is it anticipated that it would be required to sell any of its impaired investment securities. At June 30, 2012, the Company has not identified events or changes in circumstances which may have a significant adverse effect on the fair value of the $335 million of cost method investment securities.

- Definition

The entire disclosure for investments in certain debt and equity securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-Glossary Debt Security
-URI http://asc.fasb.org/extlink&oid=6509901

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 3, 19, 20, 21, 22, 137
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Loans and leases and the allowance for credit losses

6 Months Ended

Jun. 30, 2012

Loans and leases and the allowance for credit losses [Abstract]

Loans and leases and the allowance for credit losses

4.	Loans and leases and the allowance for credit losses

The outstanding principal balance and the carrying amount of acquired loans that were recorded at fair value at the acquisition date that is included in the consolidated balance sheet is as follows:


	June 30, 2012		December 31, 2011
	(in thousands)
Outstanding principal balance	$	8,097,216		9,203,366
Carrying amount:
Commercial, financial, leasing, etc.		1,216,711		1,331,198
Commercial real estate		3,222,688		3,879,518
Residential real estate		814,288		915,371
Consumer		1,834,751		2,033,700

	$	7,088,438		8,159,787

Purchased impaired loans included in the table above totaled $561 million at June 30, 2012 and $653 million at December 31, 2011, representing less than 1% of the Company’s assets as of each date.

Interest income on acquired loans that were recorded at fair value at the acquisition date was $90 million and $171 million for the three months and six months ended June 30, 2012 and $69 million and $110 million for the three months and six months ended June 30, 2011, respectively. Reflecting an improvement in estimated cash flows on acquired loans, the Company transferred $140 million from nonaccretable balance to accretable yield during the quarter ended June 30, 2012. At December 31, 2010 and June 30, 2011, the accretable yield on acquired loans was $457 million and $1.04 billion, respectively. A summary of changes in the accretable yield for acquired loans for the three months and six months ended June 30, 2012 follows:


	Three months ended June 30, 2012
	Purchased impaired			Other acquired			Total
	(in thousands)
Balance at beginning of period	$	22,565			747,466			770,031
Interest income		(9,621	)		(80,249	)		(89,870	)
Reclassifications from (to) nonaccretable balance, net		42,655			97,165			139,820
Other (a)		—			(31,221	)		(31,221	)

Balance at end of period	$	55,599			733,161			788,760


	Six months ended June 30, 2012
	Purchased impaired			Other acquired			Total
	(in thousands)
Balance at beginning of period	$	30,805			807,960			838,765
Interest income		(17,285	)		(153,972	)		(171,257	)
Reclassifications from (to) nonaccretable balance, net		42,079			98,165			140,244
Other (a)		—			(18,992	)		(18,992	)

Balance at end of period	$	55,599			733,161			788,760

(a)

Other changes in expected cash flows including changes in interest rates and prepayments.

A summary of current, past due and nonaccrual loans as of June 30, 2012 and December 31, 2011 were as follows:


	Current		30-89 Days past due		90 Days or more past due and accruing				Purchased impaired (b)		Nonaccrual		Total
	Current		30-89 Days past due		Non- acquired		Acquired (a)		Purchased impaired (b)		Nonaccrual		Total
	(in thousands)
June 30, 2012
Commercial, financial, leasing, etc.	$	16,138,169		73,581		1,455		12,402		16,424		153,556		16,395,587
Real estate:
Commercial		20,854,618		128,489		10,128		49,038		164,855		173,278		21,380,406
Residential builder and developer		761,655		47,065		2,213		18,330		264,163		240,248		1,333,674
Other commercial construction		2,051,194		16,174		4,352		23,158		63,446		26,303		2,184,627
Residential		8,563,870		252,076		251,750		41,047		47,135		174,937		9,330,815
Residential Alt-A		355,574		24,221		—		—		—		100,915		480,710
Consumer:
Home equity lines and loans		6,384,785		41,795		—		15,263		4,381		54,509		6,500,733
Automobile		2,490,590		34,961		—		261		—		24,482		2,550,294
Other		2,628,257		38,085		4,700		2,988		296		20,100		2,694,426

Total	$	60,228,712		656,447		274,598		162,487		560,700		968,328		62,851,272


	Current		30-89 Days past due		90 Days or more past due and accruing				Purchased impaired (b)		Nonaccrual		Total
	Current		30-89 Days past due		Non- acquired		Acquired (a)		Purchased impaired (b)		Nonaccrual		Total
December 31, 2011
Commercial, financial, leasing, etc.	$	15,493,803		37,112		7,601		8,560		23,762		163,598		15,734,436
Real estate:
Commercial		19,658,761		172,641		9,983		54,148		192,804		171,111		20,259,448
Residential builder and developer		845,680		49,353		13,603		21,116		297,005		281,576		1,508,333
Other commercial construction		2,393,304		41,049		968		23,582		78,105		106,325		2,643,333
Residential		6,626,182		256,017		250,472		37,982		56,741		172,681		7,400,075
Residential Alt-A		383,834		34,077		—		—		—		105,179		523,090
Consumer:
Home equity lines and loans		6,570,675		43,516		—		15,409		4,635		47,150		6,681,385
Automobile		2,644,330		48,342		—		601		—		26,835		2,720,108
Other		2,551,225		43,547		5,249		2,340		310		23,126		2,625,797

Total	$	57,167,794		725,654		287,876		163,738		653,362		1,097,581		60,096,005

(a)

Acquired loans that were recorded at fair value at acquisition date. This category does not include purchased impaired loans that are presented separately.

(b)

Accruing loans that were impaired at acquisition date and were recorded at fair value.

Changes in the allowance for credit losses for the three months ended June 30, 2012 were as follows:


	Commercial, Financial, Leasing, etc.			Real Estate
	Commercial, Financial, Leasing, etc.			Commercial			Residential			Consumer			Unallocated		Total
	(in thousands)
Beginning balance	$	239,273			356,554			97,301			142,912			72,966		909,006
Provision for credit losses		19,103			(3,309	)		5,587			38,427			192		60,000
Net charge-offs
Charge-offs		(16,078	)		(13,056	)		(11,407	)		(23,621	)		—		(64,162	)
Recoveries		2,430			1,332			1,788			6,634			—		12,184

Net charge-offs		(13,648	)		(11,724	)		(9,619	)		(16,987	)		—		(51,978	)

Ending balance	$	244,728			341,521			93,269			164,352			73,158		917,028

Changes in the allowance for credit losses for the three months ended June 30, 2011 were as follows:


	Commercial, Financial, Leasing, etc.			Real Estate
	Commercial, Financial, Leasing, etc.			Commercial			Residential			Consumer			Unallocated			Total
	(in thousands)
Beginning balance	$	215,659			391,107			87,526			137,351			72,060			903,703
Provision for credit losses		6,870			22,735			13,654			19,852			(111	)		63,000
Net charge-offs
Charge-offs		(14,923	)		(15,915	)		(15,872	)		(24,940	)		—			(71,650	)
Recoveries		2,273			3,184			2,033			5,046			—			12,536

Net charge-offs		(12,650	)		(12,731	)		(13,839	)		(19,894	)		—			(59,114	)

Ending balance	$	209,879			401,111			87,341			137,309			71,949			907,589

Changes in the allowance for credit losses for the six months ended June 30, 2012 were as follows:


	Commercial, Financial, Leasing, etc.			Real Estate
	Commercial, Financial, Leasing, etc.			Commercial			Residential			Consumer			Unallocated		Total
	(in thousands)
Beginning balance	$	234,022			367,637			91,915			143,121			71,595		908,290
Provision for credit losses		29,224			(5,569	)		21,817			61,965			1,563		109,000
Net charge-offs
Charge-offs		(24,115	)		(23,596	)		(24,125	)		(52,602	)		—		(124,438	)
Recoveries		5,597			3,049			3,662			11,868			—		24,176

Net charge-offs		(18,518	)		(20,547	)		(20,463	)		(40,734	)		—		(100,262	)

Ending balance	$	244,728			341,521			93,269			164,352			73,158		917,028

Changes in the allowance for credit losses for the six months ended June 30, 2011 were as follows:


	Commercial, Financial, Leasing, etc.			Real Estate
	Commercial, Financial, Leasing, etc.			Commercial			Residential			Consumer			Unallocated		Total
	(in thousands)
Beginning balance	$	212,579			400,562			86,351			133,067			70,382		902,941
Provision for credit losses		21,812			37,510			29,495			47,616			1,567		138,000
Net charge-offs
Charge-offs		(28,950	)		(40,494	)		(32,039	)		(53,261	)		—		(154,744	)
Recoveries		4,438			3,533			3,534			9,887			—		21,392

Net charge-offs		(24,512	)		(36,961	)		(28,505	)		(43,374	)		—		(133,352	)

Ending balance	$	209,879			401,111			87,341			137,309			71,949		907,589

Despite the above allocation, the allowance for credit losses is general in nature and is available to absorb losses from any portfolio segment.

In establishing the allowance for credit losses, the Company estimates losses attributable to specific troubled credits identified through both normal and detailed or intensified credit review processes and also estimates losses inherent in other loans and leases on a collective basis. For purposes of determining the level of the allowance for credit losses, the Company evaluates its loan and lease portfolio by loan type. The amounts of loss components in the Company’s loan and lease portfolios are determined through a loan by loan analysis of larger balance commercial and commercial real estate loans that are in nonaccrual status and by applying loss factors to groups of loan balances based on loan type and management’s classification of such loans under the Company’s loan grading system. Measurement of the specific loss components is typically based on expected future cash flows, collateral values and other factors that may impact the borrower’s ability to pay. In determining the allowance for credit losses, the Company utilizes an extensive loan grading system which is applied to all commercial and commercial real estate credits on an individual loan basis. Loan officers are responsible for continually assigning grades to these loans based on standards outlined in the Company’s Credit Policy. Internal loan grades are also monitored by the Company’s loan review department to ensure consistency and strict adherence to the prescribed standards. Loan grades are assigned loss component factors that reflect the Company’s loss estimate for each group of loans and leases. Factors considered in assigning loan grades and loss component factors include borrower-specific information related to expected future cash flows and operating results, collateral values, geographic location, financial condition and performance, payment status, and other information; levels of and trends in portfolio charge-offs and recoveries; levels of and trends in portfolio delinquencies and impaired loans; changes in the risk profile of specific portfolios; trends in volume and terms of loans; effects of changes in credit concentrations; and observed trends and practices in the banking industry. As updated appraisals are obtained on individual loans or other events in the market place indicate that collateral values have significantly changed, individual loan grades are adjusted as appropriate. Changes in other factors cited may also lead to loan grade changes at anytime. Except for consumer and residential mortgage loans that are considered smaller balance homogenous loans and acquired loans that are evaluated on an aggregated basis, the Company considers a loan to be impaired for purposes of applying GAAP when, based on current information and events, it is probable that the Company will be unable to collect all amounts according to the contractual terms of the loan agreement or the loan is delinquent 90 days. Regardless of loan type, the Company considers a loan to be impaired if it qualifies as a troubled debt restructuring. Modified loans, including smaller balance homogenous loans, that are considered to be troubled debt restructurings are evaluated for impairment giving consideration to the impact of the modified loan terms on the present value of the loan’s expected cash flows.

The following tables provide information with respect to impaired loans and leases as of June 30, 2012 and December 31, 2011 and for the three months and six months ended June 30, 2012 and June 30, 2011:


	June 30, 2012						December 31, 2011
	Recorded investment		Unpaid principal balance		Related allowance		Recorded investment		Unpaid principal balance		Related allowance
	(in thousands)
With an allowance recorded:
Commercial, financial, leasing, etc.	$	118,670		139,477		39,134		118,538		145,510		48,674
Real estate:
Commercial		116,765		148,232		19,323		102,886		128,456		17,651
Residential builder and developer		135,172		243,663		33,490		159,293		280,869		52,562
Other commercial construction		81,077		89,410		12,404		20,234		24,639		3,836
Residential		108,167		127,032		4,332		101,882		119,498		4,420
Residential Alt-A		136,995		150,849		23,000		150,396		162,978		25,000
Consumer:
Home equity lines and loans		11,707		13,327		2,986		9,385		10,670		2,306
Automobile		51,649		51,649		15,324		53,710		53,710		11,468
Other		10,578		10,578		4,403		8,401		8,401		2,084

		770,780		974,217		154,396		724,725		934,731		168,001

With no related allowance recorded:
Commercial, financial, leasing, etc.		43,179		52,473		—		53,104		60,778		—
Real estate:
Commercial		62,529		79,604		—		71,636		91,118		—
Residential builder and developer		110,954		128,880		—		133,156		177,277		—
Other commercial construction		4,976		9,386		—		86,652		89,862		—
Residential		17,990		24,930		—		19,686		25,625		—
Residential Alt-A		33,588		62,379		—		34,356		60,942		—

		273,216		357,652		—		398,590		505,602		—

Total:
Commercial, financial, leasing, etc.		161,849		191,950		39,134		171,642		206,288		48,674
Real estate:
Commercial		179,294		227,836		19,323		174,522		219,574		17,651
Residential builder and developer		246,126		372,543		33,490		292,449		458,146		52,562
Other commercial construction		86,053		98,796		12,404		106,886		114,501		3,836
Residential		126,157		151,962		4,332		121,568		145,123		4,420
Residential Alt-A		170,583		213,228		23,000		184,752		223,920		25,000
Consumer:
Home equity lines and loans		11,707		13,327		2,986		9,385		10,670		2,306
Automobile		51,649		51,649		15,324		53,710		53,710		11,468
Other		10,578		10,578		4,403		8,401		8,401		2,084

Total	$	1,043,996		1,331,869		154,396		1,123,315		1,440,333		168,001


	Three months ended June 30, 2012						Three months ended June 30, 2011
			Interest income recognized						Interest income recognized
	Average recorded investment		Total		Cash basis		Average recorded investment		Total		Cash basis
	(in thousands)
Commercial, financial, leasing, etc.	$	161,311		743		743		162,827		679		666
Real estate:
Commercial		180,199		1,238		1,238		194,508		513		483
Residential builder and developer		262,254		385		252		308,709		314		112
Other commercial construction		109,037		4,840		4,840		93,980		187		150
Residential		127,258		1,315		810		97,317		1,029		565
Residential Alt-A		174,181		1,753		527		199,056		1,991		410
Consumer:
Home equity lines and loans		11,237		164		46		12,069		189		23
Automobile		52,200		871		190		58,650		984		292
Other		9,877		106		47		3,544		55		13

Total	$	1,087,554		11,415		8,693		1,130,660		5,941		2,714


	Six months ended June 30, 2012						Six months ended June 30, 2011
			Interest income recognized						Interest income recognized
	Average recorded investment		Total		Cash basis		Average recorded investment		Total		Cash basis
	(in thousands)
Commercial, financial, leasing, etc.	$	164,779		1,152		1,152		167,456		1,672		1,654
Real estate:
Commercial		179,213		1,556		1,556		191,472		895		822
Residential builder and developer		271,903		726		431		317,054		839		240
Other commercial construction		107,151		5,010		5,010		103,751		697		471
Residential		126,880		2,657		1,688		90,813		2,026		1,140
Residential Alt-A		177,623		3,596		1,073		202,339		3,986		961
Consumer:
Home equity lines and loans		10,593		330		88		12,098		349		48
Automobile		52,799		1,769		368		58,655		1,968		588
Other		9,080		199		86		3,304		112		19

Total	$	1,100,021		16,995		11,452		1,146,942		12,544		5,943

In accordance with the previously described policies, the Company utilizes a loan grading system that is applied to all commercial loans and commercial real estate loans. Loan grades are utilized to differentiate risk within the portfolio and consider the expectations of default for each loan. Commercial loans and commercial real estate loans with a lower expectation of default are assigned one of ten possible “pass” loan grades and are generally ascribed lower loss factors when determining the allowance for credit losses. In general, acquired loans that were recorded at estimated fair value on the acquisition date are assigned a “pass” loan grade because their net financial statement value is based on the present value of expected cash flows. Loans with an elevated level of credit risk are classified as “criticized” and are ascribed a higher loss factor when determining the allowance for credit losses. Criticized loans may be classified as “nonaccrual” if the Company no longer expects to collect all amounts according to the contractual terms of the loan agreement or the loan is delinquent 90 days or more. All larger balance criticized commercial and commercial real estate loans are individually reviewed by centralized loan review personnel each quarter to determine the appropriateness of the assigned loan grade, including whether the loan should be reported as accruing or nonaccruing. Smaller balance criticized loans are analyzed by business line risk management areas to ensure proper loan grade classification. Furthermore, criticized nonaccrual commercial loans and commercial real estate loans are considered impaired and, as a result, specific loss allowances on such loans are established within the allowance for credit losses to the extent appropriate in each individual instance. The following table summarizes the loan grades applied to the various classes of the Company’s commercial and commercial real estate loans as of June 30, 2012 and December 31, 2011.


			Real Estate
	Commercial, Financial, Leasing, etc.		Commercial		Residential Builder and Developer		Other Commercial Construction
	(in thousands)
June 30, 2012
Pass	$	15,499,951		20,403,488		989,903		1,903,981
Criticized accrual		742,080		803,640		103,523		254,343
Criticized nonaccrual		153,556		173,278		240,248		26,303

Total	$	16,395,587		21,380,406		1,333,674		2,184,627

December 31, 2011
Pass	$	14,869,636		19,089,252		1,085,970		2,254,609
Criticized accrual		701,202		999,085		140,787		282,399
Criticized nonaccrual		163,598		171,111		281,576		106,325

Total	$	15,734,436		20,259,448		1,508,333		2,643,333

In determining the allowance for credit losses, residential real estate loans and consumer loans are generally evaluated collectively after considering such factors as payment performance, recent loss experience and trends, which are mainly driven by current collateral values in the market place as well as the amount of loan defaults. Loss rates on such loans are determined by reference to recent charge-off history and are evaluated (and adjusted if deemed appropriate) through consideration of other factors including near-term forecasted loss estimates developed by M&T’s Credit Department. In arriving at such forecasts, M&T considers the current estimated fair value of its collateral based on geographical adjustments for home price depreciation/appreciation and overall borrower repayment performance. With regard to collateral values, the realizability of such values by the Company contemplates repayment of any first lien position prior to recovering amounts on a second lien position. However, residential real estate loans and outstanding balances of home equity loans and lines of credit that are more than 150 days past due are generally evaluated for collectibility on a loan-by-loan basis giving consideration to estimated collateral values.

The Company also measures additional losses for purchased impaired loans when it is probable that the Company will be unable to collect all cash flows expected at acquisition plus additional cash flows expected to be collected arising from changes in estimates after acquisition. The determination of the allocated portion of the allowance for credit losses is very subjective. Given that inherent subjectivity and potential imprecision involved in determining the allocated portion of the allowance for credit losses, the Company also provides an inherent unallocated portion of the allowance. The unallocated portion of the allowance is intended to recognize probable losses that are not otherwise identifiable and includes management’s subjective determination of amounts necessary to provide for the possible use of imprecise estimates in determining the allocated portion of the allowance. Therefore, the level of the unallocated portion of the allowance is primarily reflective of the inherent imprecision in the various calculations used in determining the allocated portion of the allowance for credit losses. Other factors that could also lead to changes in the unallocated portion include the effects of expansion into new markets for which the Company does not have the same degree of familiarity and experience regarding portfolio performance in changing market conditions, the introduction of new loan and lease product types, and other risks associated with the Company’s loan portfolio that may not be specifically identifiable.

At June 30, 2012 and December 31, 2011, the allocation of the allowance for credit losses summarized on the basis of the Company’s impairment methodology was as follows:


	Commercial, Financial, Leasing, etc.		Real Estate
	Commercial, Financial, Leasing, etc.		Commercial		Residential		Consumer		Total
	(in thousands)
June 30, 2012
Individually evaluated for impairment	$	38,961		64,143		27,258		22,713	$	153,075
Collectively evaluated for impairment		205,594		275,671		62,182		141,159		684,606
Purchased impaired		173		1,707		3,829		480		6,189

Allocated	$	244,728		341,521		93,269		164,352		843,870

Unallocated										73,158

Total									$	917,028

December 31, 2011
Individually evaluated for impairment	$	48,517		71,784		29,420		15,858	$	165,579
Collectively evaluated for impairment		185,048		291,271		60,742		126,613		663,674
Purchased impaired		457		4,582		1,753		650		7,442

Allocated	$	234,022		367,637		91,915		143,121		836,695

Unallocated										71,595

Total									$	908,290

The recorded investment in loans and leases summarized on the basis of the Company’s impairment methodology as of June 30, 2012 and December 31, 2011 was as follows:


	Commercial, Financial,		Real Estate
	Leasing, etc.		Commercial		Residential		Consumer		Total
	(in thousands)
June 30, 2012
Individually evaluated for impairment	$	161,669		504,281		295,314		73,934	$	1,035,198
Collectively evaluated for impairment		16,217,494		23,901,962		9,469,076		11,666,842		61,255,374
Purchased impaired		16,424		492,464		47,135		4,677		560,700

Total	$	16,395,587		24,898,707		9,811,525		11,745,453	$	62,851,272

December 31, 2011
Individually evaluated for impairment	$	171,442		561,615		306,320		71,496	$	1,110,873
Collectively evaluated for impairment		15,539,232		23,281,585		7,560,104		11,950,849		58,331,770
Purchased impaired		23,762		567,914		56,741		4,945		653,362

Total	$	15,734,436		24,411,114		7,923,165		12,027,290	$	60,096,005

During the normal course of business, the Company modifies loans to maximize recovery efforts. If the borrower is experiencing financial difficulty and a concession is granted, the Company considers such modifications as troubled debt restructurings and classifies those loans as either nonaccrual loans or renegotiated loans. The types of concessions that the Company grants typically include principal deferrals and interest rate concessions, but may also include other types of concessions.

The tables below summarize the Company’s loan modification activities that were considered troubled debt restructurings for the three months ended June 30, 2012 and 2011:


			Recorded investment				Financial effects of modification
Three months ended June 30, 2012	Number		Pre- modification		Post- modification		Recorded investment (a)			Interest (b)
	(dollars in thousands)
Commercial, financial, leasing, etc.
Principal deferral		9	$	10,392	$	9,061	$	(1,331	)	$	—
Other		2		1,995		1,954		(41	)		—
Real estate:
Commercial
Principal deferral		1		2,011		1,999		(12	)		—
Interest rate reduction		1		383		430		47			(89	)
Combination of concession types		4		1,210		1,231		21			(256	)
Residential builder and developer
Principal deferral		3		2,503		2,503		—			—
Other commercial construction
Principal deferral		3		60,888		60,898		10			—
Residential
Principal deferral		7		1,059		1,087		28			—
Combination of concession types		11		2,049		2,098		49			(65	)
Residential Alt-A
Principal deferral		1		153		158		5			—
Combination of concession types		7		1,509		1,543		34			(44	)
Consumer:
Home equity lines and loans
Principal deferral		9		734		734		—			—
Combination of concession types		4		480		480		—			(123	)
Automobile
Principal deferral		196		2,700		2,700		—			—
Interest rate reduction		3		20		20		—			(1	)
Other		21		152		152		—			—
Combination of concession types		77		1,170		1,170		—			(110	)
Other
Principal deferral		7		134		134		—			—
Combination of concession types		18		142		142		—			(22	)

Total		384	$	89,684	$	88,494	$	(1,190	)	$	(710	)

(a)

Financial effects impacting the recorded investment included principal payments or advances, charge-offs and capitalized escrow arrearages.

(b)

Represents the present value of interest rate concessions discounted at the effective rate of the original loan.


			Recorded investment				Financial effects of modification
Three months ended June 30, 2011	Number		Pre- modification		Post- modification		Recorded investment (a)			Interest (b)
	(dollars in thousands)
Commercial, financial, leasing, etc.
Principal deferral		20	$	5,932	$	5,947	$	15		$	—
Combination of concession types		1		1,945		1,945		—			(641	)
Real estate:
Commercial
Principal deferral		9		5,226		5,143		(83	)		—
Residential builder and developer
Principal deferral		3		15,162		14,237		(925	)		—
Other		1		412		412		—			—
Residential
Principal deferral		9		646		622		(24	)		—
Interest rate reduction		3		619		639		20			(13	)
Combination of concession types		29		5,187		5,342		155			(56	)
Residential Alt-A
Principal deferral		1		73		76		3			—
Combination of concession types		6		1,260		1,278		18			(21	)
Consumer:
Home equity lines and loans
Principal deferral		1		69		69		—			—
Combination of concession types		8		719		719		—			(91	)
Automobile
Principal deferral		217		2,845		2,845		—			—
Interest rate reduction		7		87		87		—			(5	)
Other		31		151		151		—			—
Combination of concession types		100		1,139		1,139		—			(80	)
Other
Principal deferral		3		88		88		—			—
Combination of concession types		9		91		91		—			(20	)

Total		458	$	41,651	$	40,830	$	(821	)	$	(927	)

(a)

Financial effects impacting the recorded investment included principal payments or advances, charge-offs and capitalized escrow arrearages.

(b)

Represents the present value of interest rate concessions discounted at the effective rate of the original loan.

The tables below summarize the Company’s loan modification activities that were considered troubled debt restructurings for the six months ended June 30, 2012 and 2011:


			Recorded investment				Financial effects of modification
Six months ended June 30, 2012	Number		Pre- modification		Post- modification		Recorded investment (a)			Interest (b)
	(dollars in thousands)
Commercial, financial, leasing, etc.
Principal deferral		18	$	13,204	$	12,015	$	(1,189	)	$	—
Other		3		2,967		3,052		85			—
Combination of concession types		1		45		44		(1	)		(33	)
Real estate:
Commercial
Principal deferral		3		4,436		4,404		(32	)		—
Interest rate reduction		1		383		430		47			(89	)
Combination of concession types		4		1,210		1,231		21			(256	)
Residential builder and developer
Principal deferral		8		9,325		8,537		(788	)		—
Combination of concession types		2		2,350		2,726		376			—
Other commercial construction
Principal deferral		3		60,888		60,898		10			—
Residential
Principal deferral		22		2,564		2,675		111			—
Combination of concession types		29		4,985		5,105		120			(265	)
Residential Alt-A
Principal deferral		4		550		565		15			—
Combination of concession types		15		2,869		2,937		68			(49	)
Consumer:
Home equity lines and loans
Principal deferral		10		851		851		—			—
Interest rate reduction		1		144		144		—			(6	)
Combination of concession types		6		715		715		—			(147	)
Automobile
Principal deferral		349		4,585		4,585		—			—
Interest rate reduction		7		77		77		—			(5	)
Other		31		171		171		—			—
Combination of concession types		189		2,779		2,779		—			(282	)
Other
Principal deferral		59		781		781		—			—
Interest rate reduction		3		23		23		—			(3	)
Other		9		49		49		—			—
Combination of concession types		52		361		361		—			(58	)

Total		829	$	116,312	$	115,155	$	(1,157	)	$	(1,193	)

(a)

Financial effects impacting the recorded investment included principal payments or advances, charge-offs and capitalized escrow arrearages.

(b)

Represents the present value of interest rate concessions discounted at the effective rate of the original loan.


			Recorded investment				Financial effects of modification
Six months ended June 30, 2011	Number		Pre- modification		Post- modification		Recorded investment (a)			Interest (b)
	(dollars in thousands)
Commercial, financial, leasing, etc.
Principal deferral		33	$	7,281	$	7,281	$	—		$	—
Combination of concession types		1		1,945		1,945		—			(641	)
Real estate:
Commercial
Principal deferral		18		11,851		11,740		(111	)		—
Residential builder and developer
Principal deferral		4		18,586		17,661		(925	)		—
Other		5		116,414		108,806		(7,608	)		—
Combination of concession types		1		798		790		(8	)		—
Other commercial construction
Principal deferral		1		2,275		2,269		(6	)		—
Residential
Principal deferral		12		770		760		(10	)		—
Interest rate reduction		11		1,678		1,718		40			(63	)
Combination of concession types		59		13,094		13,341		247			(813	)
Residential Alt-A
Principal deferral		1		73		76		3			—
Combination of concession types		15		2,862		2,916		54			(231	)
Consumer:
Home equity lines and loans
Principal deferral		1		69		69		—			—
Combination of concession types		10		789		790		1			(127	)
Automobile
Principal deferral		421		6,338		6,338		—			—
Interest rate reduction		11		131		131		—			(8	)
Other		57		258		258		—			—
Combination of concession types		222		4,000		4,000		—			(516	)
Other
Principal deferral		13		162		162		—			—
Other		1		11		11		—			—
Combination of concession types		46		217		217		—			(40	)

Total		943	$	189,602	$	181,279	$	(8,323	)	$	(2,439	)

(a)

Financial effects impacting the recorded investment included principal payments or advances, charge-offs and capitalized escrow arrearages.

(b)

Represents the present value of interest rate concessions discounted at the effective rate of the original loan.

Troubled debt restructurings are considered to be impaired loans and for purposes of establishing the allowance for credit losses are evaluated for impairment giving consideration to the impact of the modified loan terms on the present value of the loan’s expected cash flows. Impairment of troubled debt restructurings that have subsequently defaulted may also be measured based on the loan’s observable market price or the fair value of collateral if the loan is collateral-dependent. Loans that were modified as troubled debt restructurings during the twelve months ended June 30, 2012 and 2011 and for which there was a subsequent payment default during the three-month and six-month periods ended June 30, 2012 and 2011, respectively, were not material.

- Definition

The entire disclosure for claims held for amounts due a entity, excluding financing receivables. Examples include, but are not limited to, trade accounts receivables, notes receivables, loans receivables. Includes disclosure for allowance for credit losses.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5066-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.3,4)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5162-111524

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(k))
-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5074-111524

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Statement of Position (SOP)
-Number 01-6
-Paragraph 13
-Subparagraph d
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 3, 4
-Article 5

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 7
-Article 9

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 08
-Paragraph k
-Article 4

+ Details

Borrowings

6 Months Ended

Jun. 30, 2012

Borrowings [Abstract]

Borrowings

5.	Borrowings

M&T had $1.2 billion of fixed and floating rate junior subordinated deferrable interest debentures (“Junior Subordinated Debentures”) outstanding at June 30, 2012 which are held by various trusts that were issued in connection with the issuance by those trusts of preferred capital securities (“Capital Securities”) and common securities (“Common Securities”). The proceeds from the issuances of the Capital Securities and the Common Securities were used by the trusts to purchase the Junior Subordinated Debentures. The Common Securities of each of those trusts are wholly owned by M&T and are the only class of each trust’s securities possessing general voting powers. The Capital Securities represent preferred undivided interests in the assets of the corresponding trust.

Under the Federal Reserve Board’s current risk-based capital guidelines, the Capital Securities are includable in M&T’s Tier 1 capital. However, the Dodd-Frank Wall Street Reform and Consumer Protection Act of 2010 that was signed into law on July 21, 2010 provides for a three-year phase-in related to the exclusion of trust preferred capital securities from Tier 1 capital for large financial institutions, including M&T. That phase-in period begins on January 1, 2013.

Holders of the Capital Securities receive preferential cumulative cash distributions unless M&T exercises its right to extend the payment of interest on the Junior Subordinated Debentures as allowed by the terms of each such debenture, in which case payment of distributions on the respective Capital Securities will be deferred for comparable periods. During an extended interest period, M&T may not pay dividends or distributions on, or repurchase, redeem or acquire any shares of its capital stock. In the event of an extended interest period exceeding twenty quarterly periods for $350 million of Junior Subordinated Debentures due January 31, 2068, M&T must fund the payment of accrued and unpaid interest through an alternative payment mechanism, which requires M&T to issue common stock, non-cumulative perpetual preferred stock or warrants to purchase common stock until M&T has raised an amount of eligible proceeds at least equal to the aggregate amount of accrued and unpaid deferred interest on the Junior Subordinated Debentures due January 31, 2068. In general, the agreements governing the Capital Securities, in the aggregate, provide a full, irrevocable and unconditional guarantee by M&T of the payment of distributions on, the redemption of, and any liquidation distribution with respect to the Capital Securities. The obligations under such guarantee and the Capital Securities are subordinate and junior in right of payment to all senior indebtedness of M&T.

The Capital Securities will remain outstanding until the Junior Subordinated Debentures are repaid at maturity, are redeemed prior to maturity or are distributed in liquidation to the Trusts. The Capital Securities are mandatorily redeemable in whole, but not in part, upon repayment at the stated maturity dates (ranging from 2027 to 2068) of the Junior Subordinated Debentures or the earlier redemption of the Junior Subordinated Debentures in whole upon the occurrence of one or more events set forth in the indentures relating to the Capital Securities, and in whole or in part at any time after an optional redemption prior to contractual maturity contemporaneously with the optional redemption of the related Junior Subordinated Debentures in whole or in part, subject to possible regulatory approval. In connection with the issuance of 8.50% Enhanced Trust Preferred Securities associated with $350 million of Junior Subordinated Debentures maturing in 2068, M&T entered into a replacement capital covenant that provides that neither M&T nor any of its subsidiaries will repay, redeem or purchase any of the Junior Subordinated Debentures due January 31, 2068 or the 8.50% Enhanced Trust Preferred Securities prior to January 31, 2048, with certain limited exceptions, except to the extent that, during the 180 days prior to the date of that repayment, redemption or purchase, M&T and its subsidiaries have received proceeds from the sale of qualifying securities that (i) have equity-like characteristics that are the same as, or more equity-like than, the applicable characteristics of the 8.50% Enhanced Trust Preferred Securities or the Junior Subordinated Debentures due January 31, 2068, as applicable, at the time of repayment, redemption or purchase, and (ii) M&T has obtained the prior approval of the Federal Reserve Board, if required.

Including the unamortized portions of purchase accounting adjustments to reflect estimated fair value at the acquisition dates of the Common Securities of various trusts, the Junior Subordinated Debentures associated with Capital Securities had financial statement carrying values of $1.2 billion at each of June 30, 2012 and December 31, 2011.

- Definition

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

+ References + Details

Shareholders' equity

6 Months Ended

Jun. 30, 2012

Shareholders' equity [Abstract]

Shareholders' equity

6.	Shareholders’ equity

M&T is authorized to issue 1,000,000 shares of preferred stock with a $1.00 par value per share. Preferred shares outstanding rank senior to common shares both as to dividends and liquidation preference, but have no general voting rights.

Issued and outstanding preferred stock of M&T is presented below:


	Shares issued and outstanding		Carrying value June 30, 2012		Carrying value December 31, 2011
	(dollars in thousands)
Series A (a)(b)
Fixed Rate Cumulative Perpetual Preferred Stock, Series A, $1,000 liquidation preference per share		230,000	$	225,570	$	224,277
Series C (a)(c)
Fixed Rate Cumulative Perpetual Preferred Stock, Series C, $1,000 liquidation preference per share		151,500		142,863		140,308
Series D (d)
Fixed Rate Non-Cumulative Perpetual Preferred Stock, Series D, $10,000 liquidation preference per share		50,000		500,000		500,000

(a)

Shares were issued as part of the Troubled Asset Relief Program – Capital Purchase Program of the U.S. Department of Treasury (“U.S. Treasury”). Cash proceeds were allocated between the preferred stock and a ten-year warrant to purchase M&T common stock (Series A – 1,218,522 common shares at $73.86 per share, Series C – 407,542 common shares at $55.76 per share). Dividends, if declared, will accrue and be paid quarterly at a rate of 5% per year for the first five years following the original 2008 issuance dates and thereafter at a rate of 9% per year. The agreement with the U.S. Treasury contains limitations on certain actions of M&T, including the payment of quarterly cash dividends on M&T’s common stock in excess of $.70 per share, the repurchase of its common stock during the first three years of the agreement, and the amount and nature of compensation arrangements for certain of the Company’s officers.

(b)

On May 18, 2011, M&T redeemed and retired 370,000 shares of Series A Preferred Stock. Accelerated amortization of preferred stock discount associated with the redemption was $11.2 million.

(c)

Shares were assumed in an acquisition and a new Series C Preferred Stock was designated.

(d)

Shares were issued on May 31, 2011. Dividends, if declared, will be paid semi-annually at a rate of 6.875% per year. The shares are redeemable in whole or in part on or after June 15, 2016. Notwithstanding M&T’s option to redeem the shares, if an event occurs such that the shares no longer qualify as Tier 1 capital, M&T may redeem all of the shares within 90 days following that occurrence.

In addition to the Series A and Series C warrants mentioned in (a) above, a ten-year warrant to purchase 95,383 shares of M&T common stock at $518.96 per share was outstanding at June 30, 2012 and December 31, 2011. This warrant was issued by Wilmington Trust in December 2008 as part of the Troubled Asset Relief Program – Capital Purchase Program of the U.S. Treasury along with $330 million of fixed rate cumulative perpetual preferred stock, which was redeemed by M&T immediately prior to the May 16, 2011 acquisition of Wilmington Trust.

- Definition

The entire disclosure for shareholders' equity, comprised of portions attributable to the parent entity and noncontrolling interest, if any, including other comprehensive income (as applicable). Including, but not limited to: (1) balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings; (2) accumulated balance for each classification of other comprehensive income and total amount of comprehensive income; (3) amount and nature of changes in separate accounts, including the number of shares authorized and outstanding, number of shares issued upon exercise and conversion, and for other comprehensive income, the adjustments for reclassifications to net income; (4) rights and privileges of each class of stock authorized; (5) basis of treasury stock, if other than cost, and amounts paid and accounting treatment for treasury stock purchased significantly in excess of market; (6) dividends paid or payable per share and in the aggregate for each class of stock for each period presented; (7) dividend restrictions and accumulated preferred dividends in arrears (in aggregate and per share amount); (8) retained earnings appropriations or restrictions, such as dividend restrictions; (9) impact of change in accounting principle, initial adoption of new accounting principle and correction of an error in previously issued financial statements; (10) shares held in trust for Employee Stock Ownership Plan (ESOP); (11) deferred compensation related to issuance of capital stock; (12) note received for issuance of stock; (13) unamortized discount on shares; (14) description, terms, and number of warrants or rights outstanding; (15) shares under subscription and subscription receivables, effective date of new retained earnings after quasi-reorganization and deficit eliminated by quasi-reorganization and, for a period of at least ten years after the effective date, the point in time from which the new retained dates; and (16) retroactive effective of subsequent change in capital structure.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(d),(e))
-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21484-112644

Reference 3: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SAB TOPIC 4.E)
-URI http://asc.fasb.org/extlink&oid=6228006&loc=d3e74512-122707

Reference 4: http://www.xbrl.org/2003/role/presentationRef
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-Section 50
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-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21488-112644

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.29-31)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Reference 7: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=6959260&loc=d3e187085-122770

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 30
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-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23285-112656

Reference 10: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Preferred Stock
-URI http://asc.fasb.org/extlink&oid=6521494

Reference 12: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21564-112644

Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 43
-Section B
-Paragraph 7, 11A
-Chapter 1
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 15: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Principles Board Opinion (APB)
-Number 12
-Paragraph 10
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 16: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 17: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 08
-Paragraph d
-Article 4

Reference 18: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 29, 30, 31
-Article 5

Reference 19: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 4
-Section E

Reference 20: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 08
-Article 4

Reference 21: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 4
-Section C

Reference 22: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 129
-Paragraph 2, 3, 4, 5, 6, 7, 8
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 23: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Article 3

+ Details

Pension plans and other postretirement benefits

6 Months Ended

Jun. 30, 2012

Pension plans and other postretirement benefits [Abstract]

Pension plans and other postretirement benefits

7.	Pension plans and other postretirement benefits

The Company provides defined benefit pension and other postretirement benefits (including health care and life insurance benefits) to qualified retired employees. Net periodic defined benefit cost for defined benefit plans consisted of the following:


	Pension benefits						Other postretirement benefits
	Three months ended June 30
	2012			2011			2012		2011
	(in thousands)
Service cost	$	6,875			6,413			159		115
Interest cost on projected benefit obligation		15,418			14,086			919		909
Expected return on plan assets		(17,581	)		(14,563	)		—		—
Amortization of prior service cost		(1,629	)		(1,629	)		10		29
Amortization of net actuarial loss		9,183			5,165			165		18

Net periodic benefit cost	$	12,266			9,472			1,253		1,071


	Pension benefits						Other postretirement benefits
	Six months ended June 30
	2012			2011			2012		2011
	(in thousands)
Service cost	$	14 ,775			11,713			334		240
Interest cost on projected benefit obligation		31,018			26,236			1,869		1,684
Expected return on plan assets		(35,256	)		(27,263	)		—		—
Amortization of prior service cost		(3,279	)		(3,279	)		10		54
Amortization of net actuarial loss		18,583			10,265			265		18

Net periodic benefit cost	$	25,841			17,672			2,478		1,996

Expense incurred in connection with the Company’s defined contribution pension and retirement savings plans totaled $11,390,000 and $9,890,000 for the three months ended June 30, 2012 and 2011, respectively, and $26,015,000 and $20,066,000 for the six months ended June 30, 2012 and 2011, respectively.

- Definition

The entire disclosure for pension and other postretirement benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-URI http://asc.fasb.org/topic&trid=2235017

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Implementation Guide (Q and A)
-Number FAS88
-Paragraph 63
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 106
-Paragraph 518
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph a
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number 03-2
-Paragraph 8
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 264
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph q
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph h
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 8
-Subparagraph m
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5, 6, 7, 8
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 12: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 158
-Paragraph 7, 21, 22
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 13: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS106-2
-Paragraph 20, 21, 22
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Principles Board Opinion (APB)
-Number 30
-Paragraph 26
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Earnings per common share

6 Months Ended

Jun. 30, 2012

Earnings per common share [Abstract]

Earnings per common share

8.	Earnings per common share

The computations of basic earnings per common share follow:


	Three months ended June 30						Six months ended June 30
	2012			2011			2012			2011
	(in thousands, except per share)
Income available to common shareholders:
Net income	$	233,380			322,358			439,843			528,631
Less: Preferred stock dividends (a)		(13,362	)		(7,184	)		(26,725	)		(17,682	)
Amortization of preferred stock discount (a)		(1,964	)		(13,531	)		(3,888	)		(16,284	)

Net income available to common equity		218,054			301,643			409,230			494,665
Less: Income attributable to unvested stock-based compensation awards		(3,345	)		(4,479	)		(6,283	)		(7,382	)

Net income available to common shareholders	$	214,709			297,164			402,947			487,283
Weighted-average shares outstanding:
Common shares outstanding (including common stock issuable) and unvested stock-based compensation awards		127,445			124,035			127,301			122,522
Less: Unvested stock-based compensation awards		(1,957	)		(1,854	)		(1,947	)		(1,823	)

Weighted-average shares outstanding		125,488			122,181			125,354			120,699
Basic earnings per common share	$	1.71			2.43			3.21			4.04

(a)

Including impact of not as yet declared cumulative dividends.

The computations of diluted earnings per common share follow:


	Three months ended June 30						Six months ended June 30
	2012			2011			2012			2011
	(in thousands, except per share)
Net income available to common equity	$	218,054			301,643			409,230			494,665
Less: Income attributable to unvested stock-based compensation awards		(3,338	)		(4,464	)		(6,272	)		(7,357	)

Net income available to common shareholders	$	214,716			297,179			402,958			487,308
Adjusted weighted-average shares outstanding:
Common and unvested stock-based compensation awards		127,445			124,035			127,301			122,522
Less: Unvested stock-based compensation awards		(1,957	)		(1,854	)		(1,947	)		(1,823	)
Plus: Incremental shares from assumed conversion of stock-based compensation awards and convertible preferred stock		409			615			402			633

Adjusted weighted-average shares outstanding		125,897			122,796			125,756			121,332
Diluted earnings per common share	$	1.71			2.42			3.20			4.02

GAAP defines unvested share-based awards that contain nonforfeitable rights to dividends or dividend equivalents (whether paid or unpaid) as participating securities that shall be included in the computation of earnings per common share pursuant to the two-class method. During the six-month periods ended June 30, 2012 and 2011, the Company issued stock-based compensation awards in the form of restricted stock and restricted stock units, which, in accordance with GAAP, are considered participating securities.

Stock-based compensation awards, warrants to purchase common stock of M&T and preferred stock convertible into shares of M&T stock representing approximately 9.9 million and 10.1 million common shares during the three-month periods ended June 30, 2012 and 2011, respectively, and 10.0 million and 10.3 million common shares during the six-month periods ended June 30, 2012 and 2011, respectively, were not included in the computations of diluted earnings per common share because the effect on those periods would have been antidilutive.

Comprehensive income

6 Months Ended

Jun. 30, 2012

Comprehensive Income [Abstract]

Comprehensive income

9.	Comprehensive income

The following table displays the components of other comprehensive income (loss):


	Before-tax amount			Income taxes			Net
	(in thousands)
For the six months ended June 30, 2012
Unrealized gains (losses) on investment securities:
Available-for-sale (“AFS”) investment securities with other-than-temporary impairment (“OTTI”):
Unrealized holding losses, net	$	(8,024	)	$	3,149		$	(4,875	)
Less: OTTI charges recognized in net income		(22,304	)		8,754			(13,550	)

Net change for AFS investment securities with OTTI		14,280			(5,605	)		8,675
AFS investment securities – all other:
Unrealized holding gains, net		93,177			(36,535	)		56,642
Less: reclassification adjustment for losses realized in net income		(363	)		145			(218	)

Net change for AFS investment securities – all other		93,540			(36,680	)		56,860
Held-to-maturity (“HTM”) investment securities with OTTI:
Unrealized holding losses, net		(2,848	)		1,118			(1,730	)
Less: reclassification to income of unrealized holding losses		(1,497	)		587			(910	)
Less: OTTI charges recognized in net income		(5,355	)		2,102			(3,253	)

Net change for HTM investment securities with OTTI		4,004			(1,571	)		2,433

Reclassification to income of unrealized holding losses on investment securities previously transferred from AFS to HTM		2,310			(907	)		1,403

Net unrealized gains on investment securities		114,134			(44,763	)		69,371
Reclassification to income for amortization of gains on terminated cash flow hedges		(178	)		66			(112	)
Foreign currency translation adjustment		(208	)		77			(131	)
Defined benefit plans liability adjustment		15,579			(6,115	)		9,464

	$	129,327		$	(50,735	)	$	78,592

For the six months ended June 30, 2011
Unrealized gains (losses) on investment securities:
AFS investment securities with OTTI:
Unrealized holding losses, net	$	(11,227	)	$	4,501		$	(6,726	)
Less: reclassification adjustment for gains realized in net income		3,814			(1,497	)		2,317
Less: OTTI charges recognized in net income		(32,071	)		12,587			(19,484	)

Net change for AFS investment securities with OTTI		17,030			(6,589	)		10,441
AFS investment securities – all other:
Unrealized holding gains, net		77,869			(30,368	)		47,501
Less: reclassification adjustment for gains realized in net income		146,115			(57,257	)		88,858

Net change for AFS investment securities – all other		(68,246	)		26,889			(41,357	)
HTM investment securities with OTTI:
Unrealized holding losses, net		(8,500	)		3,336			(5,164	)
Less: reclassification to income of unrealized holding losses		(12	)		5			(7	)
Less: OTTI charges recognized in net income		(10,500	)		4,121			(6,379	)

Net change for HTM investment securities with OTTI		2,012			(790	)		1,222

Reclassification to income of unrealized holding losses on investment securities previously transferred from AFS to HTM		2,967			(1,165	)		1,802

Net unrealized gains on investment securities		(46,237	)		18,345			(27,892	)
Reclassification to income for amortization of gains on terminated cash flow hedges		(224	)		83			(141	)
Foreign currency translation adjustment		313			(117	)		196
Defined benefit plans liability adjustment		7,058			(2,770	)		4,288

	$	(39,090	)	$	15,541		$	(23,549	)


	Investment securities						Cash flow			Foreign currency translation			Defined benefit
	With OTTI			All other			hedges			adjustment			plans			Total
	(in thousands)
Balance – January 1, 2012	$	(84,029	)		5,995			112			(803	)		(277,716	)		(356,441	)
Net gain (loss) during period		11,108			58,263			(112	)		(131	)		9,464			78,592

Balance – June 30, 2012	$	(72,921	)		64,258			—			(934	)		(268,252	)		(277,849	)

Balance – January 1, 2011	$	(87,053	)		2,332			393			—			(120,892	)		(205,220	)
Net gain (loss) during period		11,663			(39,555	)		(141	)		196			4,288			(23,549	)

Balance – June 30, 2011	$	(75,390	)		(37,223	)		252			196			(116,604	)		(228,769	)

- Definition

The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=20435746&loc=d3e689-108580

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=20435746&loc=SL7669619-108580

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 17
-URI http://asc.fasb.org/extlink&oid=20435746&loc=d3e716-108580

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=20435746&loc=d3e640-108580

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 16
-URI http://asc.fasb.org/extlink&oid=20435746&loc=d3e709-108580

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=20435746&loc=d3e637-108580

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=6959260&loc=d3e187085-122770

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Reclassification Adjustments
-URI http://asc.fasb.org/extlink&oid=6522872

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 14
-URI http://asc.fasb.org/extlink&oid=20435746&loc=d3e681-108580

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 130
-Paragraph 14-26
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Derivative financial instruments

6 Months Ended

Jun. 30, 2012

Derivative financial instruments [Abstract]

Derivative financial instruments

10.

Derivative financial instruments

As part of managing interest rate risk, the Company enters into interest rate swap agreements to modify the repricing characteristics of certain portions of the Company’s portfolios of earning assets and interest-bearing liabilities. The Company designates interest rate swap agreements utilized in the management of interest rate risk as either fair value hedges or cash flow hedges. Interest rate swap agreements are generally entered into with counterparties that meet established credit standards and most contain master netting and collateral provisions protecting the at-risk party. Based on adherence to the Company’s credit standards and the presence of the netting and collateral provisions, the Company believes that the credit risk inherent in these contracts is not significant as of June 30, 2012.

The net effect of interest rate swap agreements was to increase net interest income by $9 million for each of the three-month periods ended June 30, 2012 and 2011, and $18 million and $19 million for the six-month periods ended June 30, 2012 and 2011, respectively. Information about interest rate swap agreements entered into for interest rate risk management purposes summarized by type of financial instrument the swap agreements were intended to hedge follows:


	Notional amount		Average maturity		Weighted- average rate
	Notional amount		Average maturity		Fixed			Variable
	(in thousands)		(in years)
June 30, 2012
Fair value hedges:
Fixed rate long-term borrowings (a)	$	900,000		4.9		6.07	%		2.01	%

December 31, 2011
Fair value hedges:
Fixed rate long-term borrowings (a)	$	900,000		5.4		6.07	%		2.07	%

(a)

Under the terms of these agreements, the Company receives settlement amounts at a fixed rate and pays at a variable rate.

The Company utilizes commitments to sell residential and commercial real estate loans to hedge the exposure to changes in the fair value of real estate loans held for sale. Such commitments have generally been designated as fair value hedges. The Company also utilizes commitments to sell real estate loans to offset the exposure to changes in fair value of certain commitments to originate real estate loans for sale.

Derivative financial instruments used for trading purposes included interest rate contracts, foreign exchange and other option contracts, foreign exchange forward and spot contracts, and financial futures. Interest rate contracts entered into for trading purposes had notional values of $15.0 billion and $13.9 billion at June 30, 2012 and December 31, 2011, respectively. The notional amounts of foreign currency and other option and futures contracts entered into for trading purposes aggregated $1.4 billion at each of June 30, 2012 and December 31, 2011.

Information about the fair values of derivative instruments in the Company’s consolidated balance sheet and consolidated statement of income follows:


	Asset derivatives				Liability derivatives
	Fair value				Fair value
	June 30, 2012		December 31, 2011		June 30, 2012		December 31, 2011
	(in thousands)
Derivatives designated and qualifying as hedging instruments
Fair value hedges:
Interest rate swap agreements (a)	$	149,947		147,302	$	—		—
Commitments to sell real estate loans (a)		446		232		5,274		2,287

		150,393		147,534		5,274		2,287
Derivatives not designated and qualifying as hedging instruments
Mortgage-related commitments to originate real estate loans for sale (a)		34,111		7,991		60		1,068
Commitments to sell real estate loans (a)		992		1,328		9,021		2,771
Trading:
Interest rate contracts (b)		439,617		443,033		409,653		415,836
Foreign exchange and other option and futures contracts (b)		19,628		19,115		20,448		18,723

		494,348		471,467		439,182		438,398

Total derivatives	$	644,741		619,001	$	444,456		440,685

(a)

Asset derivatives are reported in other assets and liability derivatives are reported in other liabilities.

(b)

Asset derivatives are reported in trading account assets and liability derivatives are reported in other liabilities.


	Amount of unrealized gain (loss) recognized
	Three months ended June 30, 2012						Three months ended June 30, 2011
	Derivative			Hedged item			Derivative			Hedged item
	(in thousands)
Derivatives in fair value hedging relationships
Interest rate swap agreements:
Fixed rate long-term borrowings (a)	$	9,674			(9,168	)	$	21,945			(21,145	)

Derivatives not designated as hedging instruments
Trading:
Interest rate contracts (b)	$	2,080					$	1,001
Foreign exchange and other option and futures contracts (b)		(2,435	)					(743	)

Total	$	(355	)				$	258


	Amount of unrealized gain (loss) recognized
	Six months ended June 30, 2012						Six months ended June 30, 2011
	Derivative			Hedged item			Derivative			Hedged item
	(in thousands)
Derivatives in fair value hedging relationships
Interest rate swap agreements:
Fixed rate long-term borrowings (a)	$	2,645			(2,624	)	$	9,540			(9,097	)

Derivatives not designated as hedging instruments
Trading:
Interest rate contracts (b)	$	3,219					$	1,476
Foreign exchange and other option and futures contracts (b)		(3,145	)					(1,291	)

Total	$	74					$	185

(a)

Reported as other revenues from operations.

(b)

Reported as trading account and foreign exchange gains.

In addition, the Company also has commitments to sell and commitments to originate residential and commercial real estate loans that are considered derivatives. The Company designates certain of the commitments to sell real estate loans as fair value hedges of real estate loans held for sale. The Company also utilizes commitments to sell real estate loans to offset the exposure to changes in the fair value of certain commitments to originate real estate loans for sale. As a result of these activities, net unrealized pre-tax gains related to hedged loans held for sale, commitments to originate loans for sale and commitments to sell loans were approximately $43 million and $12 million at June 30, 2012 and December 31, 2011, respectively. Changes in unrealized gains and losses are included in mortgage banking revenues and, in general, are realized in subsequent periods as the related loans are sold and commitments satisfied.

The aggregate fair value of derivative financial instruments in a net liability position at June 30, 2012 for which the Company was required to post collateral was $329 million. The fair value of collateral posted for such instruments was $303 million. Certain of the Company’s derivative financial instruments contain provisions that require the Company to maintain specific credit ratings from credit rating agencies to avoid higher collateral posting requirements. If the Company’s debt rating were to fall below specified ratings, the counterparties to the derivative financial instruments could demand immediate incremental collateralization on those instruments in a net liability position. The aggregate fair value of all derivative financial instruments with such credit-risk-related contingent features in a net liability position on June 30, 2012 was $98 million, for which the Company had posted collateral of $69 million in the normal course of business. If the credit-risk-related contingent features had been triggered on June 30, 2012, the maximum amount of additional collateral the Company would have been required to post to counterparties was $29 million.

The Company’s credit exposure with respect to the estimated fair value as of June 30, 2012 of interest rate swap agreements used for managing interest rate risk has been substantially mitigated through master netting agreements with trading account interest rate contracts with the same counterparties as well as counterparty postings of $69 million of collateral with the Company. Trading account interest rate swap agreements entered into with customers are subject to the Company’s credit standards and often contain collateral provisions.

- Definition

The entire disclosure for the entity's entire derivative instruments and hedging activities. Describes an entity's risk management strategies, derivatives in hedging activities and non-hedging derivative instruments, the assets, obligations, liabilities, revenues and expenses arising therefrom, and the amounts of and methodologies and assumptions used in determining the amounts of such items.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 30
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6441202&loc=d3e80720-113993

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624163-113959

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
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+ Details

Variable interest entities and asset securitizations

6 Months Ended

Jun. 30, 2012

Variable interest entities and asset securitizations [Abstract]

Variable interest entities and asset securitizations

11.

Variable interest entities and asset securitizations

In accordance with GAAP, the Company determined that it was the primary beneficiary of a residential mortgage loan securitization trust considering its role as servicer and its retained subordinated interests in the trust. As a result, the Company has included the one-to-four family residential mortgage loans that were included in the trust in its consolidated financial statements. At June 30, 2012 and December 31, 2011, the carrying values of the loans in the securitization trust were $174 million and $196 million, respectively. The outstanding principal amount of mortgage-backed securities issued by the qualified special purpose trust that was held by parties unrelated to M&T at June 30, 2012 and December 31, 2011 was $26 million and $30 million, respectively. Because the transaction was non-recourse, the Company’s maximum exposure to loss as a result of its association with the trust at June 30, 2012 is limited to realizing the carrying value of the loans less the amount of the mortgage-backed securities held by third parties.

As described in note 5, M&T has issued junior subordinated debentures payable to various trusts that have issued Capital Securities. M&T owns the common securities of those trust entities. The Company is not considered to be the primary beneficiary of those entities and, accordingly, the trusts are not included in the Company’s consolidated financial statements. At June 30, 2012 and December 31, 2011, the Company included the junior subordinated debentures as “long-term borrowings” in its consolidated balance sheet. The Company has recognized $34 million in other assets for its “investment” in the common securities of the trusts that will be concomitantly repaid to M&T by the respective trust from the proceeds of M&T’s repayment of the junior subordinated debentures associated with preferred capital securities described in note 5.

The Company has invested as a limited partner in various real estate partnerships that collectively had total assets of approximately $1.4 billion at each of June 30, 2012 and December 31, 2011. Those partnerships generally construct or acquire properties for which the investing partners are eligible to receive certain federal income tax credits in accordance with government guidelines. Such investments may also provide tax deductible losses to the partners. The partnership investments also assist the Company in achieving its community reinvestment initiatives. As a limited partner, there is no recourse to the Company by creditors of the partnerships. However, the tax credits that result from the Company’s investments in such partnerships are generally subject to recapture should a partnership fail to comply with the respective government regulations. The Company’s maximum exposure to loss of its investments in such partnerships was $266 million, including $73 million of unfunded commitments, at June 30, 2012 and $271 million, including $75 million of unfunded commitments, at December 31, 2011. The Company has not provided financial or other support to the partnerships that was not contractually required. Management currently estimates that no material losses are probable as a result of the Company’s involvement with such entities. In accordance with the accounting provisions for variable interest entities, the Company, in its position as limited partner, does not direct the activities that most significantly impact the economic performance of the partnerships and, therefore, the partnership entities are not included in the Company’s consolidated financial statements.

Fair value measurements

6 Months Ended

Jun. 30, 2012

Fair value measurements [Abstract]

Fair value measurements

12.

Fair value measurements

GAAP permits an entity to choose to measure eligible financial instruments and other items at fair value. The Company has not made any fair value elections at June 30, 2012.

Pursuant to GAAP, fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. A three-level hierarchy exists in GAAP for fair value measurements based upon the inputs to the valuation of an asset or liability.

•

Level 1 – Valuation is based on quoted prices in active markets for identical assets and liabilities.

•

Level 2 – Valuation is determined from quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar instruments in markets that are not active or by model-based techniques in which all significant inputs are observable in the market.

•

Level 3 – Valuation is derived from model-based and other techniques in which at least one significant input is unobservable and which may be based on the Company’s own estimates about the assumptions that market participants would use to value the asset or liability.

When available, the Company attempts to use quoted market prices in active markets to determine fair value and classifies such items as Level 1 or Level 2. If quoted market prices in active markets are not available, fair value is often determined using model-based techniques incorporating various assumptions including interest rates, prepayment speeds and credit losses. Assets and liabilities valued using model-based techniques are classified as either Level 2 or Level 3, depending on the lowest level classification of an input that is considered significant to the overall valuation. The following is a description of the valuation methodologies used for the Company’s assets and liabilities that are measured on a recurring basis at estimated fair value.

Trading account assets and liabilities

Trading account assets and liabilities consist primarily of interest rate swap agreements and foreign exchange contracts with customers who require such services with offsetting positions with third parties to minimize the Company’s risk with respect to such transactions. The Company generally determines the fair value of its derivative trading account assets and liabilities using externally developed pricing models based on market observable inputs and, therefore, classifies such valuations as Level 2. Mutual funds held in connection with deferred compensation arrangements have been classified as Level 1 valuations. Valuations of investments in municipal and other bonds can generally be obtained through reference to quoted prices in less active markets for the same or similar securities or through model-based techniques in which all significant inputs are observable and, therefore, such valuations have been classified as Level 2.

Investment securities available for sale

The majority of the Company’s available-for-sale investment securities have been valued by reference to prices for similar securities or through model-based techniques in which all significant inputs are observable and, therefore, such valuations have been classified as Level 2. Certain investments in mutual funds and equity securities are actively traded and, therefore, have been classified as Level 1 valuations.

The markets for privately issued mortgage-backed securities have experienced a sharp reduction of non-agency mortgage-backed securities issuances, a significant reduction in trading volumes and wide bid-ask spreads. Although estimated prices were generally obtained for such securities, the Company was significantly restricted in the level of market observable assumptions used in the valuation of its privately issued mortgage-backed securities portfolio. Specifically, market assumptions regarding credit adjusted cash flows and liquidity influences on discount rates were difficult to observe at the individual bond level. Because of the inactivity in the markets and the lack of observable valuation inputs, the Company has classified the valuation of privately issued mortgage-backed securities as Level 3.

The Company supplemented its determination of fair value for many of its privately issued mortgage-backed securities by obtaining pricing indications from two independent sources at June 30, 2012 and December 31, 2011. However, the Company could not readily ascertain that the basis of such valuations could be ascribed to orderly and observable trades in the market for privately issued residential mortgage-backed securities. As a result, the Company also performed internal modeling to estimate the cash flows and fair value of privately issued residential mortgage-backed securities with an amortized cost basis of $1.2 billion at June 30, 2012 and $1.3 billion at December 31, 2011. The Company’s internal modeling techniques included discounting estimated bond-specific cash flows using assumptions about cash flows associated with loans underlying each of the bonds, including estimates about the timing and amount of credit losses and prepayments. In estimating those cash flows, the Company used assumptions as to future delinquency, defaults, collateral valuation and loss rates. Differences between internal model valuations and external pricing indications were generally considered to be reflective of the lack of liquidity in the market for privately issued mortgage-backed securities given the nature of the cash flow modeling performed in the Company’s assessment of value. To determine the point within the range of potential values that was most representative of fair value under current market conditions for each of the bonds, the Company averaged the internal model valuations and the indications obtained from the two independent pricing sources, such that at June 30, 2012, the weighted-average reliance on internal model pricing for the bonds modeled was 33% with a 67% average weighting placed on the values provided by the independent sources. Significant unobservable inputs used in the Company’s modeling of fair value for residential mortgage-backed securities are included in the accompanying table of significant unobservable inputs to Level 3 measurements. The Company concluded its estimate of fair value for the $1.2 billion of privately issued residential mortgage-backed securities to approximate $1.1 billion, which reflects a market yield based on reasonably likely cash flows of 7.3%. The Company determined the fair value of its privately issued commercial mortgage-backed securities held in its available-for-sale portfolio using quoted market prices obtained from third party pricing services without adjustment. Similar to privately-issued residential mortgage-backed securities, the market for commercial mortgage-backed securities has experienced significant declines in the level of market activity, resulting in the classification of such bonds as Level 3.

Included in collateralized debt obligations are securities backed by trust preferred securities issued by financial institutions and other entities. Given the severe disruption in the credit markets and the wide disparity in observable trade information, the Company could not obtain pricing indications for many of these securities from its two primary independent pricing sources. The Company, therefore, performed internal modeling to estimate the cash flows and fair value of its portfolio of securities backed by trust preferred securities at June 30, 2012 and December 31, 2011. The modeling techniques included estimating cash flows using bond-specific assumptions about future collateral defaults and related loss severities. The resulting cash flows were then discounted by reference to market yields observed in the single-name trust preferred securities market. In determining a market yield applicable to the estimated cash flows, a margin over LIBOR, ranging from 5% to 10% with a weighted-average of 8% was used. Significant unobservable inputs used in the determination of estimated fair value of collateralized debt obligations are included in the accompanying table of significant unobservable inputs to Level 3 measurements. At June 30, 2012, the total amortized cost and fair value of securities backed by trust preferred securities issued by financial institutions and other entities were $44 million and $55 million, respectively, and at December 31, 2011 were $44 million and $53 million, respectively. Privately issued mortgage-backed securities and securities backed by trust preferred securities issued by financial institutions and other entities constituted all of the available-for-sale investment securities classified as Level 3 valuations as of June 30, 2012 and December 31, 2011.

The Company ensures an appropriate control framework is in place over the valuation processes and techniques used for Level 3 fair value measurements. Specifically, the Company attempts to obtain the market observable inputs used by third party pricing sources on a sample of bonds each quarter. Analytical procedures are performed to understand changes in fair value from period to period. Internal pricing models are subject to validation procedures including testing of mathematical constructs, review of valuation methodology and significant assumptions used.

Real estate loans held for sale

The Company utilizes commitments to sell real estate loans to hedge the exposure to changes in fair value of real estate loans held for sale. The carrying value of hedged real estate loans held for sale includes changes in estimated fair value during the hedge period. Typically, the Company attempts to hedge real estate loans held for sale from the date of close through the sale date. The fair value of hedged real estate loans held for sale is generally calculated by reference to quoted prices in secondary markets for commitments to sell real estate loans with similar characteristics and, accordingly, such loans have been classified as a Level 2 valuation.

Commitments to originate real estate loans for sale and commitments to sell real estate loans

The Company enters into various commitments to originate real estate loans for sale and commitments to sell real estate loans. Such commitments are considered to be derivative financial instruments and, therefore, are carried at estimated fair value on the consolidated balance sheet. The estimated fair values of such commitments were generally calculated by reference to quoted prices in secondary markets for commitments to sell real estate loans to certain government-sponsored entities and other parties. The fair valuations of commitments to sell real estate loans generally result in a Level 2 classification. The estimated fair value of commitments to originate real estate loans for sale are adjusted to reflect the Company’s anticipated commitment expirations. The estimated commitment expirations are considered significant unobservable inputs contributing to the Level 3 classification of commitments to originate real estate loans for sale. Significant unobservable inputs used in the determination of estimated fair value of commitments to originate real estate loans for sale are included in the accompanying table of significant unobservable inputs to Level 3 measurements.

Interest rate swap agreements used for interest rate risk management

The Company utilizes interest rate swap agreements as part of the management of interest rate risk to modify the repricing characteristics of certain portions of its portfolios of earning assets and interest-bearing liabilities. The Company generally determines the fair value of its interest rate swap agreements using externally developed pricing models based on market observable inputs and, therefore, classifies such valuations as Level 2. The Company has considered counterparty credit risk in the valuation of its interest rate swap agreement assets and has considered its own credit risk in the valuation of its interest rate swap agreement liabilities.

The following tables present assets and liabilities at June 30, 2012 and December 31, 2011 measured at estimated fair value on a recurring basis:


	Fair value measurements at June 30, 2012		Level 1 (a)		Level 2 (a)		Level 3
	(in thousands)
Trading account assets	$	544,938		53,472		491,466		—
Investment securities available for sale:
U.S. Treasury and federal agencies		56,599		—		56,599		—
Obligations of states and political subdivisions		34,568		—		34,568		—
Mortgage-backed securities:
Government issued or guaranteed		4,058,500		—		4,058,500		—
Privately issued residential		1,068,392		—		—		1,068,392
Privately issued commercial		12,127		—		—		12,127
Collateralized debt obligations		55,098		—		—		55,098
Other debt securities		128,929		—		128,929		—
Equity securities		119,841		108,172		11,669		—

		5,534,054		108,172		4,290,265		1,135,617

Real estate loans held for sale		442,664		—		442,664		—
Other assets (b)		185,496		—		151,385		34,111

Total assets	$	6,707,152		161,644		5,375,780		1,169,728

Trading account liabilities	$	430,101		—		430,101		—
Other liabilities (b)		14,355		—		14,295		60

Total liabilities	$	444,456		—		444,396		60


	Fair value measurements at December 31, 2011		Level 1 (a)		Level 2 (a)		Level 3
	(in thousands)
Trading account assets	$	561,834		53,165		508,669		—
Investment securities available for sale:
U.S. Treasury and federal agencies		70,723		—		70,723		—
Obligations of states and political subdivisions		40,269		—		40,269		—
Mortgage-backed securities:
Government issued or guaranteed		4,521,233		—		4,521,233		—
Privately issued residential		1,136,256		—		—		1,136,256
Privately issued commercial		15,029		—		—		15,029
Collateralized debt obligations		52,500		—		—		52,500
Other debt securities		176,845		—		176,845		—
Equity securities		215,705		205,587		10,118		—

		6,228,560		205,587		4,819,188		1,203,785

Real estate loans held for sale		371,437		—		371,437		—
Other assets (b)		156,853		—		148,862		7,991

Total assets	$	7,318,684		258,752		5,848,156		1,211,776

Trading account liabilities	$	434,559		—		434,559		—
Other liabilities (b)		6,126		—		5,058		1,068

Total liabilities	$	440,685		—		439,617		1,068

(a)

There were no significant transfers between Level 1 and Level 2 of the fair value hierarchy during the three months and six months ended June 30, 2012 and 2011.

(b)

Comprised predominantly of interest rate swap agreements used for interest rate risk management (Level 2), commitments to sell real estate loans (Level 2) and commitments to originate real estate loans to be held for sale (Level 3).

The changes in Level 3 assets and liabilities measured at estimated fair value on a recurring basis during the three months ended June 30, 2012 were as follows:


	Investment securities available for sale
	Privately issued residential mortgage-backed securities			Privately issued commercial mortgage-backed securities			Collateralized debt obligations			Other assets and other liabilities
	(in thousands)
Balance – March 31, 2012	$	1,110,695		$	13,435		$	58,184		$	20,435
Total gains (losses) realized/unrealized:
Included in earnings		(14,627	)(a)		—			—			45,486	(b)
Included in other comprehensive income		22,613	(e)		763	(e)		(2,712	)(e)		—
Settlements		(50,289	)		(2,071	)		(374	)		—
Transfers in and/or out of Level 3 (c)		—			—			—			(31,870	)(d)

Balance – June 30, 2012	$	1,068,392		$	12,127		$	55,098		$	34,051

Changes in unrealized gains (losses) included in earnings related to assets still held at June 30, 2012	$	(14,627	)(a)	$	—		$	—		$	28,904	(b)

The changes in Level 3 assets and liabilities measured at estimated fair value on a recurring basis during the three months ended June 30, 2011 were as follows:


	Investment securities available for sale
	Privately issued residential mortgage-backed securities			Privately issued commercial mortgage-backed securities			Collateralized debt obligations			Other assets and other liabilities
	(in thousands)
Balance – March 31, 2011	$	1,391,878		$	20,467		$	114,265		$	16,147
Total gains (losses) realized/unrealized:
Included in earnings		(24,530	)(a)		—			—			22,800	(b)
Included in other comprehensive income		38,471	(e)		(1,400	)(e)		3,372	(e)		—
Purchases		—			—			50,790			—
Sales		—			—			(105,643	)		—
Settlements		(99,617	)		(1,834	)		(1,183	)		—
Transfers in and/or out of Level 3 (c)		—			—			—			(25,776	)(d)

Balance – June 30, 2011	$	1,306,202		$	17,233		$	61,601		$	13,171

Changes in unrealized gains (losses) included in earnings related to assets still held at June 30, 2011	$	(24,530	)(a)	$	—		$	—		$	10,252	(b)

The changes in Level 3 assets and liabilities measured at estimated fair value on a recurring basis during the six months ended June 30, 2012 were as follows:


	Investment securities available for sale
	Privately issued residential mortgage-backed securities			Privately issued commercial mortgage-backed securities			Collateralized debt obligations			Other assets and other liabilities
	(in thousands)
Balance – January 1, 2012	$	1,136,256		$	15,029		$	52,500		$	6,923
Total gains (losses) realized/unrealized:
Included in earnings		(22,304	)(a)		—			—			72,517	(b)
Included in other comprehensive income		47,683	(e)		1,111	(e)		3,711	(e)		—
Settlements		(93,243	)		(4,013	)		(1,113	)		—
Transfers in and/or out of Level 3 (c)		—			—			—			(45,389	)(d)

Balance – June 30, 2012	$	1,068,392		$	12,127		$	55,098		$	34,051

Changes in unrealized gains (losses) included in earnings related to assets still held at June 30, 2012	$	(22,304	)(a)	$	—		$	—		$	33,647	(b)

The changes in Level 3 assets and liabilities measured at estimated fair value on a recurring basis during the six months ended June 30, 2011 were as follows:


	Investment securities available for sale
	Privately issued residential mortgage-backed securities			Privately issued commercial mortgage-backed securities			Collateralized debt obligations			Other assets and other liabilities
	(in thousands)
Balance – January 1, 2011	$	1,435,561		$	22,407		$	110,756		$	2,244
Total gains (losses) realized/unrealized:
Included in earnings		(32,071	)(a)		—			—			43,244	(b)
Included in other comprehensive income		99,556	(e)		(1,482	)(e)		7,206	(e)		—
Purchases		—			—			50,790			—
Sales		—			—			(105,643	)		—
Settlements		(196,844	)		(3,692	)		(1,508	)		—
Transfers in and/or out of Level 3 (c)		—			—			—			(32,317	)(d)

Balance – June 30, 2011	$	1,306,202		$	17,233		$	61,601		$	13,171

Changes in unrealized gains (losses) included in earnings related to assets still held at June 30, 2011	$	(32,071	)(a)	$	—		$	—		$	13,139	(b)

(a)

Reported as an other-than-temporary impairment loss in the consolidated statement of income or as gain (loss) on bank investment securities.

(b)

Reported as mortgage banking revenues in the consolidated statement of income and includes the fair value of commitment issuances and expirations.

(c)

The Company’s policy for transfers between fair value levels is to recognize the transfer as of the actual date of the event or change in circumstances that caused the transfer.

(d)

Transfers out of Level 3 consist of interest rate locks transferred to closed loans.

(e)

Reported as net unrealized gains on investment securities in the consolidated statement of comprehensive income.

The Company is required, on a nonrecurring basis, to adjust the carrying value of certain assets or provide valuation allowances related to certain assets using fair value measurements. The more significant of those assets follow.

Investment securities held to maturity

During the three-month periods ended June 30, 2012 and 2011, the Company recognized other-than-temporary impairment losses related to certain collateralized mortgage obligations of $1 million and $2 million, respectively, and during the six-month periods ended June 30, 2012 and 2011, similar other-than-temporary losses of $5 million and $11 million, respectively, were recorded. In accordance with GAAP, the carrying value of such securities was reduced to fair value, with estimated credit losses recognized in earnings and any remaining unrealized loss recognized in accumulated other comprehensive income. The determination of fair value includes use of external and internal valuation sources that, as in the case of privately issued residential mortgage-backed securities, are weighted and averaged when estimating fair value. Due to the presence of significant unobservable inputs that valuation is classified as Level 3. The amortized cost, fair value and impact on the Company’s financial statements of the modeling described herein were not material.

Loans

Loans are generally not recorded at fair value on a recurring basis. Periodically, the Company records nonrecurring adjustments to the carrying value of loans based on fair value measurements for partial charge-offs of the uncollectible portions of those loans. Nonrecurring adjustments also include certain impairment amounts for collateral-dependent loans when establishing the allowance for credit losses. Such amounts are generally based on the fair value of the underlying collateral supporting the loan and, as a result, the carrying value of the loan less the calculated valuation amount does not necessarily represent the fair value of the loan. Real estate collateral is typically valued using appraisals or other indications of value based on recent comparable sales of similar properties or assumptions generally observable in the marketplace and the related nonrecurring fair value measurement adjustments have generally been classified as Level 2, unless significant adjustments have been made to the valuation that are not readily observable by market participants. Estimates of fair value used for other collateral supporting commercial loans generally are based on assumptions not observable in the marketplace and, therefore, such valuations have been classified as Level 3. Loans subject to nonrecurring fair value measurement were $344 million at June 30, 2012 ($234 million and $110 million of which were classified as Level 2 and Level 3, respectively) and $478 million at June 30, 2011 ($324 million and $154 million of which were classified as Level 2 and Level 3, respectively). Changes in fair value recognized for partial charge-offs of loans and loan impairment reserves on loans held by the Company on June 30, 2012 were decreases of $21 million and $34 million for the three- and six-month periods ended June 30, 2012, respectively. Changes in fair value recognized for partial charge-offs of loans and loan impairment reserves on loans held by the Company on June 30, 2011 were decreases of $61 million and $91 million for the three- and six-month periods ended June 30, 2011, respectively.

Assets taken in foreclosure of defaulted loans

Assets taken in foreclosure of defaulted loans are primarily comprised of commercial and residential real property and are generally measured at the lower of cost or fair value less costs to sell. The fair value of the real property is generally determined using appraisals or other indications of value based on recent comparable sales of similar properties or assumptions generally observable in the marketplace, and the related nonrecurring fair value measurement adjustments have generally been classified as Level 2. Assets taken in foreclosure of defaulted loans subject to nonrecurring fair value measurement were not material at June 30, 2012 and 2011.

Significant unobservable inputs to level 3 measurements

The following table presents quantitative information about the significant unobservable inputs used in the fair value measurements for Level 3 assets and liabilities at June 30, 2012:


	Fair value at June 30, 2012		Valuation technique	Unobservable input/assumptions	Range (weighted- average)
Recurring fair value measurements
Privately issued mortgage–backed securities	$	1,080,519	Discounted cash flow	Probability of default	1%-49% (18%)
				Loss severity	32%-75% (49%)
Colateralized debt obligations		55,098	Discounted cash flow	Probability of default	3%-65% (14%)
				Loss severity	100%
Net other assets (liabilities)(a)		34,051	Discounted cash flow	Commitment expirations	0%-69% (18%)

Total level 3 assets, net of liabilities	$	1,169,668

(a)

Other level 3 assets (liabilities) consist of commitments to originate real estate loans.

Sensitivity of fair value measurements to changes in unobservable inputs

An increase (decrease) in the probability of default and loss severity for mortgage-backed securities and collateralized debt obligations backed by trust preferred securities would generally result in a lower (higher) fair value measurement.

An increase (decrease) in the estimate of expirations for commitments to originate residential mortgage loans would generally result in a lower (higher) fair value measurement. Estimated commitment expirations are derived considering loan type, changes in interest rates and remaining length of time until closing.

Disclosures of fair value of financial instruments

With the exception of marketable securities, certain off-balance sheet financial instruments and one-to-four family residential mortgage loans originated for sale, the Company’s financial instruments are not readily marketable and market prices do not exist. The Company, in attempting to comply with the provisions of GAAP that require disclosures of fair value of financial instruments, has not attempted to market its financial instruments to potential buyers, if any exist. Since negotiated prices in illiquid markets depend greatly upon the then present motivations of the buyer and seller, it is reasonable to assume that actual sales prices could vary widely from any estimate of fair value made without the benefit of negotiations. Additionally, changes in market interest rates can dramatically impact the value of financial instruments in a short period of time. Additional information about the assumptions and calculations utilized follows.

The carrying amounts and estimated fair value for financial instrument assets (liabilities) are presented in the following table:


	June 30, 2012
	Carrying amount			Estimated fair value			Level 1		Level 2			Level 3
	(in thousands)
Financial assets:
Cash and cash equivalents	$	1,422,831		$	1,422,831		$	1,343,415	$	79,416		$	—
Interest-bearing deposits at banks		1,069,717			1,069,717			—		1,069,717			—
Trading account assets		544,938			544,938			53,472		491,466			—
Investment securities		7,057,300			7,000,671			108,172		5,598,494			1,294,005
Loans and leases:
Commercial loans and leases		16,395,587			16,146,408			—		—			16,146,408
Commercial real estate loans		24,898,707			24,687,443			—		109,645			24,577,798
Residential real estate loans		9,811,525			9,843,421			—		6,617,925			3,225,496
Consumer loans		11,745,453			11,605,448			—		—			11,605,448
Allowance for credit losses		(917,028	)		—			—		—			—

Loans and leases, net		61,934,244			62,282,720			—		6,727,570			55,555,150
Accrued interest receivable		220,510			220,510			—		220,510			—
Financial liabilities:
Noninterest-bearing deposits	$	(22,854,794	)	$	(22,854,794	)	$	—	$	(22,854,794	)	$	—
Savings deposits and NOW accounts		(33,997,610	)		(33,997,610	)		—		(33,997,610	)		—
Time deposits		(5,330,239	)		(5,360,561	)		—		(5,360,561	)		—
Deposits at Cayman Islands office		(366,164	)		(366,164	)		—		(366,164	)		—
Short-term borrowings		(975,575	)		(975,575	)		—		(975,575	)		—
Long-term borrowings		(5,687,868	)		(5,784,700	)		—		(5,784,700	)		—
Accrued interest payable		(67,523	)		(67,523	)		—		(67,523	)		—
Trading account liabilities		(430,101	)		(430,101	)		—		(430,101	)		—
Other financial instruments:
Commitments to originate real estate loans for sale	$	34,051		$	34,051		$	—	$	—		$	34,051
Commitments to sell real estate loans		(12,857	)		(12,857	)		—		(12,857	)		—
Other credit-related commitments		(127,616	)		(127,616	)		—		—			(127,616	)
Interest rate swap agreements used for interest rate risk management		149,947			149,947			—		149,947			—


	December 31, 2011
	Carrying amount			Estimated fair value
	(in thousands)
Financial assets:
Cash and cash equivalents	$	1,452,397		$	1,452,397
Interest-bearing deposits at banks		154,960			154,960
Trading account assets		561,834			561,834
Investment securities		7,673,154			7,608,008
Loans and leases:
Commercial loans and leases		15,734,436			15,507,342
Commercial real estate loans		24,411,114			24,024,585
Residential real estate loans		7,923,165			7,782,935
Consumer loans		12,027,290			11,869,813
Allowance for credit losses		(908,290	)		—

Loans and leases, net		59,187,715			59,184,675
Accrued interest receivable		222,618			222,618
Financial liabilities:
Noninterest-bearing deposits	$	(20,017,883	)	$	(20,017,883	)
Savings deposits and NOW accounts		(32,913,309	)		(32,913,309	)
Time deposits		(6,107,530	)		(6,133,806	)
Deposits at Cayman Islands office		(355,927	)		(355,927	)
Short-term borrowings		(782,082	)		(782,082	)
Long-term borrowings		(6,686,226	)		(6,720,174	)
Accrued interest payable		(67,900	)		(67,900	)
Trading account liabilities		(434,559	)		(434,559	)
Other financial instruments:
Commitments to originate real estate loans for sale	$	6,923		$	6,923
Commitments to sell real estate loans		(3,498	)		(3,498	)
Other credit-related commitments		(109,828	)		(109,828	)
Interest rate swap agreements used for interest rate risk management		147,302			147,302

The following assumptions, methods and calculations were used in determining the estimated fair value of financial instruments not measured at fair value in the consolidated balance sheet.

Cash and cash equivalents, interest-bearing deposits at banks, agreements to resell securities, short-term borrowings, accrued interest receivable and accrued interest payable

Due to the nature of cash and cash equivalents and the near maturity of interest-bearing deposits at banks, agreements to resell securities, short-term borrowings, accrued interest receivable and accrued interest payable, the Company estimated that the carrying amount of such instruments approximated estimated fair value.

Investment securities

Estimated fair values of investments in readily marketable securities were generally based on quoted market prices. Investment securities that were not readily marketable were assigned amounts based on estimates provided by outside parties or modeling techniques that relied upon discounted calculations of projected cash flows or, in the case of other investment securities, which include capital stock of the Federal Reserve Bank of New York and the Federal Home Loan Bank of New York, at an amount equal to the carrying amount.

Loans and leases

In general, discount rates used to calculate values for loan products were based on the Company’s pricing at the respective period end. A higher discount rate was assumed with respect to estimated cash flows associated with nonaccrual loans. Projected loan cash flows were adjusted for estimated credit losses. However, such estimates made by the Company may not be indicative of assumptions and adjustments that a purchaser of the Company’s loans and leases would seek.

Deposits

Pursuant to GAAP, the estimated fair value ascribed to noninterest-bearing deposits, savings deposits and NOW accounts must be established at carrying value because of the customers’ ability to withdraw funds immediately. Time deposit accounts are required to be revalued based upon prevailing market interest rates for similar maturity instruments. As a result, amounts assigned to time deposits were based on discounted cash flow calculations using prevailing market interest rates based on the Company’s pricing at the respective date for deposits with comparable remaining terms to maturity.

The Company believes that deposit accounts have a value greater than that prescribed by GAAP. The Company feels, however, that the value associated with these deposits is greatly influenced by characteristics of the buyer, such as the ability to reduce the costs of servicing the deposits and deposit attrition which often occurs following an acquisition.

Long-term borrowings

The amounts assigned to long-term borrowings were based on quoted market prices, when available, or were based on discounted cash flow calculations using prevailing market interest rates for borrowings of similar terms and credit risk.

Other credit-related commitments

As described in note 13, in the normal course of business, various commitments and contingent liabilities are outstanding, such as loan commitments, credit guarantees and letters of credit. The Company’s pricing of such financial instruments is based largely on credit quality and relationship, probability of funding and other requirements. Loan commitments often have fixed expiration dates and contain termination and other clauses which provide for relief from funding in the event of significant deterioration in the credit quality of the customer. The rates and terms of the Company’s loan commitments, credit guarantees and letters of credit are competitive with other financial institutions operating in markets served by the Company. The Company believes that the carrying amounts, which are included in other liabilities, are reasonable estimates of the fair value of these financial instruments.

The Company does not believe that the estimated information presented herein is representative of the earnings power or value of the Company. The preceding analysis, which is inherently limited in depicting fair value, also does not consider any value associated with existing customer relationships nor the ability of the Company to create value through loan origination, deposit gathering or fee generating activities.

Many of the estimates presented herein are based upon the use of highly subjective information and assumptions and, accordingly, the results may not be precise. Management believes that fair value estimates may not be comparable between financial institutions due to the wide range of permitted valuation techniques and numerous estimates which must be made. Furthermore, because the disclosed fair value amounts were estimated as of the balance sheet date, the amounts actually realized or paid upon maturity or settlement of the various financial instruments could be significantly different.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258

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-Publisher FASB
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
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Reference 6: http://www.xbrl.org/2003/role/presentationRef
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Reference 7: http://www.xbrl.org/2003/role/presentationRef
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-Name Statement of Financial Accounting Standard (FAS)
-Number 107
-Paragraph 15B
-Subparagraph a, b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
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-Paragraph 44A, 44B
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
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-Paragraph 17-22, 27, 28
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Number 107
-Paragraph 15A
-Subparagraph a-d
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 12: http://www.xbrl.org/2003/role/presentationRef
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-Name Statement of Financial Accounting Standard (FAS)
-Number 157
-Paragraph 32, 33, 34
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 13: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 107
-Paragraph 3, 10, 14, 15
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Commitments and contingencies

6 Months Ended

Jun. 30, 2012

Commitments and contingencies [Abstract]

Commitments and contingencies

13.

Commitments and contingencies

In the normal course of business, various commitments and contingent liabilities are outstanding. The following table presents the Company’s significant commitments. Certain of these commitments are not included in the Company’s consolidated balance sheet.


	June 30, 2012		December 31, 2011
	(in thousands)
Commitments to extend credit
Home equity lines of credit	$	6,369,114		6,393,332
Commercial real estate loans to be sold		134,471		177,982
Other commercial real estate and construction		3,138,855		2,818,071
Residential real estate loans to be sold		771,278		182,474
Other residential real estate		438,197		129,466
Commercial and other		10,004,023		10,442,754
Standby letters of credit		3,811,819		3,930,271
Commercial letters of credit		56,725		44,981
Financial guarantees and indemnification contracts		1,895,755		1,903,254
Commitments to sell real estate loans		1,068,940		635,899

Commitments to extend credit are agreements to lend to customers, generally having fixed expiration dates or other termination clauses that may require payment of a fee. Standby and commercial letters of credit are conditional commitments issued to guarantee the performance of a customer to a third party. Standby letters of credit generally are contingent upon the failure of the customer to perform according to the terms of the underlying contract with the third party, whereas commercial letters of credit are issued to facilitate commerce and typically result in the commitment being funded when the underlying transaction is consummated between the customer and a third party. The credit risk associated with commitments to extend credit and standby and commercial letters of credit is essentially the same as that involved with extending loans to customers and is subject to normal credit policies. Collateral may be obtained based on management’s assessment of the customer’s creditworthiness.

Financial guarantees and indemnification contracts are oftentimes similar to standby letters of credit and include mandatory purchase agreements issued to ensure that customer obligations are fulfilled, recourse obligations associated with sold loans, and other guarantees of customer performance or compliance with designated rules and regulations. Included in financial guarantees and indemnification contracts are loan principal amounts sold with recourse in conjunction with the Company’s involvement in the Fannie Mae Delegated Underwriting and Servicing program. The Company’s maximum credit risk for recourse associated with loans sold under this program totaled approximately $1.8 billion at each of June 30, 2012 and December 31, 2011.

Since many loan commitments, standby letters of credit, and guarantees and indemnification contracts expire without being funded in whole or in part, the contract amounts are not necessarily indicative of future cash flows.

The Company utilizes commitments to sell real estate loans to hedge exposure to changes in the fair value of real estate loans held for sale. Such commitments are considered derivatives and along with commitments to originate real estate loans to be held for sale are generally recorded in the consolidated balance sheet at estimated fair market value.

The Company has an agreement with the Baltimore Ravens of the National Football League whereby the Company obtained the naming rights to a football stadium in Baltimore, Maryland. Under the agreement, the Company is obligated to pay $5 million per year through 2013 and $6 million per year from 2014 through 2017.

The Company also has commitments under long-term operating leases.

The Company reinsures credit life and accident and health insurance purchased by consumer loan customers. The Company also enters into reinsurance contracts with third party insurance companies who insure against the risk of a mortgage borrower’s payment default in connection with certain mortgage loans originated by the Company. When providing reinsurance coverage, the Company receives a premium in exchange for accepting a portion of the insurer’s risk of loss. The outstanding loan principal balances reinsured by the Company were approximately $71 million at June 30, 2012. Assets of subsidiaries providing reinsurance that are available to satisfy claims totaled approximately $42 million at June 30, 2012. The amounts noted above are not necessarily indicative of losses which may ultimately be incurred. Such losses are expected to be substantially less because most loans are repaid by borrowers in accordance with the original loan terms. Management believes that any reinsurance losses that may be payable by the Company will not be material to the Company’s consolidated financial position.

The Company is contractually obligated to repurchase previously sold residential real estate loans that do not ultimately meet investor sale criteria related to underwriting procedures or loan documentation. When required to do so, the Company may reimburse loan purchasers for losses incurred or may repurchase certain loans. The Company reduces residential mortgage banking revenues by an estimate for losses related to its obligations to loan purchasers. The amount of those charges is based on the volume of loans sold, the level of reimbursement requests received from loan purchasers and estimates of losses that may be associated with previously sold loans. At June 30, 2012, management believes that any remaining liability arising out of the Company’s obligation to loan purchasers is not material to the Company’s consolidated financial position.

M&T and its subsidiaries are subject in the normal course of business to various pending and threatened legal proceedings in which claims for monetary damages are asserted. Management, after consultation with legal counsel, does not anticipate that the aggregate ultimate liability arising out of litigation pending or threatened against M&T or its subsidiaries will be material to the Company’s consolidated financial position. On an on-going basis the Company assesses its liabilities and contingencies in connection with such legal proceedings. For those matters where it is probable that the Company will incur losses and the amounts of the losses can be reasonably estimated, the Company records an expense and corresponding liability in its consolidated financial statements. To the extent the pending or threatened litigation could result in exposure in excess of that liability, the amount of such excess is not currently estimable. Although not considered probable, the range of reasonably possible losses for such matters in the aggregate, beyond the existing recorded liability, was between $0 and $40 million. Although the Company does not believe that the outcome of pending litigations will be material to the Company’s consolidated financial position, it cannot rule out the possibility that such outcomes will be material to the consolidated results of operations for a particular reporting period in the future.

- Definition

The entire disclosure for commitments and contingencies.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6449706&loc=d3e16207-108621

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Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 5
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Segment information

6 Months Ended

Jun. 30, 2012

Segment information [Abstract]

Segment information

14.

Segment information

Reportable segments have been determined based upon the Company’s internal profitability reporting system, which is organized by strategic business unit. Certain strategic business units have been combined for segment information reporting purposes where the nature of the products and services, the type of customer and the distribution of those products and services are similar. The reportable segments are Business Banking, Commercial Banking, Commercial Real Estate, Discretionary Portfolio, Residential Mortgage Banking and Retail Banking.

The financial information of the Company’s segments was compiled utilizing the accounting policies described in note 22 to the Company’s consolidated financial statements as of and for the year ended December 31, 2011. The management accounting policies and processes utilized in compiling segment financial information are highly subjective and, unlike financial accounting, are not based on authoritative guidance similar to GAAP. As a result, the financial information of the reported segments is not necessarily comparable with similar information reported by other financial institutions. As also described in note 22 to the Company’s 2011 consolidated financial statements, neither goodwill nor core deposit and other intangible assets (and the amortization charges associated with such assets) resulting from acquisitions of financial institutions have been allocated to the Company’s reportable segments, but are included in the “All Other” category. The Company does, however, assign such intangible assets to business units for purposes of testing for impairment.

Information about the Company’s segments is presented in the following table:


	Three months ended June 30
	2012									2011
	Total revenues (a)			Inter- segment revenues			Net income (loss)			Total revenues (a)		Inter- segment revenues			Net income (loss)
	(in thousands)
Business Banking	$	109,318			1,099			37,085			104,012		971			26,584
Commercial Banking		248,754			1,731			99,623			228,564		1,190			95,111
Commercial Real Estate		168,083			396			80,498			134,066		448			65,058
Discretionary Portfolio		(11,807	)		(20,616	)		(14,757	)		112,383		(4,419	)		58,362
Residential Mortgage Banking		109,995			37,455			25,994			58,305		8,699			5,966
Retail Banking		313,994			3,198			58,191			311,484		2,967			54,645
All Other		101,296			(23,263	)		(53,254	)		139,044		(9,856	)		16,632

Total	$	1,039,633			—			233,380			1,087,858		—			322,358


	Six months ended June 30
	2012									2011
	Total revenues (a)			Inter- segment revenues			Net income (loss)			Total revenues (a)		Inter- segment revenues			Net income (loss)
	(in thousands)
Business Banking	$	221,294			2,191			72,418		$	203,789		1,933			52,884
Commercial Banking		486,216			3,271			202,719			442,176		2,356			183,442
Commercial Real Estate		321,627			829			149,129			259,372		804			114,068
Discretionary Portfolio		(12,967	)		(35,397	)		(22,998	)		154,866		(12,206	)		74,489
Residential Mortgage Banking		203,037			71,896			49,511			116,153		19,006			10,751
Retail Banking		620,842			6,090			106,848			606,532		5,954			107,371
All Other		196,696			(48,880	)		(117,784	)		188,194		(17,847	)		(14,374	)

Total	$	2,036,745			—			439,843		$	1,971,082		—			528,631


	Average total assets
	Six months ended June 30				Year ended December 31
	2012		2011		2011
	(in millions)
Business Banking	$	4,932		4,861		5,192
Commercial Banking		19,455		16,856		17,650
Commercial Real Estate		16,316		14,227		15,025
Discretionary Portfolio		16,136		14,012		14,170
Residential Mortgage Banking		2,200		1,940		1,958
Retail Banking		11,791		11,776		11,940
All Other		8,226		6,590		8,042

Total	$	79,056		70,262		73,977

(a)

Total revenues are comprised of net interest income and other income. Net interest income is the difference between taxable-equivalent interest earned on assets and interest paid on liabilities by a segment and a funding charge (credit) based on the Company’s internal funds transfer and allocation methodology. Segments are charged a cost to fund any assets (e.g. loans) and are paid a funding credit for any funds provided (e.g. deposits). The taxable-equivalent adjustment aggregated $6,645,000 and $6,468,000 for the three-month periods ended June 30, 2012 and 2011, respectively, and $13,350,000 and $12,795,000 for the six-month periods ended June 30, 2012 and 2011, respectively, and is eliminated in “All Other” total revenues. Intersegment revenues are included in total revenues of the reportable segments. The elimination of intersegment revenues is included in the determination of “All Other” total revenues.

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 34
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8981-108599

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 41
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9038-108599

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8971-108599

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8595-108599

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8380-108599

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8933-108599

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 26
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8844-108599

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
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-Paragraph 35
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8984-108599

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 40
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9031-108599

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 42
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9054-108599

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8538-108599

Reference 12: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
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Reference 13: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 31
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8924-108599

Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 30
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8906-108599

Reference 15: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 131
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Relationship with Bayview Lending Group LLC and Bayview Financial Holdings, L.P.

6 Months Ended

Jun. 30, 2012

Relationship With Other Entities [Abstract]

Relationship with Bayview Lending Group LLC and Bayview Financial Holdings, L.P.

15.

Relationship with Bayview Lending Group LLC and Bayview Financial Holdings, L.P.

M&T holds a 20% interest in Bayview Lending Group LLC (“BLG”), a privately-held commercial mortgage lender. M&T recognizes income or loss from BLG using the equity method of accounting. The carrying value of that investment was $104 million at June 30, 2012.

Bayview Financial Holdings, L.P. (together with its affiliates, “Bayview Financial”), a privately-held specialty mortgage finance company, is BLG’s majority investor. In addition to their common investment in BLG, the Company and Bayview Financial conduct other business activities with each other. The Company has obtained loan servicing rights for small-balance commercial mortgage loans from BLG and Bayview Financial having outstanding principal balances of $4.2 billion and $4.4 billion at June 30, 2012 and December 31, 2011, respectively. Amounts recorded as capitalized servicing assets for such loans totaled $12 million at June 30, 2012 and $16 million at December 31, 2011. In addition, capitalized servicing rights at June 30, 2012 and December 31, 2011 also included $3 million and $5 million, respectively, for servicing rights that were obtained from Bayview Financial related to residential mortgage loans with outstanding principal balances of $2.9 billion at June 30, 2012 and $3.1 billion at December 31, 2011. The Company sub-services residential mortgage loans for Bayview Financial having outstanding principal balances totaling $12.3 billion and $13.1 billion at June 30, 2012 and December 31, 2011. Revenues from servicing residential and small-balance commercial mortgage loans obtained from BLG and Bayview Financial were $11 million and $10 million for the three months ended June 30, 2012 and 2011, respectively, and $23 million and $21 million for the six months ended June 30, 2012 and 2011, respectively. In addition, at June 30, 2012 and December 31, 2011, the Company held $12 million and $15 million, respectively, of collateralized mortgage obligations in its available-for-sale investment securities portfolio that were securitized by Bayview Financial. Finally, the Company held $255 million and $269 million of similar investment securities in its held-to-maturity portfolio at June 30, 2012 and December 31, 2011, respectively.

Significant Accounting Policies (Policies)	6 Months Ended
Significant Accounting Policies (Policies)	Jun. 30, 2012
Significant accounting policies [Abstract]
Consolidation	The consolidated financial statements of M&T Bank Corporation (“M&T”) and subsidiaries (“the Company”) were compiled in accordance with generally accepted accounting principles (“GAAP”) using the accounting policies set forth in note 1 of Notes to Financial Statements included in the 2011 Annual Report. In the opinion of management, all adjustments necessary for a fair presentation have been made and were all of a normal recurring nature.

- Definition

Disclosure of accounting policy regarding (1) the principles it follows in consolidating or combining the separate financial statements, including the principles followed in determining the inclusion or exclusion of subsidiaries or other entities in the consolidated or combined financial statements and (2) its treatment of interests (for example, common stock, a partnership interest or other means of exerting influence) in other entities, for example consolidation or use of the equity or cost methods of accounting. The accounting policy may also address the accounting treatment for intercompany accounts and transactions, noncontrolling interest, and the income statement treatment in consolidation for issuances of stock by a subsidiary.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-URI http://asc.fasb.org/subtopic&trid=2197480

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 40
-Section 45
-URI http://asc.fasb.org/section&trid=2197723

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-URI http://asc.fasb.org/subtopic&trid=2196966

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 325
-SubTopic 20
-URI http://asc.fasb.org/subtopic&trid=2197087

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6367646&loc=d3e18780-107790

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.3A-02)
-URI http://asc.fasb.org/extlink&oid=6959686&loc=d3e355033-122828

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 45
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=16385135&loc=d3e33801-111570

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=18733093&loc=d3e5614-111684

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 46R
-Paragraph 4
-Subparagraph c
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Principles Board Opinion (APB)
-Number 18
-Paragraph 5, 6, 16-19
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number 96-16
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 12: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 46R
-Paragraph 4
-Subparagraph d
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 13: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Principles Board Opinion (APB)
-Number 18
-Paragraph 20
-Subparagraph a(2)
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 2-6
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 15: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number 97-2
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 16: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph k
-Article 1

Reference 17: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 140
-Paragraph 46
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 18: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02, 03
-Article 3A

Reference 19: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 46R
-Paragraph 14, 15
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Acquisitions (Tables)

6 Months Ended

Jun. 30, 2012

Acquisitions [Abstract]

Consideration paid for acquired identifiable assets and liabilities


	(in thousands)
Purchase price:
Value of:
Common shares issued (4,694,486 shares)	$	405,557
Preferred stock purchased from U.S. Treasury		330,000

Total purchase price		735,557

Identifiable assets:
Cash and due from banks		178,940
Interest-bearing deposits at banks		2,606,265
Other short-term investments		57,817
Investment securities		510,390
Loans and leases		6,410,430
Core deposit and other intangibles		112,094
Other assets		969,106

Total identifiable assets		10,845,042

Liabilities:
Deposits		8,864,161
Short-term borrowings		147,752
Long-term borrowings		600,830
Other liabilities		431,812

Total liabilities		10,044,555

Net gain resulting from acquisition	$	64,930

Pro forma information


	Pro forma Three months ended June 30, 2011		Pro forma Six months ended June 30, 2011
	(in thousands)
Total revenues (a)	$	1,166,694		2,208,188
Net income		309,527		480,948

(a)

Represents net interest income plus other income.

Summary of merger-related expenses

A summary of merger-related expenses included in the consolidated statement of income follows:


	Three months ended				Six months ended
	June 30, 2012		June 30, 2011		June 30, 2012		June 30, 2011
	(in thousands)
Salaries and employee benefits	$	3,024		15,305		4,997		15,312
Equipment and net occupancy		—		25		15		104
Printing, postage and supplies		—		318		—		465
Other costs of operations		4,127		21,348		4,867		25,410

	$	7,151		36,996		9,879		41,291

- Definition

Tabular disclosure of pro forma results of operations for a material business acquisition or series of individually immaterial business acquisitions that are material in the aggregate.

+ References + Details

Investment securities (Tables)

6 Months Ended

Jun. 30, 2012

Investment securities [Abstract]

Amortized cost and estimated fair value of investment securities


	Amortized cost		Gross unrealized gains		Gross unrealized losses		Estimated fair value
	(in thousands)
June 30, 2012
Investment securities available for sale:
U.S. Treasury and federal agencies	$	55,484		1,115		—	$	56,599
Obligations of states and political subdivisions		34,007		569		8		34,568
Mortgage-backed securities:
Government issued or guaranteed		3,840,610		218,117		227		4,058,500
Privately issued residential		1,252,709		5,254		189,571		1,068,392
Privately issued commercial		13,048		—		921		12,127
Collateralized debt obligations		43,749		13,079		1,730		55,098
Other debt securities		158,153		2,034		31,258		128,929
Equity securities		112,337		10,926		3,422		119,841

		5,510,097		251,094		227,137		5,534,054

Investment securities held to maturity:
Obligations of states and political subdivisions		187,936		8,375		30		196,281
Mortgage-backed securities:
Government issued or guaranteed		733,912		31,929		—		765,841
Privately issued		255,291		317		97,220		158,388
Other debt securities		11,326		—		—		11,326

		1,188,465		40,621		97,250		1,131,836

Other securities		334,781		—		—		334,781

Total	$	7,033,343		291,715		324,387	$	7,000,671

December 31, 2011
Investment securities available for sale:
U.S. Treasury and federal agencies	$	69,468		1,255		—	$	70,723
Obligations of states and political subdivisions		39,518		771		20		40,269
Mortgage-backed securities:
Government issued or guaranteed		4,344,116		177,392		275		4,521,233
Privately issued residential		1,369,371		6,373		239,488		1,136,256
Privately issued commercial		17,679		—		2,650		15,029
Collateralized debt obligations		43,834		11,154		2,488		52,500
Other debt securities		216,700		4,588		44,443		176,845
Equity securities		211,737		8,468		4,500		215,705

		6,312,423		210,001		293,864		6,228,560

Investment securities held to maturity:
Obligations of states and political subdivisions		188,680		9,141		28		197,793
Mortgage-backed securities:
Government issued or guaranteed		608,533		24,881		—		633,414
Privately issued		268,642		—		99,140		169,502
Other debt securities		11,853		—		—		11,853

		1,077,708		34,022		99,168		1,012,562

Other securities		366,886		—		—		366,886

Total	$	7,757,017		244,023		393,032	$	7,608,008

Changes in credit losses associated with debt securities for which other-than-temporary impairment losses


	Three months ended June 30
	2012			2011
	(in thousands)
Beginning balance	$	267,473			322,719
Additions for credit losses not previously recognized		16,173			26,530
Reductions for increases in cash flows		—			(4,881	)
Reductions for realized losses		(19,449	)		(46,227	)

Ending balance	$	264,197			298,141


	Six months ended June 30
	2012			2011
	(in thousands)
Beginning balance	$	285,399			327,912
Additions for credit losses not previously recognized		27,659			42,571
Reductions for increases in cash flows		—			(5,020	)
Reductions for realized losses		(48,861	)		(67,322	)

Ending balance	$	264,197			298,141

Amortized cost and estimated fair value of debt securities by contractual maturity


	Amortized cost		Estimated fair value
	(in thousands)
Debt securities available for sale:
Due in one year or less	$	33,314		33,367
Due after one year through five years		40,715		42,082
Due after five years through ten years		11,098		11,886
Due after ten years		206,266		187,859

		291,393		275,194
Mortgage-backed securities available for sale		5,106,367		5,139,019

	$	5,397,760		5,414,213

Debt securities held to maturity:
Due in one year or less	$	30,983		31,166
Due after one year through five years		40,576		42,599
Due after five years through ten years		114,797		120,839
Due after ten years		12,906		13,003

		199,262		207,607
Mortgage-backed securities held to maturity		989,203		924,229

	$	1,188,465		1,131,836

Investment securities in continuous unrealized loss position


	Less than 12 months					12 months or more
	Fair value		Unrealized losses			Fair value		Unrealized losses
	(in thousands)
June 30, 2012
Investment securities available for sale:
Obligations of states and political subdivisions	$	171		(1	)		678		(7	)
Mortgage-backed securities:
Government issued or guaranteed		15,936		(70	)		9,951		(157	)
Privately issued residential		126,139		(1,861	)		841,748		(187,710	)
Privately issued commercial		—		—			12,127		(921	)
Collateralized debt obligations		3,106		(39	)		5,349		(1,691	)
Other debt securities		16,858		(2,053	)		74,206		(29,205	)
Equity securities		8,118		(1,389	)		2,193		(2,033	)

		170,328		(5,413	)		946,252		(221,724	)

Investment securities held to maturity:
Obligations of states and political subdivisions		5,598		(23	)		169		(7	)
Privately issued mortgage-backed securities		—		—			157,659		(97,220	)

		5,598		(23	)		157,828		(97,227	)

Total	$	175,926		(5,436	)		1,104,080		(318,951	)

December 31, 2011
Investment securities available for sale:
Obligations of states and political subdivisions	$	—		—			1,228		(20	)
Mortgage-backed securities:
Government issued or guaranteed		38,492		(190	)		6,017		(85	)
Privately issued residential		297,133		(14,188	)		751,077		(225,300	)
Privately issued commercial		—		—			15,029		(2,650	)
Collateralized debt obligations		2,871		(335	)		4,863		(2,153	)
Other debt securities		72,637		(9,883	)		73,635		(34,560	)
Equity securities		9,883		(4,500	)		—		—

		421,016		(29,096	)		851,849		(264,768	)

Investment securities held to maturity:
Obligations of states and political subdivisions		3,084		(4	)		1,430		(24	)
Privately issued mortgage-backed securities		1,883		(592	)		167,139		(98,548	)

		4,967		(596	)		168,569		(98,572	)

Total	$	425,983		(29,692	)		1,020,418		(363,340	)

Loans and leases and the allowance for credit losses (Tables)

6 Months Ended

Jun. 30, 2012

Loans and leases and the allowance for credit losses [Abstract]

Outstanding principal balance and the carrying amount of loans that is included in the consolidated balance sheet


	June 30, 2012		December 31, 2011
	(in thousands)
Outstanding principal balance	$	8,097,216		9,203,366
Carrying amount:
Commercial, financial, leasing, etc.		1,216,711		1,331,198
Commercial real estate		3,222,688		3,879,518
Residential real estate		814,288		915,371
Consumer		1,834,751		2,033,700

	$	7,088,438		8,159,787

Summary of changes in accretable yield for acquired loans


	Three months ended June 30, 2012
	Purchased impaired			Other acquired			Total
	(in thousands)
Balance at beginning of period	$	22,565			747,466			770,031
Interest income		(9,621	)		(80,249	)		(89,870	)
Reclassifications from (to) nonaccretable balance, net		42,655			97,165			139,820
Other (a)		—			(31,221	)		(31,221	)

Balance at end of period	$	55,599			733,161			788,760


	Six months ended June 30, 2012
	Purchased impaired			Other acquired			Total
	(in thousands)
Balance at beginning of period	$	30,805			807,960			838,765
Interest income		(17,285	)		(153,972	)		(171,257	)
Reclassifications from (to) nonaccretable balance, net		42,079			98,165			140,244
Other (a)		—			(18,992	)		(18,992	)

Balance at end of period	$	55,599			733,161			788,760

(a)

Other changes in expected cash flows including changes in interest rates and prepayments.

Summary of current, past due and nonaccrual loans

A summary of current, past due and nonaccrual loans as of June 30, 2012 and December 31, 2011 were as follows:


	Current		30-89 Days past due		90 Days or more past due and accruing				Purchased impaired (b)		Nonaccrual		Total
	Current		30-89 Days past due		Non- acquired		Acquired (a)		Purchased impaired (b)		Nonaccrual		Total
	(in thousands)
June 30, 2012
Commercial, financial, leasing, etc.	$	16,138,169		73,581		1,455		12,402		16,424		153,556		16,395,587
Real estate:
Commercial		20,854,618		128,489		10,128		49,038		164,855		173,278		21,380,406
Residential builder and developer		761,655		47,065		2,213		18,330		264,163		240,248		1,333,674
Other commercial construction		2,051,194		16,174		4,352		23,158		63,446		26,303		2,184,627
Residential		8,563,870		252,076		251,750		41,047		47,135		174,937		9,330,815
Residential Alt-A		355,574		24,221		—		—		—		100,915		480,710
Consumer:
Home equity lines and loans		6,384,785		41,795		—		15,263		4,381		54,509		6,500,733
Automobile		2,490,590		34,961		—		261		—		24,482		2,550,294
Other		2,628,257		38,085		4,700		2,988		296		20,100		2,694,426

Total	$	60,228,712		656,447		274,598		162,487		560,700		968,328		62,851,272


	Current		30-89 Days past due		90 Days or more past due and accruing				Purchased impaired (b)		Nonaccrual		Total
	Current		30-89 Days past due		Non- acquired		Acquired (a)		Purchased impaired (b)		Nonaccrual		Total
December 31, 2011
Commercial, financial, leasing, etc.	$	15,493,803		37,112		7,601		8,560		23,762		163,598		15,734,436
Real estate:
Commercial		19,658,761		172,641		9,983		54,148		192,804		171,111		20,259,448
Residential builder and developer		845,680		49,353		13,603		21,116		297,005		281,576		1,508,333
Other commercial construction		2,393,304		41,049		968		23,582		78,105		106,325		2,643,333
Residential		6,626,182		256,017		250,472		37,982		56,741		172,681		7,400,075
Residential Alt-A		383,834		34,077		—		—		—		105,179		523,090
Consumer:
Home equity lines and loans		6,570,675		43,516		—		15,409		4,635		47,150		6,681,385
Automobile		2,644,330		48,342		—		601		—		26,835		2,720,108
Other		2,551,225		43,547		5,249		2,340		310		23,126		2,625,797

Total	$	57,167,794		725,654		287,876		163,738		653,362		1,097,581		60,096,005

(a)

Acquired loans that were recorded at fair value at acquisition date. This category does not include purchased impaired loans that are presented separately.

(b)

Accruing loans that were impaired at acquisition date and were recorded at fair value.

Changes in the allowance for credit losses

Changes in the allowance for credit losses for the three months ended June 30, 2012 were as follows:


	Commercial, Financial, Leasing, etc.			Real Estate
	Commercial, Financial, Leasing, etc.			Commercial			Residential			Consumer			Unallocated		Total
	(in thousands)
Beginning balance	$	239,273			356,554			97,301			142,912			72,966		909,006
Provision for credit losses		19,103			(3,309	)		5,587			38,427			192		60,000
Net charge-offs
Charge-offs		(16,078	)		(13,056	)		(11,407	)		(23,621	)		—		(64,162	)
Recoveries		2,430			1,332			1,788			6,634			—		12,184

Net charge-offs		(13,648	)		(11,724	)		(9,619	)		(16,987	)		—		(51,978	)

Ending balance	$	244,728			341,521			93,269			164,352			73,158		917,028

Changes in the allowance for credit losses for the three months ended June 30, 2011 were as follows:


	Commercial, Financial, Leasing, etc.			Real Estate
	Commercial, Financial, Leasing, etc.			Commercial			Residential			Consumer			Unallocated			Total
	(in thousands)
Beginning balance	$	215,659			391,107			87,526			137,351			72,060			903,703
Provision for credit losses		6,870			22,735			13,654			19,852			(111	)		63,000
Net charge-offs
Charge-offs		(14,923	)		(15,915	)		(15,872	)		(24,940	)		—			(71,650	)
Recoveries		2,273			3,184			2,033			5,046			—			12,536

Net charge-offs		(12,650	)		(12,731	)		(13,839	)		(19,894	)		—			(59,114	)

Ending balance	$	209,879			401,111			87,341			137,309			71,949			907,589

Changes in the allowance for credit losses for the six months ended June 30, 2012 were as follows:


	Commercial, Financial, Leasing, etc.			Real Estate
	Commercial, Financial, Leasing, etc.			Commercial			Residential			Consumer			Unallocated		Total
	(in thousands)
Beginning balance	$	234,022			367,637			91,915			143,121			71,595		908,290
Provision for credit losses		29,224			(5,569	)		21,817			61,965			1,563		109,000
Net charge-offs
Charge-offs		(24,115	)		(23,596	)		(24,125	)		(52,602	)		—		(124,438	)
Recoveries		5,597			3,049			3,662			11,868			—		24,176

Net charge-offs		(18,518	)		(20,547	)		(20,463	)		(40,734	)		—		(100,262	)

Ending balance	$	244,728			341,521			93,269			164,352			73,158		917,028

Changes in the allowance for credit losses for the six months ended June 30, 2011 were as follows:


	Commercial, Financial, Leasing, etc.			Real Estate
	Commercial, Financial, Leasing, etc.			Commercial			Residential			Consumer			Unallocated		Total
	(in thousands)
Beginning balance	$	212,579			400,562			86,351			133,067			70,382		902,941
Provision for credit losses		21,812			37,510			29,495			47,616			1,567		138,000
Net charge-offs
Charge-offs		(28,950	)		(40,494	)		(32,039	)		(53,261	)		—		(154,744	)
Recoveries		4,438			3,533			3,534			9,887			—		21,392

Net charge-offs		(24,512	)		(36,961	)		(28,505	)		(43,374	)		—		(133,352	)

Ending balance	$	209,879			401,111			87,341			137,309			71,949		907,589

Impaired loans and leases


	June 30, 2012						December 31, 2011
	Recorded investment		Unpaid principal balance		Related allowance		Recorded investment		Unpaid principal balance		Related allowance
	(in thousands)
With an allowance recorded:
Commercial, financial, leasing, etc.	$	118,670		139,477		39,134		118,538		145,510		48,674
Real estate:
Commercial		116,765		148,232		19,323		102,886		128,456		17,651
Residential builder and developer		135,172		243,663		33,490		159,293		280,869		52,562
Other commercial construction		81,077		89,410		12,404		20,234		24,639		3,836
Residential		108,167		127,032		4,332		101,882		119,498		4,420
Residential Alt-A		136,995		150,849		23,000		150,396		162,978		25,000
Consumer:
Home equity lines and loans		11,707		13,327		2,986		9,385		10,670		2,306
Automobile		51,649		51,649		15,324		53,710		53,710		11,468
Other		10,578		10,578		4,403		8,401		8,401		2,084

		770,780		974,217		154,396		724,725		934,731		168,001

With no related allowance recorded:
Commercial, financial, leasing, etc.		43,179		52,473		—		53,104		60,778		—
Real estate:
Commercial		62,529		79,604		—		71,636		91,118		—
Residential builder and developer		110,954		128,880		—		133,156		177,277		—
Other commercial construction		4,976		9,386		—		86,652		89,862		—
Residential		17,990		24,930		—		19,686		25,625		—
Residential Alt-A		33,588		62,379		—		34,356		60,942		—

		273,216		357,652		—		398,590		505,602		—

Total:
Commercial, financial, leasing, etc.		161,849		191,950		39,134		171,642		206,288		48,674
Real estate:
Commercial		179,294		227,836		19,323		174,522		219,574		17,651
Residential builder and developer		246,126		372,543		33,490		292,449		458,146		52,562
Other commercial construction		86,053		98,796		12,404		106,886		114,501		3,836
Residential		126,157		151,962		4,332		121,568		145,123		4,420
Residential Alt-A		170,583		213,228		23,000		184,752		223,920		25,000
Consumer:
Home equity lines and loans		11,707		13,327		2,986		9,385		10,670		2,306
Automobile		51,649		51,649		15,324		53,710		53,710		11,468
Other		10,578		10,578		4,403		8,401		8,401		2,084

Total	$	1,043,996		1,331,869		154,396		1,123,315		1,440,333		168,001

Interest income recognized on loans


	Three months ended June 30, 2012						Three months ended June 30, 2011
			Interest income recognized						Interest income recognized
	Average recorded investment		Total		Cash basis		Average recorded investment		Total		Cash basis
	(in thousands)
Commercial, financial, leasing, etc.	$	161,311		743		743		162,827		679		666
Real estate:
Commercial		180,199		1,238		1,238		194,508		513		483
Residential builder and developer		262,254		385		252		308,709		314		112
Other commercial construction		109,037		4,840		4,840		93,980		187		150
Residential		127,258		1,315		810		97,317		1,029		565
Residential Alt-A		174,181		1,753		527		199,056		1,991		410
Consumer:
Home equity lines and loans		11,237		164		46		12,069		189		23
Automobile		52,200		871		190		58,650		984		292
Other		9,877		106		47		3,544		55		13

Total	$	1,087,554		11,415		8,693		1,130,660		5,941		2,714


	Six months ended June 30, 2012						Six months ended June 30, 2011
			Interest income recognized						Interest income recognized
	Average recorded investment		Total		Cash basis		Average recorded investment		Total		Cash basis
	(in thousands)
Commercial, financial, leasing, etc.	$	164,779		1,152		1,152		167,456		1,672		1,654
Real estate:
Commercial		179,213		1,556		1,556		191,472		895		822
Residential builder and developer		271,903		726		431		317,054		839		240
Other commercial construction		107,151		5,010		5,010		103,751		697		471
Residential		126,880		2,657		1,688		90,813		2,026		1,140
Residential Alt-A		177,623		3,596		1,073		202,339		3,986		961
Consumer:
Home equity lines and loans		10,593		330		88		12,098		349		48
Automobile		52,799		1,769		368		58,655		1,968		588
Other		9,080		199		86		3,304		112		19

Total	$	1,100,021		16,995		11,452		1,146,942		12,544		5,943

Summary of Loan grades


			Real Estate
	Commercial, Financial, Leasing, etc.		Commercial		Residential Builder and Developer		Other Commercial Construction
	(in thousands)
June 30, 2012
Pass	$	15,499,951		20,403,488		989,903		1,903,981
Criticized accrual		742,080		803,640		103,523		254,343
Criticized nonaccrual		153,556		173,278		240,248		26,303

Total	$	16,395,587		21,380,406		1,333,674		2,184,627

December 31, 2011
Pass	$	14,869,636		19,089,252		1,085,970		2,254,609
Criticized accrual		701,202		999,085		140,787		282,399
Criticized nonaccrual		163,598		171,111		281,576		106,325

Total	$	15,734,436		20,259,448		1,508,333		2,643,333

Loans and leases receivable allowance by impairment methodology


	Commercial, Financial, Leasing, etc.		Real Estate
	Commercial, Financial, Leasing, etc.		Commercial		Residential		Consumer		Total
	(in thousands)
June 30, 2012
Individually evaluated for impairment	$	38,961		64,143		27,258		22,713	$	153,075
Collectively evaluated for impairment		205,594		275,671		62,182		141,159		684,606
Purchased impaired		173		1,707		3,829		480		6,189

Allocated	$	244,728		341,521		93,269		164,352		843,870

Unallocated										73,158

Total									$	917,028

December 31, 2011
Individually evaluated for impairment	$	48,517		71,784		29,420		15,858	$	165,579
Collectively evaluated for impairment		185,048		291,271		60,742		126,613		663,674
Purchased impaired		457		4,582		1,753		650		7,442

Allocated	$	234,022		367,637		91,915		143,121		836,695

Unallocated										71,595

Total									$	908,290

Loans and leases receivable net of deferred income by impairment methodology


	Commercial, Financial,		Real Estate
	Leasing, etc.		Commercial		Residential		Consumer		Total
	(in thousands)
June 30, 2012
Individually evaluated for impairment	$	161,669		504,281		295,314		73,934	$	1,035,198
Collectively evaluated for impairment		16,217,494		23,901,962		9,469,076		11,666,842		61,255,374
Purchased impaired		16,424		492,464		47,135		4,677		560,700

Total	$	16,395,587		24,898,707		9,811,525		11,745,453	$	62,851,272

December 31, 2011
Individually evaluated for impairment	$	171,442		561,615		306,320		71,496	$	1,110,873
Collectively evaluated for impairment		15,539,232		23,281,585		7,560,104		11,950,849		58,331,770
Purchased impaired		23,762		567,914		56,741		4,945		653,362

Total	$	15,734,436		24,411,114		7,923,165		12,027,290	$	60,096,005

Loan modification activities that were considered troubled debt restructurings

The tables below summarize the Company’s loan modification activities that were considered troubled debt restructurings for the three months ended June 30, 2012 and 2011:


			Recorded investment				Financial effects of modification
Three months ended June 30, 2012	Number		Pre- modification		Post- modification		Recorded investment (a)			Interest (b)
	(dollars in thousands)
Commercial, financial, leasing, etc.
Principal deferral		9	$	10,392	$	9,061	$	(1,331	)	$	—
Other		2		1,995		1,954		(41	)		—
Real estate:
Commercial
Principal deferral		1		2,011		1,999		(12	)		—
Interest rate reduction		1		383		430		47			(89	)
Combination of concession types		4		1,210		1,231		21			(256	)
Residential builder and developer
Principal deferral		3		2,503		2,503		—			—
Other commercial construction
Principal deferral		3		60,888		60,898		10			—
Residential
Principal deferral		7		1,059		1,087		28			—
Combination of concession types		11		2,049		2,098		49			(65	)
Residential Alt-A
Principal deferral		1		153		158		5			—
Combination of concession types		7		1,509		1,543		34			(44	)
Consumer:
Home equity lines and loans
Principal deferral		9		734		734		—			—
Combination of concession types		4		480		480		—			(123	)
Automobile
Principal deferral		196		2,700		2,700		—			—
Interest rate reduction		3		20		20		—			(1	)
Other		21		152		152		—			—
Combination of concession types		77		1,170		1,170		—			(110	)
Other
Principal deferral		7		134		134		—			—
Combination of concession types		18		142		142		—			(22	)

Total		384	$	89,684	$	88,494	$	(1,190	)	$	(710	)

(a)

Financial effects impacting the recorded investment included principal payments or advances, charge-offs and capitalized escrow arrearages.

(b)

Represents the present value of interest rate concessions discounted at the effective rate of the original loan.


			Recorded investment				Financial effects of modification
Three months ended June 30, 2011	Number		Pre- modification		Post- modification		Recorded investment (a)			Interest (b)
	(dollars in thousands)
Commercial, financial, leasing, etc.
Principal deferral		20	$	5,932	$	5,947	$	15		$	—
Combination of concession types		1		1,945		1,945		—			(641	)
Real estate:
Commercial
Principal deferral		9		5,226		5,143		(83	)		—
Residential builder and developer
Principal deferral		3		15,162		14,237		(925	)		—
Other		1		412		412		—			—
Residential
Principal deferral		9		646		622		(24	)		—
Interest rate reduction		3		619		639		20			(13	)
Combination of concession types		29		5,187		5,342		155			(56	)
Residential Alt-A
Principal deferral		1		73		76		3			—
Combination of concession types		6		1,260		1,278		18			(21	)
Consumer:
Home equity lines and loans
Principal deferral		1		69		69		—			—
Combination of concession types		8		719		719		—			(91	)
Automobile
Principal deferral		217		2,845		2,845		—			—
Interest rate reduction		7		87		87		—			(5	)
Other		31		151		151		—			—
Combination of concession types		100		1,139		1,139		—			(80	)
Other
Principal deferral		3		88		88		—			—
Combination of concession types		9		91		91		—			(20	)

Total		458	$	41,651	$	40,830	$	(821	)	$	(927	)

(a)

Financial effects impacting the recorded investment included principal payments or advances, charge-offs and capitalized escrow arrearages.

(b)

Represents the present value of interest rate concessions discounted at the effective rate of the original loan.

The tables below summarize the Company’s loan modification activities that were considered troubled debt restructurings for the six months ended June 30, 2012 and 2011:


			Recorded investment				Financial effects of modification
Six months ended June 30, 2012	Number		Pre- modification		Post- modification		Recorded investment (a)			Interest (b)
	(dollars in thousands)
Commercial, financial, leasing, etc.
Principal deferral		18	$	13,204	$	12,015	$	(1,189	)	$	—
Other		3		2,967		3,052		85			—
Combination of concession types		1		45		44		(1	)		(33	)
Real estate:
Commercial
Principal deferral		3		4,436		4,404		(32	)		—
Interest rate reduction		1		383		430		47			(89	)
Combination of concession types		4		1,210		1,231		21			(256	)
Residential builder and developer
Principal deferral		8		9,325		8,537		(788	)		—
Combination of concession types		2		2,350		2,726		376			—
Other commercial construction
Principal deferral		3		60,888		60,898		10			—
Residential
Principal deferral		22		2,564		2,675		111			—
Combination of concession types		29		4,985		5,105		120			(265	)
Residential Alt-A
Principal deferral		4		550		565		15			—
Combination of concession types		15		2,869		2,937		68			(49	)
Consumer:
Home equity lines and loans
Principal deferral		10		851		851		—			—
Interest rate reduction		1		144		144		—			(6	)
Combination of concession types		6		715		715		—			(147	)
Automobile
Principal deferral		349		4,585		4,585		—			—
Interest rate reduction		7		77		77		—			(5	)
Other		31		171		171		—			—
Combination of concession types		189		2,779		2,779		—			(282	)
Other
Principal deferral		59		781		781		—			—
Interest rate reduction		3		23		23		—			(3	)
Other		9		49		49		—			—
Combination of concession types		52		361		361		—			(58	)

Total		829	$	116,312	$	115,155	$	(1,157	)	$	(1,193	)

(a)

Financial effects impacting the recorded investment included principal payments or advances, charge-offs and capitalized escrow arrearages.

(b)

Represents the present value of interest rate concessions discounted at the effective rate of the original loan.


			Recorded investment				Financial effects of modification
Six months ended June 30, 2011	Number		Pre- modification		Post- modification		Recorded investment (a)			Interest (b)
	(dollars in thousands)
Commercial, financial, leasing, etc.
Principal deferral		33	$	7,281	$	7,281	$	—		$	—
Combination of concession types		1		1,945		1,945		—			(641	)
Real estate:
Commercial
Principal deferral		18		11,851		11,740		(111	)		—
Residential builder and developer
Principal deferral		4		18,586		17,661		(925	)		—
Other		5		116,414		108,806		(7,608	)		—
Combination of concession types		1		798		790		(8	)		—
Other commercial construction
Principal deferral		1		2,275		2,269		(6	)		—
Residential
Principal deferral		12		770		760		(10	)		—
Interest rate reduction		11		1,678		1,718		40			(63	)
Combination of concession types		59		13,094		13,341		247			(813	)
Residential Alt-A
Principal deferral		1		73		76		3			—
Combination of concession types		15		2,862		2,916		54			(231	)
Consumer:
Home equity lines and loans
Principal deferral		1		69		69		—			—
Combination of concession types		10		789		790		1			(127	)
Automobile
Principal deferral		421		6,338		6,338		—			—
Interest rate reduction		11		131		131		—			(8	)
Other		57		258		258		—			—
Combination of concession types		222		4,000		4,000		—			(516	)
Other
Principal deferral		13		162		162		—			—
Other		1		11		11		—			—
Combination of concession types		46		217		217		—			(40	)

Total		943	$	189,602	$	181,279	$	(8,323	)	$	(2,439	)

(a)

Financial effects impacting the recorded investment included principal payments or advances, charge-offs and capitalized escrow arrearages.

(b)

Represents the present value of interest rate concessions discounted at the effective rate of the original loan.

Shareholders' equity (Tables)

6 Months Ended

Jun. 30, 2012

Shareholders' equity [Abstract]

Issued and outstanding preferred stock

Issued and outstanding preferred stock of M&T is presented below:


	Shares issued and outstanding		Carrying value June 30, 2012		Carrying value December 31, 2011
	(dollars in thousands)
Series A (a)(b)
Fixed Rate Cumulative Perpetual Preferred Stock, Series A, $1,000 liquidation preference per share		230,000	$	225,570	$	224,277
Series C (a)(c)
Fixed Rate Cumulative Perpetual Preferred Stock, Series C, $1,000 liquidation preference per share		151,500		142,863		140,308
Series D (d)
Fixed Rate Non-Cumulative Perpetual Preferred Stock, Series D, $10,000 liquidation preference per share		50,000		500,000		500,000

(a)

(b)

On May 18, 2011, M&T redeemed and retired 370,000 shares of Series A Preferred Stock. Accelerated amortization of preferred stock discount associated with the redemption was $11.2 million.

(c)

Shares were assumed in an acquisition and a new Series C Preferred Stock was designated.

(d)

- Definition

Tabular disclosure of an entity's stock, including par or stated value per share, number and dollar amount of share subscriptions, shares authorized, shares issued, shares outstanding, number and dollar amount of shares held in an employee trust, dividend per share, total dividends, share conversion features, par value plus additional paid in capital, the value of treasury stock and other information necessary to a fair presentation, and EPS information. Stock by class includes common, convertible, and preferred stocks which are not redeemable or redeemable solely at the option of the issuer. Includes preferred stock with redemption features that are solely within the control of the issuer and mandatorily redeemable stock if redemption is required to occur only upon liquidation or termination of the reporting entity. If more than one issue is outstanding, state the title of each issue and the corresponding dollar amount; dollar amount of any shares subscribed but unissued and the deduction of subscriptions receivable there from; number of shares authorized, issued, and outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6959260&loc=d3e187085-122770

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 480
-SubTopic 10
-Section S99
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=14643745&loc=d3e177068-122764

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21506-112644

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
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-Paragraph 1
-Subparagraph (SX 210.4-08.(d),(e))
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Reference 7: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Reference 8: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Reference 9: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Reference 10: http://www.xbrl.org/2003/role/presentationRef
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-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21488-112644

Reference 13: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 30
-Article 5

Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 150
-Paragraph 9
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 15: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 29
-Article 5

+ Details

Pension plans and other postretirement benefits (Tables)

6 Months Ended

Jun. 30, 2012

Pension plans and other postretirement benefits [Abstract]

Net periodic benefit cost for defined benefit plans


	Pension benefits						Other postretirement benefits
	Three months ended June 30
	2012			2011			2012		2011
	(in thousands)
Service cost	$	6,875			6,413			159		115
Interest cost on projected benefit obligation		15,418			14,086			919		909
Expected return on plan assets		(17,581	)		(14,563	)		—		—
Amortization of prior service cost		(1,629	)		(1,629	)		10		29
Amortization of net actuarial loss		9,183			5,165			165		18

Net periodic benefit cost	$	12,266			9,472			1,253		1,071


	Pension benefits						Other postretirement benefits
	Six months ended June 30
	2012			2011			2012		2011
	(in thousands)
Service cost	$	14 ,775			11,713			334		240
Interest cost on projected benefit obligation		31,018			26,236			1,869		1,684
Expected return on plan assets		(35,256	)		(27,263	)		—		—
Amortization of prior service cost		(3,279	)		(3,279	)		10		54
Amortization of net actuarial loss		18,583			10,265			265		18

Net periodic benefit cost	$	25,841			17,672			2,478		1,996

- Definition

Tabular disclosure of one or more of the entity's defined benefit pension plans or one or more other defined benefit postretirement plans, separately for pension plans and other postretirement benefit plans including the entity's schedule of fair value of plan assets for defined benefit or other postretirement plans.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e2439-114920

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 158
-Paragraph 4, 7, 16, 20, 21
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5, 6, 7
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Earnings per common share (Tables)

6 Months Ended

Jun. 30, 2012

Earnings per common share [Abstract]

Computations of basic earnings per common share

The computations of basic earnings per common share follow:


	Three months ended June 30						Six months ended June 30
	2012			2011			2012			2011
	(in thousands, except per share)
Income available to common shareholders:
Net income	$	233,380			322,358			439,843			528,631
Less: Preferred stock dividends (a)		(13,362	)		(7,184	)		(26,725	)		(17,682	)
Amortization of preferred stock discount (a)		(1,964	)		(13,531	)		(3,888	)		(16,284	)

Net income available to common equity		218,054			301,643			409,230			494,665
Less: Income attributable to unvested stock-based compensation awards		(3,345	)		(4,479	)		(6,283	)		(7,382	)

Net income available to common shareholders	$	214,709			297,164			402,947			487,283
Weighted-average shares outstanding:
Common shares outstanding (including common stock issuable) and unvested stock-based compensation awards		127,445			124,035			127,301			122,522
Less: Unvested stock-based compensation awards		(1,957	)		(1,854	)		(1,947	)		(1,823	)

Weighted-average shares outstanding		125,488			122,181			125,354			120,699
Basic earnings per common share	$	1.71			2.43			3.21			4.04

(a)

Including impact of not as yet declared cumulative dividends.

Computations of diluted earnings per common share

The computations of diluted earnings per common share follow:


	Three months ended June 30						Six months ended June 30
	2012			2011			2012			2011
	(in thousands, except per share)
Net income available to common equity	$	218,054			301,643			409,230			494,665
Less: Income attributable to unvested stock-based compensation awards		(3,338	)		(4,464	)		(6,272	)		(7,357	)

Net income available to common shareholders	$	214,716			297,179			402,958			487,308
Adjusted weighted-average shares outstanding:
Common and unvested stock-based compensation awards		127,445			124,035			127,301			122,522
Less: Unvested stock-based compensation awards		(1,957	)		(1,854	)		(1,947	)		(1,823	)
Plus: Incremental shares from assumed conversion of stock-based compensation awards and convertible preferred stock		409			615			402			633

Adjusted weighted-average shares outstanding		125,897			122,796			125,756			121,332
Diluted earnings per common share	$	1.71			2.42			3.20			4.02

- Definition

Tabular disclosure of the effect of income (loss) on an entity's diluted earnings per share.

+ References + Details

Comprehensive income (Tables)

6 Months Ended

Jun. 30, 2012

Comprehensive Income [Abstract]

Components of other comprehensive income

The following table displays the components of other comprehensive income (loss):


	Before-tax amount			Income taxes			Net
	(in thousands)
For the six months ended June 30, 2012
Unrealized gains (losses) on investment securities:
Available-for-sale (“AFS”) investment securities with other-than-temporary impairment (“OTTI”):
Unrealized holding losses, net	$	(8,024	)	$	3,149		$	(4,875	)
Less: OTTI charges recognized in net income		(22,304	)		8,754			(13,550	)

Net change for AFS investment securities with OTTI		14,280			(5,605	)		8,675
AFS investment securities – all other:
Unrealized holding gains, net		93,177			(36,535	)		56,642
Less: reclassification adjustment for losses realized in net income		(363	)		145			(218	)

Net change for AFS investment securities – all other		93,540			(36,680	)		56,860
Held-to-maturity (“HTM”) investment securities with OTTI:
Unrealized holding losses, net		(2,848	)		1,118			(1,730	)
Less: reclassification to income of unrealized holding losses		(1,497	)		587			(910	)
Less: OTTI charges recognized in net income		(5,355	)		2,102			(3,253	)

Net change for HTM investment securities with OTTI		4,004			(1,571	)		2,433

Reclassification to income of unrealized holding losses on investment securities previously transferred from AFS to HTM		2,310			(907	)		1,403

Net unrealized gains on investment securities		114,134			(44,763	)		69,371
Reclassification to income for amortization of gains on terminated cash flow hedges		(178	)		66			(112	)
Foreign currency translation adjustment		(208	)		77			(131	)
Defined benefit plans liability adjustment		15,579			(6,115	)		9,464

	$	129,327		$	(50,735	)	$	78,592

For the six months ended June 30, 2011
Unrealized gains (losses) on investment securities:
AFS investment securities with OTTI:
Unrealized holding losses, net	$	(11,227	)	$	4,501		$	(6,726	)
Less: reclassification adjustment for gains realized in net income		3,814			(1,497	)		2,317
Less: OTTI charges recognized in net income		(32,071	)		12,587			(19,484	)

Net change for AFS investment securities with OTTI		17,030			(6,589	)		10,441
AFS investment securities – all other:
Unrealized holding gains, net		77,869			(30,368	)		47,501
Less: reclassification adjustment for gains realized in net income		146,115			(57,257	)		88,858

Net change for AFS investment securities – all other		(68,246	)		26,889			(41,357	)
HTM investment securities with OTTI:
Unrealized holding losses, net		(8,500	)		3,336			(5,164	)
Less: reclassification to income of unrealized holding losses		(12	)		5			(7	)
Less: OTTI charges recognized in net income		(10,500	)		4,121			(6,379	)

Net change for HTM investment securities with OTTI		2,012			(790	)		1,222

Reclassification to income of unrealized holding losses on investment securities previously transferred from AFS to HTM		2,967			(1,165	)		1,802

Net unrealized gains on investment securities		(46,237	)		18,345			(27,892	)
Reclassification to income for amortization of gains on terminated cash flow hedges		(224	)		83			(141	)
Foreign currency translation adjustment		313			(117	)		196
Defined benefit plans liability adjustment		7,058			(2,770	)		4,288

	$	(39,090	)	$	15,541		$	(23,549	)

Accumulated other comprehensive income (loss), net consisted of unrealized gains (losses)


	Investment securities						Cash flow			Foreign currency translation			Defined benefit
	With OTTI			All other			hedges			adjustment			plans			Total
	(in thousands)
Balance – January 1, 2012	$	(84,029	)		5,995			112			(803	)		(277,716	)		(356,441	)
Net gain (loss) during period		11,108			58,263			(112	)		(131	)		9,464			78,592

Balance – June 30, 2012	$	(72,921	)		64,258			—			(934	)		(268,252	)		(277,849	)

Balance – January 1, 2011	$	(87,053	)		2,332			393			—			(120,892	)		(205,220	)
Net gain (loss) during period		11,663			(39,555	)		(141	)		196			4,288			(23,549	)

Balance – June 30, 2011	$	(75,390	)		(37,223	)		252			196			(116,604	)		(228,769	)

Derivative financial instruments (Tables)

6 Months Ended

Jun. 30, 2012

Derivative financial instruments [Abstract]

Information about interest rate swap agreements


	Notional amount		Average maturity		Weighted- average rate
	Notional amount		Average maturity		Fixed			Variable
	(in thousands)		(in years)
June 30, 2012
Fair value hedges:
Fixed rate long-term borrowings (a)	$	900,000		4.9		6.07	%		2.01	%

December 31, 2011
Fair value hedges:
Fixed rate long-term borrowings (a)	$	900,000		5.4		6.07	%		2.07	%

(a)

Under the terms of these agreements, the Company receives settlement amounts at a fixed rate and pays at a variable rate.

Information about fair values of derivative instruments in consolidated balance sheet

Information about the fair values of derivative instruments in the Company’s consolidated balance sheet and consolidated statement of income follows:


	Asset derivatives				Liability derivatives
	Fair value				Fair value
	June 30, 2012		December 31, 2011		June 30, 2012		December 31, 2011
	(in thousands)
Derivatives designated and qualifying as hedging instruments
Fair value hedges:
Interest rate swap agreements (a)	$	149,947		147,302	$	—		—
Commitments to sell real estate loans (a)		446		232		5,274		2,287

		150,393		147,534		5,274		2,287
Derivatives not designated and qualifying as hedging instruments
Mortgage-related commitments to originate real estate loans for sale (a)		34,111		7,991		60		1,068
Commitments to sell real estate loans (a)		992		1,328		9,021		2,771
Trading:
Interest rate contracts (b)		439,617		443,033		409,653		415,836
Foreign exchange and other option and futures contracts (b)		19,628		19,115		20,448		18,723

		494,348		471,467		439,182		438,398

Total derivatives	$	644,741		619,001	$	444,456		440,685

(a)

Asset derivatives are reported in other assets and liability derivatives are reported in other liabilities.

(b)

Asset derivatives are reported in trading account assets and liability derivatives are reported in other liabilities.

Information about fair values of derivative instruments in consolidated statement of income


	Amount of unrealized gain (loss) recognized
	Three months ended June 30, 2012						Three months ended June 30, 2011
	Derivative			Hedged item			Derivative			Hedged item
	(in thousands)
Derivatives in fair value hedging relationships
Interest rate swap agreements:
Fixed rate long-term borrowings (a)	$	9,674			(9,168	)	$	21,945			(21,145	)

Derivatives not designated as hedging instruments
Trading:
Interest rate contracts (b)	$	2,080					$	1,001
Foreign exchange and other option and futures contracts (b)		(2,435	)					(743	)

Total	$	(355	)				$	258


	Amount of unrealized gain (loss) recognized
	Six months ended June 30, 2012						Six months ended June 30, 2011
	Derivative			Hedged item			Derivative			Hedged item
	(in thousands)
Derivatives in fair value hedging relationships
Interest rate swap agreements:
Fixed rate long-term borrowings (a)	$	2,645			(2,624	)	$	9,540			(9,097	)

Derivatives not designated as hedging instruments
Trading:
Interest rate contracts (b)	$	3,219					$	1,476
Foreign exchange and other option and futures contracts (b)		(3,145	)					(1,291	)

Total	$	74					$	185

(a)

Reported as other revenues from operations.

(b)

Reported as trading account and foreign exchange gains.

- Definition

Tabular disclosure of the location and amount of gains and losses reported in the statement of financial performance, or when applicable, the statement of financial position. For example, (a) gains and losses recognized in the income statement on derivative instruments designated and qualifying as hedging instruments in fair value hedges and related hedged items designated and qualifying in fair value hedges and (b) gains and losses initially recognized in other comprehensive income on derivative instruments designated and qualifying as cash flow hedges.

+ References + Details

Fair value measurements (Tables)

6 Months Ended

Jun. 30, 2012

Fair value measurements [Abstract]

Assets and liabilities measured at estimated fair value on a recurring basis

The following tables present assets and liabilities at June 30, 2012 and December 31, 2011 measured at estimated fair value on a recurring basis:


	Fair value measurements at June 30, 2012		Level 1 (a)		Level 2 (a)		Level 3
	(in thousands)
Trading account assets	$	544,938		53,472		491,466		—
Investment securities available for sale:
U.S. Treasury and federal agencies		56,599		—		56,599		—
Obligations of states and political subdivisions		34,568		—		34,568		—
Mortgage-backed securities:
Government issued or guaranteed		4,058,500		—		4,058,500		—
Privately issued residential		1,068,392		—		—		1,068,392
Privately issued commercial		12,127		—		—		12,127
Collateralized debt obligations		55,098		—		—		55,098
Other debt securities		128,929		—		128,929		—
Equity securities		119,841		108,172		11,669		—

		5,534,054		108,172		4,290,265		1,135,617

Real estate loans held for sale		442,664		—		442,664		—
Other assets (b)		185,496		—		151,385		34,111

Total assets	$	6,707,152		161,644		5,375,780		1,169,728

Trading account liabilities	$	430,101		—		430,101		—
Other liabilities (b)		14,355		—		14,295		60

Total liabilities	$	444,456		—		444,396		60


	Fair value measurements at December 31, 2011		Level 1 (a)		Level 2 (a)		Level 3
	(in thousands)
Trading account assets	$	561,834		53,165		508,669		—
Investment securities available for sale:
U.S. Treasury and federal agencies		70,723		—		70,723		—
Obligations of states and political subdivisions		40,269		—		40,269		—
Mortgage-backed securities:
Government issued or guaranteed		4,521,233		—		4,521,233		—
Privately issued residential		1,136,256		—		—		1,136,256
Privately issued commercial		15,029		—		—		15,029
Collateralized debt obligations		52,500		—		—		52,500
Other debt securities		176,845		—		176,845		—
Equity securities		215,705		205,587		10,118		—

		6,228,560		205,587		4,819,188		1,203,785

Real estate loans held for sale		371,437		—		371,437		—
Other assets (b)		156,853		—		148,862		7,991

Total assets	$	7,318,684		258,752		5,848,156		1,211,776

Trading account liabilities	$	434,559		—		434,559		—
Other liabilities (b)		6,126		—		5,058		1,068

Total liabilities	$	440,685		—		439,617		1,068

(a)

There were no significant transfers between Level 1 and Level 2 of the fair value hierarchy during the three months and six months ended June 30, 2012 and 2011.

(b)

Changes in Level 3 assets and liabilities measured at estimated fair value on a recurring basis

The changes in Level 3 assets and liabilities measured at estimated fair value on a recurring basis during the three months ended June 30, 2012 were as follows:


	Investment securities available for sale
	Privately issued residential mortgage-backed securities			Privately issued commercial mortgage-backed securities			Collateralized debt obligations			Other assets and other liabilities
	(in thousands)
Balance – March 31, 2012	$	1,110,695		$	13,435		$	58,184		$	20,435
Total gains (losses) realized/unrealized:
Included in earnings		(14,627	)(a)		—			—			45,486	(b)
Included in other comprehensive income		22,613	(e)		763	(e)		(2,712	)(e)		—
Settlements		(50,289	)		(2,071	)		(374	)		—
Transfers in and/or out of Level 3 (c)		—			—			—			(31,870	)(d)

Balance – June 30, 2012	$	1,068,392		$	12,127		$	55,098		$	34,051

Changes in unrealized gains (losses) included in earnings related to assets still held at June 30, 2012	$	(14,627	)(a)	$	—		$	—		$	28,904	(b)

The changes in Level 3 assets and liabilities measured at estimated fair value on a recurring basis during the three months ended June 30, 2011 were as follows:


	Investment securities available for sale
	Privately issued residential mortgage-backed securities			Privately issued commercial mortgage-backed securities			Collateralized debt obligations			Other assets and other liabilities
	(in thousands)
Balance – March 31, 2011	$	1,391,878		$	20,467		$	114,265		$	16,147
Total gains (losses) realized/unrealized:
Included in earnings		(24,530	)(a)		—			—			22,800	(b)
Included in other comprehensive income		38,471	(e)		(1,400	)(e)		3,372	(e)		—
Purchases		—			—			50,790			—
Sales		—			—			(105,643	)		—
Settlements		(99,617	)		(1,834	)		(1,183	)		—
Transfers in and/or out of Level 3 (c)		—			—			—			(25,776	)(d)

Balance – June 30, 2011	$	1,306,202		$	17,233		$	61,601		$	13,171

Changes in unrealized gains (losses) included in earnings related to assets still held at June 30, 2011	$	(24,530	)(a)	$	—		$	—		$	10,252	(b)

The changes in Level 3 assets and liabilities measured at estimated fair value on a recurring basis during the six months ended June 30, 2012 were as follows:


	Investment securities available for sale
	Privately issued residential mortgage-backed securities			Privately issued commercial mortgage-backed securities			Collateralized debt obligations			Other assets and other liabilities
	(in thousands)
Balance – January 1, 2012	$	1,136,256		$	15,029		$	52,500		$	6,923
Total gains (losses) realized/unrealized:
Included in earnings		(22,304	)(a)		—			—			72,517	(b)
Included in other comprehensive income		47,683	(e)		1,111	(e)		3,711	(e)		—
Settlements		(93,243	)		(4,013	)		(1,113	)		—
Transfers in and/or out of Level 3 (c)		—			—			—			(45,389	)(d)

Balance – June 30, 2012	$	1,068,392		$	12,127		$	55,098		$	34,051

Changes in unrealized gains (losses) included in earnings related to assets still held at June 30, 2012	$	(22,304	)(a)	$	—		$	—		$	33,647	(b)

The changes in Level 3 assets and liabilities measured at estimated fair value on a recurring basis during the six months ended June 30, 2011 were as follows:


	Investment securities available for sale
	Privately issued residential mortgage-backed securities			Privately issued commercial mortgage-backed securities			Collateralized debt obligations			Other assets and other liabilities
	(in thousands)
Balance – January 1, 2011	$	1,435,561		$	22,407		$	110,756		$	2,244
Total gains (losses) realized/unrealized:
Included in earnings		(32,071	)(a)		—			—			43,244	(b)
Included in other comprehensive income		99,556	(e)		(1,482	)(e)		7,206	(e)		—
Purchases		—			—			50,790			—
Sales		—			—			(105,643	)		—
Settlements		(196,844	)		(3,692	)		(1,508	)		—
Transfers in and/or out of Level 3 (c)		—			—			—			(32,317	)(d)

Balance – June 30, 2011	$	1,306,202		$	17,233		$	61,601		$	13,171

Changes in unrealized gains (losses) included in earnings related to assets still held at June 30, 2011	$	(32,071	)(a)	$	—		$	—		$	13,139	(b)

(a)

Reported as an other-than-temporary impairment loss in the consolidated statement of income or as gain (loss) on bank investment securities.

(b)

Reported as mortgage banking revenues in the consolidated statement of income and includes the fair value of commitment issuances and expirations.

(c)

The Company’s policy for transfers between fair value levels is to recognize the transfer as of the actual date of the event or change in circumstances that caused the transfer.

(d)

Transfers out of Level 3 consist of interest rate locks transferred to closed loans.

(e)

Reported as net unrealized gains on investment securities in the consolidated statement of comprehensive income.

Quantitative information related to significant unobservable inputs

The following table presents quantitative information about the significant unobservable inputs used in the fair value measurements for Level 3 assets and liabilities at June 30, 2012:


	Fair value at June 30, 2012		Valuation technique	Unobservable input/assumptions	Range (weighted- average)
Recurring fair value measurements
Privately issued mortgage–backed securities	$	1,080,519	Discounted cash flow	Probability of default	1%-49% (18%)
				Loss severity	32%-75% (49%)
Colateralized debt obligations		55,098	Discounted cash flow	Probability of default	3%-65% (14%)
				Loss severity	100%
Net other assets (liabilities)(a)		34,051	Discounted cash flow	Commitment expirations	0%-69% (18%)

Total level 3 assets, net of liabilities	$	1,169,668

(a)

Other level 3 assets (liabilities) consist of commitments to originate real estate loans.

Carrying amounts and estimated fair value for financial instrument assets(liabilities)

The carrying amounts and estimated fair value for financial instrument assets (liabilities) are presented in the following table:


	June 30, 2012
	Carrying amount			Estimated fair value			Level 1		Level 2			Level 3
	(in thousands)
Financial assets:
Cash and cash equivalents	$	1,422,831		$	1,422,831		$	1,343,415	$	79,416		$	—
Interest-bearing deposits at banks		1,069,717			1,069,717			—		1,069,717			—
Trading account assets		544,938			544,938			53,472		491,466			—
Investment securities		7,057,300			7,000,671			108,172		5,598,494			1,294,005
Loans and leases:
Commercial loans and leases		16,395,587			16,146,408			—		—			16,146,408
Commercial real estate loans		24,898,707			24,687,443			—		109,645			24,577,798
Residential real estate loans		9,811,525			9,843,421			—		6,617,925			3,225,496
Consumer loans		11,745,453			11,605,448			—		—			11,605,448
Allowance for credit losses		(917,028	)		—			—		—			—

Loans and leases, net		61,934,244			62,282,720			—		6,727,570			55,555,150
Accrued interest receivable		220,510			220,510			—		220,510			—
Financial liabilities:
Noninterest-bearing deposits	$	(22,854,794	)	$	(22,854,794	)	$	—	$	(22,854,794	)	$	—
Savings deposits and NOW accounts		(33,997,610	)		(33,997,610	)		—		(33,997,610	)		—
Time deposits		(5,330,239	)		(5,360,561	)		—		(5,360,561	)		—
Deposits at Cayman Islands office		(366,164	)		(366,164	)		—		(366,164	)		—
Short-term borrowings		(975,575	)		(975,575	)		—		(975,575	)		—
Long-term borrowings		(5,687,868	)		(5,784,700	)		—		(5,784,700	)		—
Accrued interest payable		(67,523	)		(67,523	)		—		(67,523	)		—
Trading account liabilities		(430,101	)		(430,101	)		—		(430,101	)		—
Other financial instruments:
Commitments to originate real estate loans for sale	$	34,051		$	34,051		$	—	$	—		$	34,051
Commitments to sell real estate loans		(12,857	)		(12,857	)		—		(12,857	)		—
Other credit-related commitments		(127,616	)		(127,616	)		—		—			(127,616	)
Interest rate swap agreements used for interest rate risk management		149,947			149,947			—		149,947			—


	December 31, 2011
	Carrying amount			Estimated fair value
	(in thousands)
Financial assets:
Cash and cash equivalents	$	1,452,397		$	1,452,397
Interest-bearing deposits at banks		154,960			154,960
Trading account assets		561,834			561,834
Investment securities		7,673,154			7,608,008
Loans and leases:
Commercial loans and leases		15,734,436			15,507,342
Commercial real estate loans		24,411,114			24,024,585
Residential real estate loans		7,923,165			7,782,935
Consumer loans		12,027,290			11,869,813
Allowance for credit losses		(908,290	)		—

Loans and leases, net		59,187,715			59,184,675
Accrued interest receivable		222,618			222,618
Financial liabilities:
Noninterest-bearing deposits	$	(20,017,883	)	$	(20,017,883	)
Savings deposits and NOW accounts		(32,913,309	)		(32,913,309	)
Time deposits		(6,107,530	)		(6,133,806	)
Deposits at Cayman Islands office		(355,927	)		(355,927	)
Short-term borrowings		(782,082	)		(782,082	)
Long-term borrowings		(6,686,226	)		(6,720,174	)
Accrued interest payable		(67,900	)		(67,900	)
Trading account liabilities		(434,559	)		(434,559	)
Other financial instruments:
Commitments to originate real estate loans for sale	$	6,923		$	6,923
Commitments to sell real estate loans		(3,498	)		(3,498	)
Other credit-related commitments		(109,828	)		(109,828	)
Interest rate swap agreements used for interest rate risk management		147,302			147,302

- Definition

Tabular disclosure of the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments, assets, and liabilities. Such certain disclosures about the financial instruments, assets, and liabilities include: (1) the fair value of the required items together with their carrying amounts (as appropriate) and (2) the methodology and assumptions used in developing such estimates of fair value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13476-108611

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13467-108611

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6447952&loc=d3e13220-108610

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 30
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14172-108612

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13433-108611

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 159
-Paragraph 19
-Subparagraph a, b, c(1), d(1)
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 107
-Paragraph 14
-Subparagraph a
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 107
-Paragraph 15
-Subparagraph b-d
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 159
-Paragraph 18
-Subparagraph c(2), d, e, f
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 157
-Paragraph 32
-Subparagraph a, c(1), c(2), c(3), d
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 12: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 107
-Paragraph 10
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

- Definition

The entire disclosure of the fair value measurement of assets and liabilities, which includes financial instruments measured at fair value that are classified in shareholders' equity, which may be measured on a recurring or nonrecurring basis.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19279-110258

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19190-110258

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 107
-Paragraph 10
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 157
-Paragraph 32
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 157
-Paragraph 6
-Footnote 4
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 157
-Paragraph 33
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Commitments and contingencies (Tables)

6 Months Ended

Jun. 30, 2012

Commitments and contingencies [Abstract]

Company's significant commitments


	June 30, 2012		December 31, 2011
	(in thousands)
Commitments to extend credit
Home equity lines of credit	$	6,369,114		6,393,332
Commercial real estate loans to be sold		134,471		177,982
Other commercial real estate and construction		3,138,855		2,818,071
Residential real estate loans to be sold		771,278		182,474
Other residential real estate		438,197		129,466
Commercial and other		10,004,023		10,442,754
Standby letters of credit		3,811,819		3,930,271
Commercial letters of credit		56,725		44,981
Financial guarantees and indemnification contracts		1,895,755		1,903,254
Commitments to sell real estate loans		1,068,940		635,899

Segment information (Tables)

6 Months Ended

Jun. 30, 2012

Segment information [Abstract]

Information about the Company's segments


	Three months ended June 30
	2012									2011
	Total revenues (a)			Inter- segment revenues			Net income (loss)			Total revenues (a)		Inter- segment revenues			Net income (loss)
	(in thousands)
Business Banking	$	109,318			1,099			37,085			104,012		971			26,584
Commercial Banking		248,754			1,731			99,623			228,564		1,190			95,111
Commercial Real Estate		168,083			396			80,498			134,066		448			65,058
Discretionary Portfolio		(11,807	)		(20,616	)		(14,757	)		112,383		(4,419	)		58,362
Residential Mortgage Banking		109,995			37,455			25,994			58,305		8,699			5,966
Retail Banking		313,994			3,198			58,191			311,484		2,967			54,645
All Other		101,296			(23,263	)		(53,254	)		139,044		(9,856	)		16,632

Total	$	1,039,633			—			233,380			1,087,858		—			322,358


	Six months ended June 30
	2012									2011
	Total revenues (a)			Inter- segment revenues			Net income (loss)			Total revenues (a)		Inter- segment revenues			Net income (loss)
	(in thousands)
Business Banking	$	221,294			2,191			72,418		$	203,789		1,933			52,884
Commercial Banking		486,216			3,271			202,719			442,176		2,356			183,442
Commercial Real Estate		321,627			829			149,129			259,372		804			114,068
Discretionary Portfolio		(12,967	)		(35,397	)		(22,998	)		154,866		(12,206	)		74,489
Residential Mortgage Banking		203,037			71,896			49,511			116,153		19,006			10,751
Retail Banking		620,842			6,090			106,848			606,532		5,954			107,371
All Other		196,696			(48,880	)		(117,784	)		188,194		(17,847	)		(14,374	)

Total	$	2,036,745			—			439,843		$	1,971,082		—			528,631

Summary of segment information


	Average total assets
	Six months ended June 30				Year ended December 31
	2012		2011		2011
	(in millions)
Business Banking	$	4,932		4,861		5,192
Commercial Banking		19,455		16,856		17,650
Commercial Real Estate		16,316		14,227		15,025
Discretionary Portfolio		16,136		14,012		14,170
Residential Mortgage Banking		2,200		1,940		1,958
Retail Banking		11,791		11,776		11,940
All Other		8,226		6,590		8,042

Total	$	79,056		70,262		73,977

(a)

- Definition

Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.

+ References + Details

Acquisitions (Details) - Wilmington Trust Corporation [Member] - USD ($) $ in Thousands	1 Months Ended
	May 31, 2011	May 16, 2011
Purchase price:
Common shares issued (4,694,486 shares)		$ 405,557
Preferred stock purchased from U.S. Treasury		330,000
Total purchase price		735,557
Identifiable assets:
Cash and due from banks		178,940
Interest-bearing deposits at banks		2,606,265
Other short-term investments		57,817
Investment securities		510,390
Loans and leases		6,410,430
Core deposit and other intangibles		112,094
Other assets		969,106
Total identifiable assets		10,845,042
Liabilities:
Deposits		8,864,161
Short-term borrowings		147,752
Long-term borrowings		600,830
Other liabilities		431,812
Total liabilities		$ 10,044,555
Net gain resulting from acquisition	$ 64,930

Acquisitions (Details 1) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Acquisitions (Details 1) - USD ($) $ in Thousands	Jun. 30, 2011	Jun. 30, 2011
Pro forma information
Total revenues pro forma	$ 1,166,694	$ 2,208,188
Net income pro forma	$ 309,527	$ 480,948

Acquisitions (Details 2) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
Acquisitions (Details 2) - USD ($) $ in Thousands	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Summary of merger-related expenses
Salaries and employee benefits	$ 323,686	$ 300,178	$ 669,784	$ 566,268
Equipment and net occupancy	65,376	59,670	130,419	116,333
Printing, postage and supplies	11,368	9,723	23,240	18,925
Other costs of operations	186,093	165,975	357,052	302,183
K Bank and Wilmington Trust Corporation Acquisition [Member]
Summary of merger-related expenses
Salaries and employee benefits	3,024	15,305	4,997	15,312
Equipment and net occupancy		25	15	104
Printing, postage and supplies		318		465
Other costs of operations	4,127	21,348	4,867	25,410
Total merger-related expenses	$ 7,151	$ 36,996	$ 9,879	$ 41,291

- Definition

Amount of net occupancy expense that may include items, such as depreciation of facilities and equipment, lease expenses, property taxes and property and casualty insurance expense.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.14(b))
-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.6)
-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 30
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6455398&loc=d3e45280-112737

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 13
-Paragraph 15
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 13
-Paragraph 16
-Subparagraph d
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Audit and Accounting Guide (AAG)
-Number AAG-BRD
-Paragraph 62
-IssueDate 2006-05-01
-Chapter 4
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 13
-Paragraph 16
-Subparagraph c
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 13
-Paragraph 16
-Subparagraph b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Acquisitions (Details Textual) $ in Thousands	1 Months Ended	3 Months Ended			6 Months Ended		12 Months Ended
Acquisitions (Details Textual) $ in Thousands	May 31, 2011 USD ($) shares	Jun. 30, 2012 USD ($)	Jun. 30, 2011 USD ($)	Mar. 31, 2011 USD ($)	Jun. 30, 2012 USD ($)	Jun. 30, 2011 USD ($)	Dec. 31, 2011 USD ($)	May 16, 2011 USD ($) Office shares
Acquisitions (Textual) [Abstract]
Provision for credit losses		$ 60,000	$ 63,000		$ 109,000	$ 138,000
Minimum [Member]
Acquisitions (Textual) [Abstract]
Intangible Assets Amortization	5 years
Maximum [Member]
Acquisitions (Textual) [Abstract]
Intangible Assets Amortization	7 years
Wilmington Trust Corporation Acquisition [Member]
Acquisitions (Textual) [Abstract]
Number of banking offices operated \| Office								55
Shares of M&T common stock exchanged for each share of Wilmington Trust common stock \| shares								0.051372
Common stock issued for acquisition \| shares	4,694,486
Common shares issued for acquisition fair value								$ 406,000
Assets acquired total								10,800,000
Loans and leases								6,400,000
Commercial real estate loans								3,200,000
Commercial loans and leases								1,400,000
Consumer loans								1,100,000
Residential real estate loans								680,000
Liabilities								10,000,000
Deposits								8,900,000
Value added in shareholders equity due to acquisition								406,000
Preferred stock redeemed in connection with Willington Trust acquisition								330,000
Core deposit and other intangibles								112,000
Provision for credit losses				$ 41,000
Other- than-temporary impairment							$ 5,000
Non taxable gain recorded in connection with acquisition	$ 65,000
Wilmington Trust Corporation [Member]
Acquisitions (Textual) [Abstract]
Assets acquired total								10,845,042
Loans and leases								6,410,430
Liabilities								10,044,555
Deposits								$ 8,864,161

Investment securities (Details) - USD ($) $ in Thousands	Jun. 30, 2012	Dec. 31, 2011
Investment securities available for sale:
Investment securities, available for sale, amortized cost	$ 5,510,097	$ 6,312,423
Gross Unrealized Gains	251,094	210,001
Gross Unrealized Losses	227,137	293,864
Estimated fair value	5,534,054	6,228,560
Investment securities held to maturity:
Amortized Cost for Held-to-maturity	1,188,465	1,077,708
Gross Unrealized Gains for Held-to-maturity	40,621	34,022
Gross Unrealized Losses for Held-to-maturity	97,250	99,168
Estimated fair value for Held-to-maturity	1,131,836	1,012,562
Amortized cost and estimated fair value of investment securities
Other securities, Amortized Cost	334,781	366,886
Other securities, Estimated fair value	334,781	366,886
Total Amortized Cost	7,033,343	7,757,017
Total for Gross Unrealized Gains	291,715	244,023
Total for Gross Unrealized losses	324,387	393,032
Total for Estimated fair value	7,000,671	7,608,008
U.S. Treasury and federal agencies [Member]
Investment securities available for sale:
Investment securities, available for sale, amortized cost	55,484	69,468
Gross Unrealized Gains	1,115	1,255
Estimated fair value	56,599	70,723
Obligations of states and political subdivisions [Member]
Investment securities available for sale:
Investment securities, available for sale, amortized cost	34,007	39,518
Gross Unrealized Gains	569	771
Gross Unrealized Losses	8	20
Estimated fair value	34,568	40,269
Government issued or guaranteed [Member]
Investment securities available for sale:
Investment securities, available for sale, amortized cost	3,840,610	4,344,116
Gross Unrealized Gains	218,117	177,392
Gross Unrealized Losses	227	275
Estimated fair value	4,058,500	4,521,233
Privately issued [Member]
Investment securities available for sale:
Investment securities, available for sale, amortized cost	1,252,709	1,369,371
Gross Unrealized Gains	5,254	6,373
Gross Unrealized Losses	189,571	239,488
Estimated fair value	1,068,392	1,136,256
Privately issued commercial [Member]
Investment securities available for sale:
Investment securities, available for sale, amortized cost	13,048	17,679
Gross Unrealized Losses	921	2,650
Estimated fair value	12,127	15,029
Collateralized Debt Obligations [Member]
Investment securities available for sale:
Investment securities, available for sale, amortized cost	43,749	43,834
Gross Unrealized Gains	13,079	11,154
Gross Unrealized Losses	1,730	2,488
Estimated fair value	55,098	52,500
Other Debt Securities [Member]
Investment securities available for sale:
Investment securities, available for sale, amortized cost	158,153	216,700
Gross Unrealized Gains	2,034	4,588
Gross Unrealized Losses	31,258	44,443
Estimated fair value	128,929	176,845
Equity Securities [Member]
Investment securities available for sale:
Investment securities, available for sale, amortized cost	112,337	211,737
Gross Unrealized Gains	10,926	8,468
Gross Unrealized Losses	3,422	4,500
Estimated fair value	119,841	215,705
Obligations of states and political subdivisions [Member]
Investment securities held to maturity:
Amortized Cost for Held-to-maturity	187,936	188,680
Gross Unrealized Gains for Held-to-maturity	8,375	9,141
Gross Unrealized Losses for Held-to-maturity	30	28
Estimated fair value for Held-to-maturity	196,281	197,793
Other Debt Securities [Member]
Investment securities held to maturity:
Amortized Cost for Held-to-maturity	11,326	11,853
Estimated fair value for Held-to-maturity	$ 11,326	$ 11,853

Investment securities (Details 1) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
Investment securities (Details 1) - USD ($) $ in Thousands	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Beginning balance	$ 267,473	$ 322,719	$ 285,399	$ 327,912
Additions for credit losses not previously recognized	16,173	26,530	27,659	42,571
Reductions for increases in cash flows		(4,881)		(5,020)
Reductions For Realized Losses	(19,449)	(46,227)	(48,861)	(67,322)
Ending balance	$ 264,197	$ 298,141	$ 264,197	$ 298,141

Investment Securities (Details 2) $ in Thousands	Jun. 30, 2012 USD ($)
Debt securities available for sale:
Due in one year or less	$ 33,314
Due after one year through five years	40,715
Due after five years through ten years	11,098
Due after ten years	206,266
Total available for available for sale (amortized cost)	291,393
Mortgage-backed securities available for sale	5,106,367
Total	5,397,760
Debt securities available for sale:
Due in one year or less	33,367
Due after one year through five years	42,082
Due after five years through ten years	11,886
Due after ten years	187,859
Total available for available for sale (fair value)	275,194
Mortgage-backed securities available for sale	5,139,019
Total	5,414,213
Debt securities held to maturity:
Due in one year or less	30,983
Due after one year through five years	40,576
Due after five years through ten years	114,797
Due after ten years	12,906
Total available for held to maturity (amortized cost)	199,262
Mortgage-backed securities held to maturity	989,203
Total	1,188,465
Debt securities held to maturity:
Due in one year or less	31,166
Due after one year through five years	42,599
Due after five years through ten years	120,839
Due after ten years	13,003
Total available for held to maturity (fair value)	207,607
Mortgage-backed securities held to maturity	924,229
Total	$ 1,131,836

Investment securities (Details 3) - USD ($) $ in Thousands	Jun. 30, 2012	Dec. 31, 2011
Investment Securities Continuous Unrealized Loss Position Fair Value
Estimated fair value, Less than 12 months	$ 170,328	$ 421,016
Available For Sale Securities Continuous Unrealized Losses Position Less Than Twelve Months Aggregate Losses	(5,413)	(29,096)
Estimated fair value, 12 months or more	946,252	851,849
Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or More Aggregate Losses	(221,724)	(264,768)
U.S. Treasury and federal agencies [Member]
Investment Securities Continuous Unrealized Loss Position Fair Value
Estimated fair value, Less than 12 months	171
Available For Sale Securities Continuous Unrealized Losses Position Less Than Twelve Months Aggregate Losses	(1)
Estimated fair value, 12 months or more	678
Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or More Aggregate Losses	(7)
Obligations of states and political subdivisions [Member]
Investment Securities Continuous Unrealized Loss Position Fair Value
Estimated fair value, Less than 12 months
Available For Sale Securities Continuous Unrealized Losses Position Less Than Twelve Months Aggregate Losses
Estimated fair value, 12 months or more		1,228
Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or More Aggregate Losses		(20)
Government issued or guaranteed [Member]
Investment Securities Continuous Unrealized Loss Position Fair Value
Estimated fair value, Less than 12 months	15,936	38,492
Available For Sale Securities Continuous Unrealized Losses Position Less Than Twelve Months Aggregate Losses	(70)	(190)
Estimated fair value, 12 months or more	9,951	6,017
Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or More Aggregate Losses	(157)	(85)
Privately issued [Member]
Investment Securities Continuous Unrealized Loss Position Fair Value
Estimated fair value, Less than 12 months		297,133
Available For Sale Securities Continuous Unrealized Losses Position Less Than Twelve Months Aggregate Losses		(14,188)
Estimated fair value, 12 months or more		751,077
Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or More Aggregate Losses		(225,300)
Privately issued residential [Member]
Investment Securities Continuous Unrealized Loss Position Fair Value
Estimated fair value, Less than 12 months	126,139
Available For Sale Securities Continuous Unrealized Losses Position Less Than Twelve Months Aggregate Losses	(1,861)
Estimated fair value, 12 months or more	841,748
Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or More Aggregate Losses	(187,710)
Privately issued commercial [Member]
Investment Securities Continuous Unrealized Loss Position Fair Value
Estimated fair value, Less than 12 months
Available For Sale Securities Continuous Unrealized Losses Position Less Than Twelve Months Aggregate Losses
Estimated fair value, 12 months or more	12,127	15,029
Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or More Aggregate Losses	(921)	(2,650)
Collateralized Debt Obligations [Member]
Investment Securities Continuous Unrealized Loss Position Fair Value
Estimated fair value, Less than 12 months	3,106	2,871
Available For Sale Securities Continuous Unrealized Losses Position Less Than Twelve Months Aggregate Losses	(39)	(335)
Estimated fair value, 12 months or more	5,349	4,863
Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or More Aggregate Losses	(1,691)	(2,153)
Other Debt Securities [Member]
Investment Securities Continuous Unrealized Loss Position Fair Value
Estimated fair value, Less than 12 months	16,858	72,637
Available For Sale Securities Continuous Unrealized Losses Position Less Than Twelve Months Aggregate Losses	(2,053)	(9,883)
Estimated fair value, 12 months or more	74,206	73,635
Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or More Aggregate Losses	(29,205)	(34,560)
Equity Securities [Member]
Investment Securities Continuous Unrealized Loss Position Fair Value
Estimated fair value, Less than 12 months	8,118	9,883
Available For Sale Securities Continuous Unrealized Losses Position Less Than Twelve Months Aggregate Losses	(1,389)	$ (4,500)
Estimated fair value, 12 months or more	2,193
Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or More Aggregate Losses	$ (2,033)

Investment securities (Details 4) - USD ($) $ in Thousands	Jun. 30, 2012	Dec. 31, 2011
Held To Maturity Securities Continuous Unrealized Loss Position [Abstract]
Held to maturity, Estimated fair value, Less than 12 months	$ 5,598	$ 4,967
Held To Maturity Securities Continuous Unrealized Loss Position Less Than12 Months Aggregate Losses	(23)	(596)
Held to maturity, Estimated fair value, 12 months or more	157,828	168,569
Held To Maturity Securities Continuous Unrealized Loss Position12 Months Or Longer Aggregate Losses		(98,572)
Investment securities in continuous unrealized loss position
Total investment securities, fair value less than 12 months	175,926	425,983
Investment Securities Continuous Unrealized Loss Position Less Than Twelve Months Aggregate Losses	(5,436)	(29,692)
Total of investment securities, fair value, more than 12 months	1,104,080	1,020,418
Investment Securities Continuous Unrealized Loss Position Twelve Months or Longer Aggregate Losses	(318,951)	(363,340)
Obligations of states and political subdivisions [Member]
Held To Maturity Securities Continuous Unrealized Loss Position [Abstract]
Held to maturity, Estimated fair value, Less than 12 months	5,598	3,084
Held To Maturity Securities Continuous Unrealized Loss Position Less Than12 Months Aggregate Losses	(23)	(4)
Held to maturity, Estimated fair value, 12 months or more	169	1,430
Held To Maturity Securities Continuous Unrealized Loss Position12 Months Or Longer Aggregate Losses	(7)	(24)
Privately Issued Mortgage Backed Securities [Member]
Held To Maturity Securities Continuous Unrealized Loss Position [Abstract]
Held to maturity, Estimated fair value, Less than 12 months		1,883
Held To Maturity Securities Continuous Unrealized Loss Position Less Than12 Months Aggregate Losses		(592)
Held to maturity, Estimated fair value, 12 months or more	157,659	167,139
Held To Maturity Securities Continuous Unrealized Loss Position12 Months Or Longer Aggregate Losses	$ (97,220)	$ (98,548)

Investment securities (Details Textual) $ in Thousands	3 Months Ended			6 Months Ended
Investment securities (Details Textual) $ in Thousands	Jun. 30, 2012 USD ($) Investment	Jun. 30, 2011 USD ($)	Mar. 31, 2011 USD ($)	Jun. 30, 2012 USD ($) Investment	Jun. 30, 2011 USD ($)	Dec. 31, 2011 USD ($)
Investment securities (Textual) [Abstract]
Gross realized gains on investment securities		$ 111,000			$ 150,000
Gross realized losses on investment securities		0			0
Number of investment securities with aggregate gross unrealized losses \| Investment	290			290
Unrealized losses on individual investment securities	$ 324,387			$ 324,387		$ 393,032
Unrealized losses on privately issued residential mortgage-backed securities				288,000
Privately issued mortgage backed securities at cost	1,400,000			1,400,000
Unrealized losses on trust preferred securities issued by financial institutions and securities backed by trust preferred securities				33,000
Other debt securities at cost	133,000			133,000
Other, fair value	334,781			334,781		$ 366,886
Mortgage-backed securities [Member]
Investment Holdings [Line Items]
Pre-tax other-than temporary impairment losses	$ 16,000	27,000		$ 28,000	43,000
Aggregate amortized cost on mortgage-backed securities		1,000,000			1,000,000
Pre-tax gain on sale of mortgage-backed securities		66,000
Collateralized Debt Obligations [Member]
Investment Holdings [Line Items]
Aggregate amortized cost on mortgage-backed securities		100,000			100,000
Pre-tax gain on sale of mortgage-backed securities		20,000
Trust preferred securities [Member]
Investment Holdings [Line Items]
Aggregate amortized cost on mortgage-backed securities		136,000			$ 136,000
Pre-tax gain on sale of mortgage-backed securities		$ 25,000
Government issued or guaranteed [Member]
Investment Holdings [Line Items]
Aggregate amortized cost on mortgage-backed securities			$ 484,000
Pre-tax gain on sale of mortgage-backed securities			$ 39,000

Loans and leases and the allowance for credit losses (Details) - USD ($) $ in Thousands	Jun. 30, 2012	Dec. 31, 2011
Outstanding principal and carrying value of acquired loans recorded at fair value
Outstanding principal balance	$ 8,097,216	$ 9,203,366
Carrying amount	7,088,438	8,159,787
Commercial, financial, leasing [Member]
Outstanding principal and carrying value of acquired loans recorded at fair value
Carrying amount	1,216,711	1,331,198
Commercial real estate [Member]
Outstanding principal and carrying value of acquired loans recorded at fair value
Carrying amount	3,222,688	3,879,518
Residential real estate [Member]
Outstanding principal and carrying value of acquired loans recorded at fair value
Carrying amount	814,288	915,371
Consumer [Member]
Outstanding principal and carrying value of acquired loans recorded at fair value
Carrying amount	$ 1,834,751	$ 2,033,700

Loans and leases and the allowance for credit losses (Details 1) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2012
Summary of changes in Accretable Yield for acquired loans
Balance at the beginning of period	$ 770,031	$ 838,765
Interest income	(89,870)	(171,257)
Reclassifications from (to) nonaccretable balance, net	139,820	140,244
Other (a)	(31,221)	(18,992)
Balance at end of period	788,760	788,760
Other [Member]
Summary of changes in Accretable Yield for acquired loans
Balance at the beginning of period	747,466	807,960
Interest income	(80,249)	(153,972)
Reclassifications from (to) nonaccretable balance, net	97,165	98,165
Other (a)	(31,221)	(18,992)
Balance at end of period	733,161	733,161
Purchase Impaired [Member]
Summary of changes in Accretable Yield for acquired loans
Balance at the beginning of period	22,565	30,805
Interest income	(9,621)	(17,285)
Reclassifications from (to) nonaccretable balance, net	42,655	42,079
Balance at end of period	$ 55,599	$ 55,599

Loans and leases and the allowance for credit losses (Details 2) - USD ($) $ in Thousands	Jun. 30, 2012	Dec. 31, 2011
Summary of current, past due and nonaccrual loans
Current	$ 60,228,712	$ 57,167,794
30-89 days past due	656,447	725,654
Purchased impaired	560,700	653,362
Nonaccrual	968,328	1,097,581
Loans and leases, net of unearned discount	62,851,272	60,096,005
Non-Acquired Financing Receivable [Member]
Summary of current, past due and nonaccrual loans
90 days or more past due and accruing	274,598	287,876
Acquired Financing Receivable [Member]
Summary of current, past due and nonaccrual loans
90 days or more past due and accruing	162,487	163,738
Commercial, financial, leasing [Member]
Summary of current, past due and nonaccrual loans
Current	16,138,169	15,493,803
30-89 days past due	73,581	37,112
Purchased impaired	16,424	23,762
Nonaccrual	153,556	163,598
Loans and leases, net of unearned discount	16,395,587	15,734,436
Commercial, financial, leasing [Member] \| Non-Acquired Financing Receivable [Member]
Summary of current, past due and nonaccrual loans
90 days or more past due and accruing	1,455	7,601
Commercial, financial, leasing [Member] \| Acquired Financing Receivable [Member]
Summary of current, past due and nonaccrual loans
90 days or more past due and accruing	12,402	8,560
Commercial Real Estate Excluding Residential Builder and Developer and Other Construction [Member]
Summary of current, past due and nonaccrual loans
Current	20,854,618	19,658,761
30-89 days past due	128,489	172,641
Purchased impaired	164,855	192,804
Nonaccrual	173,278	171,111
Loans and leases, net of unearned discount	21,380,406	20,259,448
Commercial Real Estate Excluding Residential Builder and Developer and Other Construction [Member] \| Non-Acquired Financing Receivable [Member]
Summary of current, past due and nonaccrual loans
90 days or more past due and accruing	10,128	9,983
Commercial Real Estate Excluding Residential Builder and Developer and Other Construction [Member] \| Acquired Financing Receivable [Member]
Summary of current, past due and nonaccrual loans
90 days or more past due and accruing	49,038	54,148
Residential builder and developer [Member]
Summary of current, past due and nonaccrual loans
Current	761,655	845,680
30-89 days past due	47,065	49,353
Purchased impaired	264,163	297,005
Nonaccrual	240,248	281,576
Loans and leases, net of unearned discount	1,333,674	1,508,333
Residential builder and developer [Member] \| Non-Acquired Financing Receivable [Member]
Summary of current, past due and nonaccrual loans
90 days or more past due and accruing	2,213	13,603
Residential builder and developer [Member] \| Acquired Financing Receivable [Member]
Summary of current, past due and nonaccrual loans
90 days or more past due and accruing	18,330	21,116
Other commercial construction [Member]
Summary of current, past due and nonaccrual loans
Current	2,051,194	2,393,304
30-89 days past due	16,174	41,049
Purchased impaired	63,446	78,105
Nonaccrual	26,303	106,325
Loans and leases, net of unearned discount	2,184,627	2,643,333
Other commercial construction [Member] \| Non-Acquired Financing Receivable [Member]
Summary of current, past due and nonaccrual loans
90 days or more past due and accruing	4,352	968
Other commercial construction [Member] \| Acquired Financing Receivable [Member]
Summary of current, past due and nonaccrual loans
90 days or more past due and accruing	23,158	23,582
Residential real estate excluding Alt-A [Member]
Summary of current, past due and nonaccrual loans
Current	8,563,870	6,626,182
30-89 days past due	252,076	256,017
Purchased impaired	47,135	56,741
Nonaccrual	174,937	172,681
Loans and leases, net of unearned discount	9,330,815	7,400,075
Residential real estate excluding Alt-A [Member] \| Non-Acquired Financing Receivable [Member]
Summary of current, past due and nonaccrual loans
90 days or more past due and accruing	251,750	250,472
Residential real estate excluding Alt-A [Member] \| Acquired Financing Receivable [Member]
Summary of current, past due and nonaccrual loans
90 days or more past due and accruing	41,047	37,982
Residential Alt-A [Member]
Summary of current, past due and nonaccrual loans
Current	355,574	383,834
30-89 days past due	24,221	34,077
Nonaccrual	100,915	105,179
Loans and leases, net of unearned discount	480,710	523,090
Home equity lines and loans [Member]
Summary of current, past due and nonaccrual loans
Current	6,384,785	6,570,675
30-89 days past due	41,795	43,516
Purchased impaired	4,381	4,635
Nonaccrual	54,509	47,150
Loans and leases, net of unearned discount	6,500,733	6,681,385
Home equity lines and loans [Member] \| Acquired Financing Receivable [Member]
Summary of current, past due and nonaccrual loans
90 days or more past due and accruing	15,263	15,409
Automobile [Member]
Summary of current, past due and nonaccrual loans
Current	2,490,590	2,644,330
30-89 days past due	34,961	48,342
Nonaccrual	24,482	26,835
Loans and leases, net of unearned discount	2,550,294	2,720,108
Automobile [Member] \| Acquired Financing Receivable [Member]
Summary of current, past due and nonaccrual loans
90 days or more past due and accruing	261	601
Other [Member]
Summary of current, past due and nonaccrual loans
Current	2,628,257	2,551,225
30-89 days past due	38,085	43,547
Purchased impaired	296	310
Nonaccrual	20,100	23,126
Loans and leases, net of unearned discount	2,694,426	2,625,797
Other [Member] \| Non-Acquired Financing Receivable [Member]
Summary of current, past due and nonaccrual loans
90 days or more past due and accruing	4,700	5,249
Other [Member] \| Acquired Financing Receivable [Member]
Summary of current, past due and nonaccrual loans
90 days or more past due and accruing	$ 2,988	$ 2,340

Loans and leases and the allowance for credit losses (Details 3) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Changes in the allowance for credit losses
Beginning balance	$ 909,006	$ 903,703	$ 908,290	$ 902,941
Provision for credit losses	60,000	63,000	109,000	138,000
Net charge-offs
Charge-offs	(64,162)	(71,650)	(124,438)	(154,744)
Recoveries	12,184	12,536	24,176	21,392
Net charge-offs	(51,978)	(59,114)	(100,262)	(133,352)
Ending balance	917,028	907,589	917,028	907,589
Commercial, financial, leasing [Member]
Changes in the allowance for credit losses
Beginning balance	239,273	215,659	234,022	212,579
Provision for credit losses	19,103	6,870	29,224	21,812
Net charge-offs
Charge-offs	(16,078)	(14,923)	(24,115)	(28,950)
Recoveries	2,430	2,273	5,597	4,438
Net charge-offs	(13,648)	(12,650)	(18,518)	(24,512)
Ending balance	244,728	209,879	244,728	209,879
Real Estate Commercial [Member]
Changes in the allowance for credit losses
Beginning balance	356,554	391,107	367,637	400,562
Provision for credit losses	(3,309)	22,735	(5,569)	37,510
Net charge-offs
Charge-offs	(13,056)	(15,915)	(23,596)	(40,494)
Recoveries	1,332	3,184	3,049	3,533
Net charge-offs	(11,724)	(12,731)	(20,547)	(36,961)
Ending balance	341,521	401,111	341,521	401,111
Residential real estate [Member]
Changes in the allowance for credit losses
Beginning balance	97,301	87,526	91,915	86,351
Provision for credit losses	5,587	13,654	21,817	29,495
Net charge-offs
Charge-offs	(11,407)	(15,872)	(24,125)	(32,039)
Recoveries	1,788	2,033	3,662	3,534
Net charge-offs	(9,619)	(13,839)	(20,463)	(28,505)
Ending balance	93,269	87,341	93,269	87,341
Consumer [Member]
Changes in the allowance for credit losses
Beginning balance	142,912	137,351	143,121	133,067
Provision for credit losses	38,427	19,852	61,965	47,616
Net charge-offs
Charge-offs	(23,621)	(24,940)	(52,602)	(53,261)
Recoveries	6,634	5,046	11,868	9,887
Net charge-offs	(16,987)	(19,894)	(40,734)	(43,374)
Ending balance	164,352	137,309	164,352	137,309
Unallocated [Member]
Changes in the allowance for credit losses
Beginning balance	72,966	72,060	71,595	70,382
Provision for credit losses	192	(111)	1,563	1,567
Net charge-offs
Charge-offs
Recoveries
Net charge-offs
Ending balance	$ 73,158	$ 71,949	$ 73,158	$ 71,949

Loans and leases and the allowance for credit losses (Details 4) - USD ($) $ in Thousands	Jun. 30, 2012	Dec. 31, 2011
Impaired loans and leases
Recorded Investment	$ 1,043,996	$ 1,123,315
Unpaid Principal Balance	1,331,869	1,440,333
Related Allowance	154,396	168,001
Impaired Financing Receivable With Recorded Allowance [Member]
Impaired loans and leases
Recorded Investment	770,780	724,725
Unpaid Principal Balance	974,217	934,731
Related Allowance	154,396	168,001
Impaired Financing Receivable with No Related Allowance [Member]
Impaired loans and leases
Recorded Investment	273,216	398,590
Unpaid Principal Balance	357,652	505,602
Related Allowance
Commercial, financial, leasing [Member]
Impaired loans and leases
Recorded Investment	161,849	171,642
Unpaid Principal Balance	191,950	206,288
Related Allowance	39,134	48,674
Commercial, financial, leasing [Member] \| Impaired Financing Receivable With Recorded Allowance [Member]
Impaired loans and leases
Recorded Investment	118,670	118,538
Unpaid Principal Balance	139,477	145,510
Related Allowance	39,134	48,674
Commercial, financial, leasing [Member] \| Impaired Financing Receivable with No Related Allowance [Member]
Impaired loans and leases
Recorded Investment	43,179	53,104
Unpaid Principal Balance	52,473	60,778
Related Allowance
Commercial real estate loans [Member]
Impaired loans and leases
Recorded Investment	179,294	174,522
Unpaid Principal Balance	227,836	219,574
Related Allowance	19,323	17,651
Commercial real estate loans [Member] \| Impaired Financing Receivable With Recorded Allowance [Member]
Impaired loans and leases
Recorded Investment	116,765	102,886
Unpaid Principal Balance	148,232	128,456
Related Allowance	19,323	17,651
Commercial real estate loans [Member] \| Impaired Financing Receivable with No Related Allowance [Member]
Impaired loans and leases
Recorded Investment	62,529	71,636
Unpaid Principal Balance	79,604	91,118
Related Allowance
Residential builder and developer [Member]
Impaired loans and leases
Recorded Investment	246,126	292,449
Unpaid Principal Balance	372,543	458,146
Related Allowance	33,490	52,562
Residential builder and developer [Member] \| Impaired Financing Receivable With Recorded Allowance [Member]
Impaired loans and leases
Recorded Investment	135,172	159,293
Unpaid Principal Balance	243,663	280,869
Related Allowance	33,490	52,562
Residential builder and developer [Member] \| Impaired Financing Receivable with No Related Allowance [Member]
Impaired loans and leases
Recorded Investment	110,954	133,156
Unpaid Principal Balance	128,880	177,277
Related Allowance
Other commercial construction [Member]
Impaired loans and leases
Recorded Investment	86,053	106,886
Unpaid Principal Balance	98,796	114,501
Related Allowance	12,404	3,836
Other commercial construction [Member] \| Impaired Financing Receivable With Recorded Allowance [Member]
Impaired loans and leases
Recorded Investment	81,077	20,234
Unpaid Principal Balance	89,410	24,639
Related Allowance	12,404	3,836
Other commercial construction [Member] \| Impaired Financing Receivable with No Related Allowance [Member]
Impaired loans and leases
Recorded Investment	4,976	86,652
Unpaid Principal Balance	9,386	89,862
Related Allowance
Residential real estate excluding Alt-A [Member]
Impaired loans and leases
Recorded Investment	126,157	121,568
Unpaid Principal Balance	151,962	145,123
Related Allowance	4,332	4,420
Residential real estate excluding Alt-A [Member] \| Impaired Financing Receivable With Recorded Allowance [Member]
Impaired loans and leases
Recorded Investment	108,167	101,882
Unpaid Principal Balance	127,032	119,498
Related Allowance	4,332	4,420
Residential real estate excluding Alt-A [Member] \| Impaired Financing Receivable with No Related Allowance [Member]
Impaired loans and leases
Recorded Investment	17,990	19,686
Unpaid Principal Balance	24,930	25,625
Related Allowance
Residential Alt-A [Member]
Impaired loans and leases
Recorded Investment	170,583	184,752
Unpaid Principal Balance	213,228	223,920
Related Allowance	23,000	25,000
Residential Alt-A [Member] \| Impaired Financing Receivable With Recorded Allowance [Member]
Impaired loans and leases
Recorded Investment	136,995	150,396
Unpaid Principal Balance	150,849	162,978
Related Allowance	23,000	25,000
Residential Alt-A [Member] \| Impaired Financing Receivable with No Related Allowance [Member]
Impaired loans and leases
Recorded Investment	33,588	34,356
Unpaid Principal Balance	62,379	60,942
Related Allowance
Home equity lines and loans [Member]
Impaired loans and leases
Recorded Investment	11,707	9,385
Unpaid Principal Balance	13,327	10,670
Related Allowance	2,986	2,306
Home equity lines and loans [Member] \| Impaired Financing Receivable With Recorded Allowance [Member]
Impaired loans and leases
Recorded Investment	11,707	9,385
Unpaid Principal Balance	13,327	10,670
Related Allowance	2,986	2,306
Automobile [Member]
Impaired loans and leases
Recorded Investment	51,649	53,710
Unpaid Principal Balance	51,649	53,710
Related Allowance	15,324	11,468
Automobile [Member] \| Impaired Financing Receivable With Recorded Allowance [Member]
Impaired loans and leases
Recorded Investment	51,649	53,710
Unpaid Principal Balance	51,649	53,710
Related Allowance	15,324	11,468
Other [Member]
Impaired loans and leases
Recorded Investment	10,578	8,401
Unpaid Principal Balance	10,578	8,401
Related Allowance	4,403	2,084
Other [Member] \| Impaired Financing Receivable With Recorded Allowance [Member]
Impaired loans and leases
Recorded Investment	10,578	8,401
Unpaid Principal Balance	10,578	8,401
Related Allowance	$ 4,403	$ 2,084

Loans and leases and the allowance for credit losses (Details 5) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Interest income recognized on loans
Average Recorded Investment	$ 1,087,554	$ 1,130,660	$ 1,100,021	$ 1,146,942
Interest Income Recognized, Total	11,415	5,941	16,995	12,544
Interest Income Recognized, Cash Basis	8,693	2,714	11,452	5,943
Commercial, financial, leasing [Member]
Interest income recognized on loans
Average Recorded Investment	161,311	162,827	164,779	167,456
Interest Income Recognized, Total	743	679	1,152	1,672
Interest Income Recognized, Cash Basis	743	666	1,152	1,654
Commercial real estate loans [Member]
Interest income recognized on loans
Average Recorded Investment	180,199	194,508	179,213	191,472
Interest Income Recognized, Total	1,238	513	1,556	895
Interest Income Recognized, Cash Basis	1,238	483	1,556	822
Residential builder and developer [Member]
Interest income recognized on loans
Average Recorded Investment	262,254	308,709	271,903	317,054
Interest Income Recognized, Total	385	314	726	839
Interest Income Recognized, Cash Basis	252	112	431	240
Other commercial construction [Member]
Interest income recognized on loans
Average Recorded Investment	109,037	93,980	107,151	103,751
Interest Income Recognized, Total	4,840	187	5,010	697
Interest Income Recognized, Cash Basis	4,840	150	5,010	471
Residential real estate excluding Alt-A [Member]
Interest income recognized on loans
Average Recorded Investment	127,258	97,317	126,880	90,813
Interest Income Recognized, Total	1,315	1,029	2,657	2,026
Interest Income Recognized, Cash Basis	810	565	1,688	1,140
Residential Alt-A [Member]
Interest income recognized on loans
Average Recorded Investment	174,181	199,056	177,623	202,339
Interest Income Recognized, Total	1,753	1,991	3,596	3,986
Interest Income Recognized, Cash Basis	527	410	1,073	961
Home equity lines and loans [Member]
Interest income recognized on loans
Average Recorded Investment	11,237	12,069	10,593	12,098
Interest Income Recognized, Total	164	189	330	349
Interest Income Recognized, Cash Basis	46	23	88	48
Automobile [Member]
Interest income recognized on loans
Average Recorded Investment	52,200	58,650	52,799	58,655
Interest Income Recognized, Total	871	984	1,769	1,968
Interest Income Recognized, Cash Basis	190	292	368	588
Other [Member]
Interest income recognized on loans
Average Recorded Investment	9,877	3,544	9,080	3,304
Interest Income Recognized, Total	106	55	199	112
Interest Income Recognized, Cash Basis	$ 47	$ 13	$ 86	$ 19

Loans and leases and the allowance for credit losses (Details 6) - USD ($) $ in Thousands	Jun. 30, 2012	Dec. 31, 2011
Summary of Loan grades
Loans and leases, net of unearned discount	$ 62,851,272	$ 60,096,005
Commercial, financial, leasing [Member]
Summary of Loan grades
Loans and leases, net of unearned discount	16,395,587	15,734,436
Commercial Real Estate Excluding Residential Builder and Developer and Other Construction [Member]
Summary of Loan grades
Loans and leases, net of unearned discount	21,380,406	20,259,448
Residential builder and developer [Member]
Summary of Loan grades
Loans and leases, net of unearned discount	1,333,674	1,508,333
Other commercial construction [Member]
Summary of Loan grades
Loans and leases, net of unearned discount	2,184,627	2,643,333
Pass [Member] \| Commercial, financial, leasing [Member]
Summary of Loan grades
Loans and leases, net of unearned discount	15,499,951	14,869,636
Pass [Member] \| Commercial Real Estate Excluding Residential Builder and Developer and Other Construction [Member]
Summary of Loan grades
Loans and leases, net of unearned discount	20,403,488	19,089,252
Pass [Member] \| Residential builder and developer [Member]
Summary of Loan grades
Loans and leases, net of unearned discount	989,903	1,085,970
Pass [Member] \| Other commercial construction [Member]
Summary of Loan grades
Loans and leases, net of unearned discount	1,903,981	2,254,609
Criticized Accrual [Member] \| Commercial, financial, leasing [Member]
Summary of Loan grades
Loans and leases, net of unearned discount	742,080	701,202
Criticized Accrual [Member] \| Commercial Real Estate Excluding Residential Builder and Developer and Other Construction [Member]
Summary of Loan grades
Loans and leases, net of unearned discount	803,640	999,085
Criticized Accrual [Member] \| Residential builder and developer [Member]
Summary of Loan grades
Loans and leases, net of unearned discount	103,523	140,787
Criticized Accrual [Member] \| Other commercial construction [Member]
Summary of Loan grades
Loans and leases, net of unearned discount	254,343	282,399
Criticized Nonaccrual [Member] \| Commercial, financial, leasing [Member]
Summary of Loan grades
Loans and leases, net of unearned discount	153,556	163,598
Criticized Nonaccrual [Member] \| Commercial Real Estate Excluding Residential Builder and Developer and Other Construction [Member]
Summary of Loan grades
Loans and leases, net of unearned discount	173,278	171,111
Criticized Nonaccrual [Member] \| Residential builder and developer [Member]
Summary of Loan grades
Loans and leases, net of unearned discount	240,248	281,576
Criticized Nonaccrual [Member] \| Other commercial construction [Member]
Summary of Loan grades
Loans and leases, net of unearned discount	$ 26,303	$ 106,325

- Definition

Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

+ References + Details

Loans and leases and the allowance for credit losses (Details 7) - USD ($) $ in Thousands	Jun. 30, 2012	Dec. 31, 2011
Allocation of allowance for credit losses on the basis of the Company's impairment methodology
Allowance for credit losses	$ 917,028	$ 908,290
Unallocated [Member]
Allocation of allowance for credit losses on the basis of the Company's impairment methodology
Allowance for credit losses	73,158	71,595
Allocated [Member]
Allocation of allowance for credit losses on the basis of the Company's impairment methodology
Allowance for credit losses	843,870	836,695
Allocated [Member] \| Commercial, financial, leasing [Member]
Allocation of allowance for credit losses on the basis of the Company's impairment methodology
Allowance for credit losses	244,728	234,022
Allocated [Member] \| Commercial real estate loans [Member]
Allocation of allowance for credit losses on the basis of the Company's impairment methodology
Allowance for credit losses	341,521	367,637
Allocated [Member] \| Residential real estate [Member]
Allocation of allowance for credit losses on the basis of the Company's impairment methodology
Allowance for credit losses	93,269	91,915
Allocated [Member] \| Consumer loans [Member]
Allocation of allowance for credit losses on the basis of the Company's impairment methodology
Allowance for credit losses	164,352	143,121
Individually evaluated for impairment [Member]
Allocation of allowance for credit losses on the basis of the Company's impairment methodology
Allowance for credit losses	153,075	165,579
Individually evaluated for impairment [Member] \| Commercial, financial, leasing [Member]
Allocation of allowance for credit losses on the basis of the Company's impairment methodology
Allowance for credit losses	38,961	48,517
Individually evaluated for impairment [Member] \| Commercial real estate loans [Member]
Allocation of allowance for credit losses on the basis of the Company's impairment methodology
Allowance for credit losses	64,143	71,784
Individually evaluated for impairment [Member] \| Residential real estate [Member]
Allocation of allowance for credit losses on the basis of the Company's impairment methodology
Allowance for credit losses	27,258	29,420
Individually evaluated for impairment [Member] \| Consumer loans [Member]
Allocation of allowance for credit losses on the basis of the Company's impairment methodology
Allowance for credit losses	22,713	15,858
Collectively Evaluated For Impairment [Member]
Allocation of allowance for credit losses on the basis of the Company's impairment methodology
Allowance for credit losses	684,606	663,674
Collectively Evaluated For Impairment [Member] \| Commercial, financial, leasing [Member]
Allocation of allowance for credit losses on the basis of the Company's impairment methodology
Allowance for credit losses	205,594	185,048
Collectively Evaluated For Impairment [Member] \| Commercial real estate loans [Member]
Allocation of allowance for credit losses on the basis of the Company's impairment methodology
Allowance for credit losses	275,671	291,271
Collectively Evaluated For Impairment [Member] \| Residential real estate [Member]
Allocation of allowance for credit losses on the basis of the Company's impairment methodology
Allowance for credit losses	62,182	60,742
Collectively Evaluated For Impairment [Member] \| Consumer loans [Member]
Allocation of allowance for credit losses on the basis of the Company's impairment methodology
Allowance for credit losses	141,159	126,613
Purchased Impaired [Member]
Allocation of allowance for credit losses on the basis of the Company's impairment methodology
Allowance for credit losses	6,189	7,442
Purchased Impaired [Member] \| Commercial, financial, leasing [Member]
Allocation of allowance for credit losses on the basis of the Company's impairment methodology
Allowance for credit losses	173	457
Purchased Impaired [Member] \| Commercial real estate loans [Member]
Allocation of allowance for credit losses on the basis of the Company's impairment methodology
Allowance for credit losses	1,707	4,582
Purchased Impaired [Member] \| Residential real estate [Member]
Allocation of allowance for credit losses on the basis of the Company's impairment methodology
Allowance for credit losses	3,829	1,753
Purchased Impaired [Member] \| Consumer loans [Member]
Allocation of allowance for credit losses on the basis of the Company's impairment methodology
Allowance for credit losses	$ 480	$ 650

Loans and leases and the allowance for credit losses (Details 8) - USD ($) $ in Thousands	Jun. 30, 2012	Dec. 31, 2011
Recorded investment in loans and leases on the basis of the Company's impairment methodology
Loans and leases, net of unearned discount	$ 62,851,272	$ 60,096,005
Commercial, financial, leasing [Member]
Recorded investment in loans and leases on the basis of the Company's impairment methodology
Loans and leases, net of unearned discount	16,395,587	15,734,436
Commercial real estate loans [Member]
Recorded investment in loans and leases on the basis of the Company's impairment methodology
Loans and leases, net of unearned discount	24,898,707	24,411,114
Residential real estate [Member]
Recorded investment in loans and leases on the basis of the Company's impairment methodology
Loans and leases, net of unearned discount	9,811,525	7,923,165
Consumer loans [Member]
Recorded investment in loans and leases on the basis of the Company's impairment methodology
Loans and leases, net of unearned discount	11,745,453	12,027,290
Individually evaluated for impairment [Member]
Recorded investment in loans and leases on the basis of the Company's impairment methodology
Loans and leases, net of unearned discount	1,035,198	1,110,873
Individually evaluated for impairment [Member] \| Commercial, financial, leasing [Member]
Recorded investment in loans and leases on the basis of the Company's impairment methodology
Loans and leases, net of unearned discount	161,669	171,442
Individually evaluated for impairment [Member] \| Commercial real estate loans [Member]
Recorded investment in loans and leases on the basis of the Company's impairment methodology
Loans and leases, net of unearned discount	504,281	561,615
Individually evaluated for impairment [Member] \| Residential real estate [Member]
Recorded investment in loans and leases on the basis of the Company's impairment methodology
Loans and leases, net of unearned discount	295,314	306,320
Individually evaluated for impairment [Member] \| Consumer loans [Member]
Recorded investment in loans and leases on the basis of the Company's impairment methodology
Loans and leases, net of unearned discount	73,934	71,496
Collectively Evaluated For Impairment [Member]
Recorded investment in loans and leases on the basis of the Company's impairment methodology
Loans and leases, net of unearned discount	61,255,374	58,331,770
Collectively Evaluated For Impairment [Member] \| Commercial, financial, leasing [Member]
Recorded investment in loans and leases on the basis of the Company's impairment methodology
Loans and leases, net of unearned discount	16,217,494	15,539,232
Collectively Evaluated For Impairment [Member] \| Commercial real estate loans [Member]
Recorded investment in loans and leases on the basis of the Company's impairment methodology
Loans and leases, net of unearned discount	23,901,962	23,281,585
Collectively Evaluated For Impairment [Member] \| Residential real estate [Member]
Recorded investment in loans and leases on the basis of the Company's impairment methodology
Loans and leases, net of unearned discount	9,469,076	7,560,104
Collectively Evaluated For Impairment [Member] \| Consumer loans [Member]
Recorded investment in loans and leases on the basis of the Company's impairment methodology
Loans and leases, net of unearned discount	11,666,842	11,950,849
Purchased Impaired [Member]
Recorded investment in loans and leases on the basis of the Company's impairment methodology
Loans and leases, net of unearned discount	560,700	653,362
Purchased Impaired [Member] \| Commercial, financial, leasing [Member]
Recorded investment in loans and leases on the basis of the Company's impairment methodology
Loans and leases, net of unearned discount	16,424	23,762
Purchased Impaired [Member] \| Commercial real estate loans [Member]
Recorded investment in loans and leases on the basis of the Company's impairment methodology
Loans and leases, net of unearned discount	492,464	567,914
Purchased Impaired [Member] \| Residential real estate [Member]
Recorded investment in loans and leases on the basis of the Company's impairment methodology
Loans and leases, net of unearned discount	47,135	56,741
Purchased Impaired [Member] \| Consumer loans [Member]
Recorded investment in loans and leases on the basis of the Company's impairment methodology
Loans and leases, net of unearned discount	$ 4,677	$ 4,945

- Definition

+ References + Details

Loans and leases and the allowance for credit losses (Details 9) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2012 USD ($) Modification	Jun. 30, 2011 USD ($) Modification	Jun. 30, 2012 USD ($) Modification	Jun. 30, 2011 USD ($) Modification
Loan modification activities that were considered troubled debt restructurings
Number of modifications \| Modification	384	458	829	943
Pre-modification Recorded Investment	$ 89,684	$ 41,651	$ 116,312	$ 189,602
Post-modification Recorded Investment	88,494	40,830	115,155	181,279
Financial effects of modification recorded investment	(1,190)	(821)	(1,157)	(8,323)
Financial effects of modification interest	$ (710)	$ (927)	$ (1,193)	$ (2,439)
Principal deferral [Member] \| Commercial, financial, leasing [Member]
Loan modification activities that were considered troubled debt restructurings
Number of modifications \| Modification	9	20	18	33
Pre-modification Recorded Investment	$ 10,392	$ 5,932	$ 13,204	$ 7,281
Post-modification Recorded Investment	9,061	5,947	12,015	7,281
Financial effects of modification recorded investment	(1,331)	15	(1,189)
Financial effects of modification interest
Principal deferral [Member] \| Commercial real estate loans [Member]
Loan modification activities that were considered troubled debt restructurings
Number of modifications \| Modification	1	9	3	18
Pre-modification Recorded Investment	$ 2,011	$ 5,226	$ 4,436	$ 11,851
Post-modification Recorded Investment	1,999	5,143	4,404	11,740
Financial effects of modification recorded investment	(12)	(83)	(32)	(111)
Financial effects of modification interest
Principal deferral [Member] \| Residential builder and developer [Member]
Loan modification activities that were considered troubled debt restructurings
Number of modifications \| Modification	3	3	8	4
Pre-modification Recorded Investment	$ 2,503	$ 15,162	$ 9,325	$ 18,586
Post-modification Recorded Investment	2,503	14,237	8,537	17,661
Financial effects of modification recorded investment		(925)	(788)	(925)
Financial effects of modification interest
Principal deferral [Member] \| Other commercial construction [Member]
Loan modification activities that were considered troubled debt restructurings
Number of modifications \| Modification	3		3	1
Pre-modification Recorded Investment	$ 60,888		$ 60,888	$ 2,275
Post-modification Recorded Investment	60,898		60,898	2,269
Financial effects of modification recorded investment	10		10	(6)
Financial effects of modification interest
Principal deferral [Member] \| Residential real estate excluding Alt-A [Member]
Loan modification activities that were considered troubled debt restructurings
Number of modifications \| Modification	7	9	22	12
Pre-modification Recorded Investment	$ 1,059	$ 646	$ 2,564	$ 770
Post-modification Recorded Investment	1,087	622	2,675	760
Financial effects of modification recorded investment	28	(24)	111	(10)
Financial effects of modification interest
Principal deferral [Member] \| Residential Alt-A [Member]
Loan modification activities that were considered troubled debt restructurings
Number of modifications \| Modification	1	1	4	1
Pre-modification Recorded Investment	$ 153	$ 73	$ 550	$ 73
Post-modification Recorded Investment	158	76	565	76
Financial effects of modification recorded investment	5	3	15	3
Financial effects of modification interest
Principal deferral [Member] \| Home equity lines and loans [Member]
Loan modification activities that were considered troubled debt restructurings
Number of modifications \| Modification	9	1	10	1
Pre-modification Recorded Investment	$ 734	$ 69	$ 851	$ 69
Post-modification Recorded Investment	734	69	851	69
Financial effects of modification recorded investment
Financial effects of modification interest
Principal deferral [Member] \| Automobile [Member]
Loan modification activities that were considered troubled debt restructurings
Number of modifications \| Modification	196	217	349	421
Pre-modification Recorded Investment	$ 2,700	$ 2,845	$ 4,585	$ 6,338
Post-modification Recorded Investment	2,700	2,845	4,585	6,338
Financial effects of modification recorded investment
Financial effects of modification interest
Principal deferral [Member] \| Other [Member]
Loan modification activities that were considered troubled debt restructurings
Number of modifications \| Modification	7	3	59	13
Pre-modification Recorded Investment	$ 134	$ 88	$ 781	$ 162
Post-modification Recorded Investment	134	88	781	162
Financial effects of modification recorded investment
Financial effects of modification interest
Other [Member] \| Commercial, financial, leasing [Member]
Loan modification activities that were considered troubled debt restructurings
Number of modifications \| Modification	2		3
Pre-modification Recorded Investment	$ 1,995		$ 2,967
Post-modification Recorded Investment	1,954		3,052
Financial effects of modification recorded investment	(41)		85
Financial effects of modification interest
Other [Member] \| Residential builder and developer [Member]
Loan modification activities that were considered troubled debt restructurings
Number of modifications \| Modification		1		5
Pre-modification Recorded Investment		$ 412		$ 116,414
Post-modification Recorded Investment		412		108,806
Financial effects of modification recorded investment				(7,608)
Financial effects of modification interest
Other [Member] \| Automobile [Member]
Loan modification activities that were considered troubled debt restructurings
Number of modifications \| Modification	21	31	31	57
Pre-modification Recorded Investment	$ 152	$ 151	$ 171	$ 258
Post-modification Recorded Investment	152	151	171	258
Financial effects of modification recorded investment
Financial effects of modification interest
Other [Member] \| Other [Member]
Loan modification activities that were considered troubled debt restructurings
Number of modifications \| Modification			9	1
Pre-modification Recorded Investment			$ 49	$ 11
Post-modification Recorded Investment			49	11
Financial effects of modification recorded investment
Financial effects of modification interest
Interest Rate Reduction [Member] \| Commercial real estate loans [Member]
Loan modification activities that were considered troubled debt restructurings
Number of modifications \| Modification	1		1
Pre-modification Recorded Investment	$ 383		$ 383
Post-modification Recorded Investment	430		430
Financial effects of modification recorded investment	47		47
Financial effects of modification interest	$ (89)		$ (89)
Interest Rate Reduction [Member] \| Residential real estate excluding Alt-A [Member]
Loan modification activities that were considered troubled debt restructurings
Number of modifications \| Modification		3		11
Pre-modification Recorded Investment		$ 619		$ 1,678
Post-modification Recorded Investment		639		1,718
Financial effects of modification recorded investment		20		40
Financial effects of modification interest		$ (13)		$ (63)
Interest Rate Reduction [Member] \| Home equity lines and loans [Member]
Loan modification activities that were considered troubled debt restructurings
Number of modifications \| Modification			1
Pre-modification Recorded Investment			$ 144
Post-modification Recorded Investment			144
Financial effects of modification recorded investment
Financial effects of modification interest			$ (6)
Interest Rate Reduction [Member] \| Automobile [Member]
Loan modification activities that were considered troubled debt restructurings
Number of modifications \| Modification	3	7	7	11
Pre-modification Recorded Investment	$ 20	$ 87	$ 77	$ 131
Post-modification Recorded Investment	20	87	77	131
Financial effects of modification recorded investment
Financial effects of modification interest	$ (1)	$ (5)	$ (5)	$ (8)
Interest Rate Reduction [Member] \| Other [Member]
Loan modification activities that were considered troubled debt restructurings
Number of modifications \| Modification			3
Pre-modification Recorded Investment			$ 23
Post-modification Recorded Investment			23
Financial effects of modification recorded investment
Financial effects of modification interest			$ (3)
Combination of concession types [Member] \| Commercial, financial, leasing [Member]
Loan modification activities that were considered troubled debt restructurings
Number of modifications \| Modification		1	1	1
Pre-modification Recorded Investment		$ 1,945	$ 45	$ 1,945
Post-modification Recorded Investment		1,945	44	1,945
Financial effects of modification recorded investment			(1)
Financial effects of modification interest		$ (641)	$ (33)	$ (641)
Combination of concession types [Member] \| Commercial real estate loans [Member]
Loan modification activities that were considered troubled debt restructurings
Number of modifications \| Modification	4		4
Pre-modification Recorded Investment	$ 1,210		$ 1,210
Post-modification Recorded Investment	1,231		1,231
Financial effects of modification recorded investment	21		21
Financial effects of modification interest	$ (256)		$ (256)
Combination of concession types [Member] \| Residential builder and developer [Member]
Loan modification activities that were considered troubled debt restructurings
Number of modifications \| Modification			2	1
Pre-modification Recorded Investment			$ 2,350	$ 798
Post-modification Recorded Investment			2,726	790
Financial effects of modification recorded investment			376	(8)
Financial effects of modification interest
Combination of concession types [Member] \| Residential real estate excluding Alt-A [Member]
Loan modification activities that were considered troubled debt restructurings
Number of modifications \| Modification	11	29	29	59
Pre-modification Recorded Investment	$ 2,049	$ 5,187	$ 4,985	$ 13,094
Post-modification Recorded Investment	2,098	5,342	5,105	13,341
Financial effects of modification recorded investment	49	155	120	247
Financial effects of modification interest	$ (65)	$ (56)	$ (265)	$ (813)
Combination of concession types [Member] \| Residential Alt-A [Member]
Loan modification activities that were considered troubled debt restructurings
Number of modifications \| Modification	7	6	15	15
Pre-modification Recorded Investment	$ 1,509	$ 1,260	$ 2,869	$ 2,862
Post-modification Recorded Investment	1,543	1,278	2,937	2,916
Financial effects of modification recorded investment	34	18	68	54
Financial effects of modification interest	$ (44)	$ (21)	$ (49)	$ (231)
Combination of concession types [Member] \| Home equity lines and loans [Member]
Loan modification activities that were considered troubled debt restructurings
Number of modifications \| Modification	4	8	6	10
Pre-modification Recorded Investment	$ 480	$ 719	$ 715	$ 789
Post-modification Recorded Investment	480	719	715	790
Financial effects of modification recorded investment				1
Financial effects of modification interest	$ (123)	$ (91)	$ (147)	$ (127)
Combination of concession types [Member] \| Automobile [Member]
Loan modification activities that were considered troubled debt restructurings
Number of modifications \| Modification	77	100	189	222
Pre-modification Recorded Investment	$ 1,170	$ 1,139	$ 2,779	$ 4,000
Post-modification Recorded Investment	1,170	1,139	2,779	4,000
Financial effects of modification recorded investment
Financial effects of modification interest	$ (110)	$ (80)	$ (282)	$ (516)
Combination of concession types [Member] \| Other [Member]
Loan modification activities that were considered troubled debt restructurings
Number of modifications \| Modification	18	9	52	46
Pre-modification Recorded Investment	$ 142	$ 91	$ 361	$ 217
Post-modification Recorded Investment	142	91	361	217
Financial effects of modification recorded investment
Financial effects of modification interest	$ (22)	$ (20)	$ (58)	$ (40)

Loans and leases and the allowance for credit losses (Details Textual) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011	Mar. 31, 2012	Dec. 31, 2010
Loans and Leases Receivable [Line Items]
Interest income	$ 89,870		$ 171,257
Accretable yield balance	788,760		$ 788,760		$ 838,765	$ 770,031
Loans and leases and allowance for credit losses (Details) (Textual) [Abstract]
Purchased impaired loans as a percentage of total assets			Less than 1% of company's assets		Less than 1% of company's assets
Contractual principal and interest payments	561,000		$ 561,000		$ 653,000
Transfer from nonaccretable to accretable yield			$ 140,000
Loan delinquent period			90 days
Maturity period of line of credit			more than 150 days
Acquired Loans [Member]
Loans and Leases Receivable [Line Items]
Interest income	$ 90,000	$ 69,000	$ 171,000	$ 110,000
Accretable yield balance		$ 1,040,000		$ 1,040,000			$ 457,000
Percentage of improvement in acquired loans			1.00%

Borrowings (Details) - USD ($) $ in Millions	6 Months Ended
Borrowings (Details) - USD ($) $ in Millions	Jun. 30, 2012	Dec. 31, 2011
Schedule of Borrowings [Line Items]
Junior subordinated debentures	$ 1,200	$ 1,200
Borrowings (Textual) [Abstract]
Junior Subordinated Debentures Maturity Date	Jan. 31, 2068
Debt Maturity, Start Year	Jan. 01, 2027
Debt Maturity, End Year	Dec. 31, 2068
Rate on related enhanced trust preferred securities	8.50%
End date of restrictions included in the replacement capital covenant	Jan. 31, 2048
Period of days prior to redemption or repurchase of enhanced trust preferred securities applicable to provisions of the replacement capital covenant	180 days
Junior subordinated debentures face value	$ 1,200
Junior Subordinated Debenture due January 31, 2068 [Member]
Schedule of Borrowings [Line Items]
Junior subordinated debentures	$ 350

Shareholders' equity (Details) $ / shares in Units, $ in Thousands	1 Months Ended	6 Months Ended
	May 31, 2011 USD ($) shares	Jun. 30, 2012 USD ($) $ / shares $ / Share shares	Dec. 31, 2011 USD ($) $ / shares $ / Share shares
Issued and outstanding preferred stock
Preferred stock, shares issued		381,500	381,500
Carrying value \| $		$ 868,433	$ 864,585
Shareholders Equity (Textual) [Abstract]
Preferred stock, par value \| $ / shares		$ 1.00	$ 1.00
Liquidation preference \| $ / shares		$ 1,000	$ 1,000
Preferred stock, shares authorized		1,000,000	1,000,000
Preferred stock, shares redeemed	330,000,000
Limitation by U.S. Treasury on maximum amount of dividend to be paid per common stock quarterly \| $ / shares		$ 0.70
Redemption days of shares by Company	90 days
Series A Fixed Rate Cumulative Perpetual Preferred Stock [Member]
Issued and outstanding preferred stock
Preferred stock, shares issued		230,000
Carrying value \| $		$ 225,570	$ 224,277
Shareholders Equity (Textual) [Abstract]
Liquidation preference \| $ / shares		$ 1,000	$ 1,000
Series C Fixed Rate Cumulative Perpetual Preferred Stock [Member]
Issued and outstanding preferred stock
Preferred stock, shares issued		151,500
Carrying value \| $		$ 142,863	$ 140,308
Shareholders Equity (Textual) [Abstract]
Liquidation preference \| $ / shares		$ 1,000	$ 1,000
Series D Fixed Rate Non Cumulative Perpetual Preferred Stock [Member]
Issued and outstanding preferred stock
Preferred stock, shares issued		50,000
Carrying value \| $		$ 500,000	$ 500,000
Shareholders Equity (Textual) [Abstract]
Liquidation preference \| $ / shares		$ 10,000	$ 10,000
Ten Year Warrant Series A Preferred [Member]
Shareholders Equity (Textual) [Abstract]
Ten-year warrant to purchase common stock		1,218,522
Ten Year Warrant Series C Preferred [Member]
Shareholders Equity (Textual) [Abstract]
Ten-year warrant to purchase common stock		407,542
Ten Year Warrant Series D Preferred [Member]
Shareholders Equity (Textual) [Abstract]
Ten-year warrant to purchase common stock		95,383	95,383
Exercise price of each class of warrants or rights outstanding \| $ / Share		518.96	518.96
Series A [Member]
Shareholders Equity (Textual) [Abstract]
Exercise price of each class of warrants or rights outstanding \| $ / Share		73.86
Preferred stock, shares redeemed	370,000
Accelerated amortization of preferred stock discount as per redemption \| $	$ 11,200
Series C [Member]
Shareholders Equity (Textual) [Abstract]
Exercise price of each class of warrants or rights outstanding \| $ / Share		55.76
Series D [Member]
Shareholders Equity (Textual) [Abstract]
Preferred stock dividend rate	6.875%
Preferred series A and C first five years [Member]
Shareholders Equity (Textual) [Abstract]
Preferred stock dividend rate		5.00%
Preferred series A and C after five years [Member]
Shareholders Equity (Textual) [Abstract]
Preferred stock dividend rate		9.00%

Pension plans and other postretirement benefits (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Pension Benefits [Member]
Net periodic defined benefit cost for defined benefit plans
Service cost	$ 6,875	$ 6,413	$ 14,775	$ 11,713
Interest cost on projected benefit obligation	15,418	14,086	31,018	26,236
Expected return on plan assets	(17,581)	(14,563)	(35,256)	(27,263)
Amortization of prior service cost	(1,629)	(1,629)	(3,279)	(3,279)
Amortization of net actuarial loss	9,183	5,165	18,583	10,265
Net periodic benefit cost	12,266	9,472	25,841	17,672
Other Postretirement Benefit Plans [Member]
Net periodic defined benefit cost for defined benefit plans
Service cost	159	115	334	240
Interest cost on projected benefit obligation	919	909	1,869	1,684
Amortization of prior service cost	10	29	10	54
Amortization of net actuarial loss	165	18	265	18
Net periodic benefit cost	$ 1,253	$ 1,071	$ 2,478	$ 1,996

- Definition

An amount calculated as a basis for determining the extent of delayed recognition of the effects of changes in the fair value of assets. The expected return on plan assets is determined based on the expected long-term rate of return on plan assets and the market-related value of plan assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 30
-Glossary Expected Return on Plan Assets
-URI http://asc.fasb.org/extlink&oid=6512136

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 60
-Glossary Expected Return on Plan Assets
-URI http://asc.fasb.org/extlink&oid=6512171

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (h)(3)
-URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 264
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph h
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 106
-Paragraph 518
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

- Definition

The increase in a defined benefit pension plan's projected benefit obligation or a defined benefit postretirement plan's accumulated postretirement benefit obligation due to the passage of time.

+ References + Details

- Definition

The actuarial present value of benefits attributed by the pension benefit formula to services rendered by employees during the period. The portion of the expected postretirement benefit obligation attributed to employee service during the period. The service cost component is a portion of the benefit obligation and is unaffected by the funded status of the plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Service Cost (Component of Net Periodic Pension Cost)
-URI http://asc.fasb.org/extlink&oid=6525008

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (h)(1)
-URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 264
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph a, h
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 106
-Paragraph 518
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Pension plans and other postretirement benefits (Details Textual) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Pension plans and other postretirement benefits (Textual) [Abstract]
Defined contribution pension and retirement savings plans total expense	$ 11,390,000	$ 9,890,000	$ 26,015,000	$ 20,066,000

- Definition

The amount of pension and other (such as medical, dental and life insurance) postretirement benefit costs recognized during the period for (1) defined benefit plans (periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain (loss) on assets, prior service cost or credit, transition asset or obligation, and gain (loss) due to settlements or curtailments) and for (2) defined contribution plans (to the extent that a plan's defined contributions to an individual's account are to be made for periods in which that individual renders services, the net cost for a period is the contribution called for in that period; if a plan calls for contributions for periods after an individual retires or terminates, the estimated cost is accrued during the employee's service period).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.4)
-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 70
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6414718&loc=d3e28014-114942

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 28
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph h
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5, 11
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Earnings per common share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Income available to common shareholders:
Net income	$ 233,380	$ 322,358	$ 439,843	$ 528,631
Less: Preferred stock dividends	(13,362)	(7,184)	(26,725)	(17,682)
Amortization of preferred stock discount	(1,964)	(13,531)	(3,888)	(16,284)
Net income available to common equity	218,054	301,643	409,230	494,665
Less: Income attributable to unvested stock based compensation awards	(3,345)	(4,479)	(6,283)	(7,382)
Net income available to common shareholders	$ 214,709	$ 297,164	$ 402,947	$ 487,283
Weighted-average shares outstanding:
Common shares outstanding (including common stock issuable) and unvested stock-based compensation awards	127,445	124,035	127,301	122,522
Less: Unvested stock based compensation awards	(1,957)	(1,854)	(1,947)	(1,823)
Weighted-average shares outstanding	125,488	122,181	125,354	120,699
Basic earnings per common share	$ 1.71	$ 2.43	$ 3.21	$ 4.04

Earnings per common share (Details 1) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Computations of diluted earnings per common share
Net income available to common equity	$ 218,054	$ 301,643	$ 409,230	$ 494,665
Less: Income attributable to unvested stock based compensation awards	(3,338)	(4,464)	(6,272)	(7,357)
Net income available to common stockholders	$ 214,716	$ 297,179	$ 402,958	$ 487,308
Adjusted weighted-average shares outstanding:
Common and unvested stock-based compensation awards	127,445	124,035	127,301	122,522
Less: Unvested stock based compensation awards	(1,957)	(1,854)	(1,947)	(1,823)
Plus: Incremental shares from assumed conversion of stock-based compensation awards and convertible preferred stock	409	615	402	633
Adjusted weighted-average shares outstanding	125,897	122,796	125,756	121,332
Diluted earnings per common share	$ 1.71	$ 2.42	$ 3.20	$ 4.02
Earnings per common share (Textual) [Abstract]
Antidilutive securities excluded from computation of earnings per share	9,900	10,100	10,000	10,300

Comprehensive income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
Comprehensive income (Details) - USD ($) $ in Thousands	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Available-for-sale ("AFS") investment securities with other-than-temporary impairment ("OTTI"):
Unrealized holding losses, net, before-tax amount			$ (8,024)	$ (11,227)
Unrealized holding losses, net, income taxes			3,149	4,501
Unrealized holding losses, net, net of tax amount			(4,875)	(6,726)
Less: reclassification adjustment for gains realized in net income, before tax amount				3,814
Less: reclassification adjustment for gains realized in net income, income taxes				(1,497)
Less: reclassification adjustment for gains realized in net income, net				2,317
Less: OTTI charges recognized in net income, before tax amount			(22,304)	(32,071)
Less: OTTI charges recognized in net income, income taxes			8,754	12,587
Less: OTTI charges recognized in net income, net			(13,550)	(19,484)
Net change for AFS investment securities with OTTI, before tax			14,280	17,030
Net change for AFS investment securities with OTTI, income taxes			(5,605)	(6,589)
Net change for AFS investment securities with OTTI, after tax			8,675	10,441
AFS investment securities - all other:
Unrealized holding gains during period, net, before-tax amount			93,177	77,869
Unrealized holding gains during period, net, income taxes			(36,535)	(30,368)
Unrealized holding gains during period, net, net of tax amount			56,642	47,501
Less: reclassification adjustment for gains realized in net income, before-tax amount			(363)	146,115
Less: reclassification adjustment for gains realized in net income, income taxes			145	(57,257)
Less: reclassification adjustment for gains realized in net income, net			(218)	88,858
Net change for AFS investment securities - all other, before tax			93,540	(68,246)
Net change for AFS investment securities - all other, tax			(36,680)	26,889
Net change for AFS investment securities - all other, net of tax			56,860	(41,357)
Held-to-maturity ("HTM") investment securities with OTTI:
Unrealized holding gains on HTM securities, net, before-tax amount			(2,848)	(8,500)
Unrealized holding gains on HTM securities, net, income taxes			1,118	3,336
Unrealized holding gains on HTM securities, net, net of tax amount			(1,730)	(5,164)
Less: reclassification to income of unrealized holding losses, before tax			(1,497)	(12)
Less: reclassification to income of unrealized holding losses, tax			587	5
Less: reclassification to income of unrealized holding losses, net of tax			(910)	(7)
Less: OTTI charges recognized in net income, before tax			(5,355)	(10,500)
Less: OTTI charges recognized in net income, tax			2,102	4,121
Less: OTTI charges recognized in net income, net of tax			(3,253)	(6,379)
Net change for HTM investment securities with OTTI, before tax			4,004	2,012
Net change for HTM investment securities with OTTI, tax			(1,571)	(790)
Net change for HTM investment securities with OTTI, net of tax			2,433	1,222
Unrealized holding losses on investment securities previously transferred from AFS to HTM
Reclassification to income of unrealized holding losses on investment securities previously transferred from AFS to HTM, before tax			2,310	2,967
Reclassification to income of unrealized holding losses on investment securities previously transferred from AFS to HTM, Tax			(907)	(1,165)
Reclassification to income of unrealized holding losses on investment securities previously transferred from AFS to HTM, net of tax			1,403	1,802
Net unrealized gains (losses) on investment securities, before tax			114,134	(46,237)
Net unrealized gains (losses) on investment securities, income taxes			(44,763)	18,345
Net unrealized gains (losses) on investment securities, net of tax	$ 49,289	$ (33,550)	69,371	(27,892)
Reclassification to income for amortization of gains on terminated cash flow hedges , before tax			(178)	(224)
Reclassification to income for amortization of gains on terminated cash flow hedges, income taxes			66	83
Reclassification to income for amortization of gains on terminated cash flow hedges	(42)	(71)	(112)	(141)
Foreign currency translation adjustment, before tax			(208)	313
Foreign currency translation adjustment, tax			77	(117)
Foreign currency translation adjustment, net of tax	(533)	196	(131)	196
Defined benefit plans liability adjustment, before tax amount			15,579	7,058
Defined benefit plans liability adjustment, income taxes			(6,115)	(2,770)
Defined benefit plans liability adjustment	4,695	2,177	9,464	4,288
Total Comprehensive Income, before-tax amount			129,327	(39,090)
Total Comprehensive Income, income taxes			(50,735)	15,541
Total other comprehensive income	$ 53,409	$ (31,248)	$ 78,592	$ (23,549)

Comprehensive income (Details 1) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
Comprehensive income (Details 1) - USD ($) $ in Thousands	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Accumulated other comprehensive income (loss), net consisted of unrealized gains (losses)
Beginning Balance			$ (356,441)	$ (205,220)
Net gain (loss) during period	$ 53,409	$ (31,248)	78,592	(23,549)
Ending Balance	(277,849)	(228,769)	(277,849)	(228,769)
Cash flow hedges [Member]
Accumulated other comprehensive income (loss), net consisted of unrealized gains (losses)
Beginning Balance			112	393
Net gain (loss) during period			(112)	(141)
Ending Balance	0	252	0	252
Defined benefit plans [Member]
Accumulated other comprehensive income (loss), net consisted of unrealized gains (losses)
Beginning Balance			(277,716)	(120,892)
Net gain (loss) during period			9,464	4,288
Ending Balance	(268,252)	(116,604)	(268,252)	(116,604)
Accumulated Translation Adjustment [Member]
Accumulated other comprehensive income (loss), net consisted of unrealized gains (losses)
Beginning Balance			(803)	0
Net gain (loss) during period			(131)	196
Ending Balance	(934)	196	(934)	196
Investment securities with OTTI [Member]
Accumulated other comprehensive income (loss), net consisted of unrealized gains (losses)
Beginning Balance			(84,029)	(87,053)
Net gain (loss) during period			11,108	11,663
Ending Balance	(72,921)	(75,390)	(72,921)	(75,390)
Investment securities all other [Member]
Accumulated other comprehensive income (loss), net consisted of unrealized gains (losses)
Beginning Balance			5,995	2,332
Net gain (loss) during period			58,263	(39,555)
Ending Balance	$ 64,258	$ (37,223)	$ 64,258	$ (37,223)

- Definition

Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=20435746&loc=d3e637-108580

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 14
-URI http://asc.fasb.org/extlink&oid=20435746&loc=d3e681-108580

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 14A
-URI http://asc.fasb.org/extlink&oid=20435746&loc=SL7669686-108580

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 31
-Article 5

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS115-1/124-1
-Paragraph 15D
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Principles Board Opinion (APB)
-Number 12
-Paragraph 10
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 130
-Paragraph 14, 17, 26
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Article 3

+ Details

- Definition

Net of tax amount of other comprehensive income (loss) attributable to the parent entity.

+ References

+ Details

Derivative financial instruments (Details) - Fixed rate long-term borrowings [Member] - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2012	Dec. 31, 2011
Information about interest rate swap agreements
Notional amount	$ 900,000	$ 900,000
Average maturity (in years)	4 years 10 months 24 days	5 years 4 months 24 days
Weighted-average rate, fixed	6.07%	6.07%
Weighted-average rate, variable	2.01%	2.07%

Derivative financial instruments (Details 1) - USD ($) $ in Thousands	Jun. 30, 2012	Dec. 31, 2011
Information about fair values of derivative instruments in consolidated balance sheet
Asset derivatives, fair value	$ 644,741	$ 619,001
Liability derivatives, fair value	444,456	440,685
Designated as Hedging Instrument [Member]
Information about fair values of derivative instruments in consolidated balance sheet
Asset derivatives, fair value	150,393	147,534
Liability derivatives, fair value	5,274	2,287
Not Designated as Hedging Instrument [Member]
Information about fair values of derivative instruments in consolidated balance sheet
Asset derivatives, fair value	494,348	471,467
Liability derivatives, fair value	439,182	438,398
Interest rate swap agreements [Member] \| Designated as Hedging Instrument [Member]
Information about fair values of derivative instruments in consolidated balance sheet
Asset derivatives, fair value	149,947	147,302
Liability derivatives, fair value	0
Commitments to sell real estate loans [Member] \| Designated as Hedging Instrument [Member]
Information about fair values of derivative instruments in consolidated balance sheet
Asset derivatives, fair value	446	232
Liability derivatives, fair value	5,274	2,287
Commitments to sell real estate loans [Member] \| Not Designated as Hedging Instrument [Member]
Information about fair values of derivative instruments in consolidated balance sheet
Asset derivatives, fair value	992	1,328
Liability derivatives, fair value	9,021	2,771
Mortgage-related commitments to originate real estate loans for sale [Member] \| Not Designated as Hedging Instrument [Member]
Information about fair values of derivative instruments in consolidated balance sheet
Asset derivatives, fair value	34,111	7,991
Liability derivatives, fair value	60	1,068
Interest rate contracts [Member] \| Not Designated as Hedging Instrument [Member]
Information about fair values of derivative instruments in consolidated balance sheet
Asset derivatives, fair value	439,617	443,033
Liability derivatives, fair value	409,653	415,836
Foreign exchange and other option and futures contracts [Member] \| Not Designated as Hedging Instrument [Member]
Information about fair values of derivative instruments in consolidated balance sheet
Asset derivatives, fair value	19,628	19,115
Liability derivatives, fair value	$ 20,448	$ 18,723

Derivative financial instruments (Details 2) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Information about fair values of derivative instruments in consolidated statement of income
Derivatives not designated as hedging instruments, derivatives	$ (355)	$ 258	$ 74	$ 185
Interest rate swap agreements [Member] \| Fixed rate long-term borrowings [Member]
Information about fair values of derivative instruments in consolidated statement of income
Derivatives in fair value hedging relationships, derivatives	9,674	21,945	2,645	9,540
Derivatives in fair value hedging relationships, hedged item	(9,168)	(21,145)	(2,624)	(9,097)
Interest rate contracts [Member]
Information about fair values of derivative instruments in consolidated statement of income
Derivatives not designated as hedging instruments, derivatives	2,080	1,001	3,219	1,476
Foreign exchange and other option and futures contracts [Member]
Information about fair values of derivative instruments in consolidated statement of income
Derivatives not designated as hedging instruments, derivatives	$ (2,435)	$ (743)	$ (3,145)	$ (1,291)

Derivative financial instruments (Details Textual) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Derivative financial instruments (Textual) [Abstract]
Increase in net interest income due to interest rate swap agreements	$ 9	$ 9	$ 18	$ 19
Aggregate fair value of derivative financial instruments in a net liability position	329		329
Fair value of collateral posted for derivative financial instruments	303		303
Additional derivative financial instruments (Textual) [Abstract]
Notional value of foreign currency and other option and future contracts entered into trading purposes	1,400		1,400		$ 1,400
Net unrealized pre-tax gains related to hedged loans held for sale, commitments to originate loans for sale and commitments to sell loans			43		12
Fair value of Additional collateral to be posted for derivative financial instruments	69		69
Maximum amount of additional collateral required to post to counterparties	29		29
Interest rate swap counterparty collateral postings	69		69
Interest rate contracts [Member]
Derivative financial instruments (Textual) [Abstract]
Notional value of interest rate contracts entered into trading purposes	15,000		15,000		$ 13,900
Credit Risk Derivative [Member]
Derivative financial instruments (Textual) [Abstract]
Aggregate fair value of derivative financial instruments in a net liability position	$ 98		$ 98

Variable interest entities and asset securitizations (Details) - USD ($) $ in Millions	Jun. 30, 2012	Dec. 31, 2011
Variable interest entities and asset securitizations (Textual) [Abstract]
Carrying value of loans in the securitization trusts	$ 174	$ 196
Combined outstanding principal amount of mortgage backed securities issued by qualified special purpose trusts held by unrelated parties	26	30
Other assets for its "investment" in the common securities recognized by the company of various trusts	34
Maximum exposure to loss of investments in real estate partnerships	266	271
Unfunded commitments included in company's maximum exposure to loss of investments in real estate partnerships	73	75
Total assets of real estate partnerships in which the company invested	$ 1,400	$ 1,400

Fair value measurements (Details) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands	Jun. 30, 2012	Dec. 31, 2011
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading account assets	$ 544,938	$ 561,834
Investment securities	5,534,054	6,228,560
Real estate loans held for sale	442,664	371,437
Other assets	185,496	156,853
Total assets	6,707,152	7,318,684
Trading account liabilities	430,101	434,559
Other liabilities	14,355	6,126
Total liabilities	444,456	440,685
U.S. Treasury and federal agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities	56,599	70,723
Obligations of states and political subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities	34,568	40,269
Government issued or guaranteed [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities	4,058,500	4,521,233
Privately issued residential [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities	1,068,392	1,136,256
Privately issued commercial [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities	12,127	15,029
Collateralized Debt Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities	55,098	52,500
Other Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities	128,929	176,845
Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities	119,841	215,705
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading account assets	53,472	53,165
Investment securities	108,172	205,587
Total assets	161,644	258,752
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities	108,172	205,587
Significant Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading account assets	491,466	508,669
Investment securities	4,290,265	4,819,188
Real estate loans held for sale	442,664	371,437
Other assets	151,385	148,862
Total assets	5,375,780	5,848,156
Trading account liabilities	430,101	434,559
Other liabilities	14,295	5,058
Total liabilities	444,396	439,617
Significant Observable Inputs (Level 2) [Member] \| U.S. Treasury and federal agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities	56,599	70,723
Significant Observable Inputs (Level 2) [Member] \| Obligations of states and political subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities	34,568	40,269
Significant Observable Inputs (Level 2) [Member] \| Government issued or guaranteed [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities	4,058,500	4,521,233
Significant Observable Inputs (Level 2) [Member] \| Other Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities	128,929	176,845
Significant Observable Inputs (Level 2) [Member] \| Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities	11,669	10,118
Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities	1,135,617	1,203,785
Other assets	34,111	7,991
Total assets	1,169,728	1,211,776
Other liabilities	60	1,068
Total liabilities	60	1,068
Significant Unobservable Inputs (Level 3) [Member] \| Privately issued residential [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities	1,068,392	1,136,256
Significant Unobservable Inputs (Level 3) [Member] \| Privately issued commercial [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities	12,127	15,029
Significant Unobservable Inputs (Level 3) [Member] \| Collateralized Debt Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities	$ 55,098	$ 52,500

Fair value measurements (Details 1) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance of other assets and other liabilities	$ 20,435	$ 16,147	$ 6,923	$ 2,244
Total gains (losses) realized/ unrealized:
Included In Earnings of other assets and other liabilities	45,486	22,800	(72,517)	43,244
Transfer in and/or out of Level 3 of other assets and other liabilities	(31,870)	(25,776)	(45,389)	(32,317)
Ending Balance of other assets and other liabilities	34,051	13,171	34,051	13,171
Changes in unrealized gains (losses) included in earnings related to other assets and other liabilities still held at end of period	28,904	10,252	33,647	13,139
Privately issued residential [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	1,110,695	1,391,878	1,136,256	1,435,561
Total gains (losses) realized/ unrealized:
Included in earnings	(14,627)	(24,530)	(22,304)	(32,071)
Included in other comprehensive income	22,613	38,471	47,683	99,556
Settlements	(50,289)	(99,617)	(93,243)	(196,844)
Transfer in and/or out of Level 3
Ending Balance	1,068,392	1,306,202	1,068,392	1,306,202
Changes in unrealized gains (losses) included in earnings related to assets still held at end of period	(14,627)	(24,530)	(22,304)	(32,071)
Privately issued commercial [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	13,435	20,467	15,029	22,407
Total gains (losses) realized/ unrealized:
Included in other comprehensive income	763	(1,400)	1,111	(1,482)
Settlements	(2,071)	(1,834)	(4,013)	(3,692)
Transfer in and/or out of Level 3
Ending Balance	12,127	17,233	12,127	17,233
Collateralized Debt Obligations [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	58,184	114,265	52,500	110,756
Total gains (losses) realized/ unrealized:
Included in other comprehensive income	(2,712)	3,372	3,711	7,206
Purchases		50,790		50,790
Sales		(105,643)		(105,643)
Settlements	(374)	(1,183)	(1,113)	(1,508)
Transfer in and/or out of Level 3
Ending Balance	$ 55,098	$ 61,601	$ 55,098	$ 61,601

Fair value measurements (Details 2) - Fair Value, Measurements, Recurring [Member] $ in Thousands	6 Months Ended
	Jun. 30, 2012 USD ($)
Quantitative information related to significant unobservable inputs
Investments	$ 1,169,668
Privately issued residential [Member]
Quantitative information related to significant unobservable inputs
Investments	$ 1,080,519
Valuation technique	Discounted cash flow
Unobservable inputs/ assumptions	Probability of default Loss severity
Probability of default weighted average	18.00%
Loss severity weighted average	49.00%
Privately issued residential [Member] \| Maximum [Member]
Quantitative information related to significant unobservable inputs
Probability of default Loss	49.00%
Loss severity	75.00%
Privately issued residential [Member] \| Minimum [Member]
Quantitative information related to significant unobservable inputs
Probability of default Loss	1.00%
Loss severity	32.00%
Collateralized Debt Obligations [Member]
Quantitative information related to significant unobservable inputs
Investments	$ 55,098
Valuation technique	Discounted cash flow
Unobservable inputs/ assumptions	Probability of default
Probability of default weighted average	14.00%
Collateralized Debt Obligations [Member] \| Maximum [Member]
Quantitative information related to significant unobservable inputs
Probability of default Loss	65.00%
Collateralized Debt Obligations [Member] \| Minimum [Member]
Quantitative information related to significant unobservable inputs
Probability of default Loss	3.00%
Loss severity	100.00%
Commitments to originate real estate loans [Member]
Quantitative information related to significant unobservable inputs
Investments	$ 34,051
Valuation technique	Discounted cash flow
Unobservable inputs/ assumptions	Commitment expirations
Commitment expirations weighted average	18.00%
Commitments to originate real estate loans [Member] \| Maximum [Member]
Quantitative information related to significant unobservable inputs
Commitment expirations	69.00%
Commitments to originate real estate loans [Member] \| Minimum [Member]
Quantitative information related to significant unobservable inputs
Commitment expirations	0.00%
Privately issued commercial [Member]
Quantitative information related to significant unobservable inputs
Investments	$ 12,127

Fair Value Measurements (Details 3) - USD ($) $ in Thousands	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2011	Dec. 31, 2010
Financial assets:
Cash and cash equivalents	$ 1,422,831	$ 1,452,397	$ 1,332,915	$ 933,755
Interest-bearing deposits at banks	1,069,717	154,960
Trading account assets	544,938	561,834
Investment securities	7,057,300	7,673,154
Loans and leases:
Allowance for credit losses	(917,028)	(908,290)
Loans and leases, net	61,934,244	59,187,715
Financial liabilities:
Noninterest-bearing Deposit Liabilities, Domestic	(22,854,794)	(20,017,883)
Time deposits	(5,330,239)	(6,107,530)
Deposits, Foreign	(366,164)	(355,927)
Long-term borrowings	(5,687,868)	(6,686,226)
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Financial assets:
Cash and cash equivalents	1,343,415
Trading account assets	53,472
Investment securities	108,172
Loans and leases:
Allowance for credit losses
Significant Observable Inputs (Level 2) [Member]
Financial assets:
Cash and cash equivalents	79,416
Interest-bearing deposits at banks	1,069,717
Trading account assets	491,466
Investment securities	5,598,494
Loans and leases:
Commercial real estate loans	109,645
Residential real estate loans	6,617,925
Allowance for credit losses
Loans and leases, net	6,727,570
Accrued interest receivable	220,510
Financial liabilities:
Noninterest-bearing Deposit Liabilities, Domestic	(22,854,794)
Savings Deposits And Now Accounts	(33,997,610)
Time deposits	(5,360,561)
Deposits, Foreign	(366,164)
Federal Funds Purchased and Short Term Borrowings	(975,575)
Long-term borrowings	(5,784,700)
Interest Payable	(67,523)
Trading Liabilities	(430,101)
Other financial instruments:
Gain loss on commitments to sell real estate loans	(12,857)
Interest rate swap agreements used for interest rate risk management	149,947
Significant Unobservable Inputs (Level 3) [Member]
Financial assets:
Investment securities	1,294,005
Loans and leases:
Commercial loans and leases	16,146,408
Commercial real estate loans	24,577,798
Residential real estate loans	3,225,496
Consumer loans	11,605,448
Allowance for credit losses
Loans and leases, net	55,555,150
Other financial instruments:
Commitments to originate real estate loans for sale	34,051
Other credit related commitments	(127,616)
Carrying Amount [Member]
Financial assets:
Cash and cash equivalents	1,422,831	1,452,397
Interest-bearing deposits at banks	1,069,717	154,960
Trading account assets	544,938	561,834
Investment securities	7,057,300	7,673,154
Loans and leases:
Commercial loans and leases	16,395,587	15,734,436
Commercial real estate loans	24,898,707	24,411,114
Residential real estate loans	9,811,525	7,923,165
Consumer loans	11,745,453	12,027,290
Allowance for credit losses	(917,028)	(908,290)
Loans and leases, net	61,934,244	59,187,715
Accrued interest receivable	220,510	222,618
Financial liabilities:
Noninterest-bearing Deposit Liabilities, Domestic	(22,854,794)	(20,017,883)
Savings Deposits And Now Accounts	(33,997,610)	(32,913,309)
Time deposits	(5,330,239)	(6,107,530)
Deposits, Foreign	(366,164)	(355,927)
Federal Funds Purchased and Short Term Borrowings	(975,575)	(782,082)
Long-term borrowings	(5,687,868)	(6,686,226)
Interest Payable	(67,523)	(67,900)
Trading Liabilities	(430,101)	(434,559)
Other financial instruments:
Commitments to originate real estate loans for sale	34,051	6,923
Gain loss on commitments to sell real estate loans	(12,857)	(3,498)
Other credit related commitments	(127,616)	(109,828)
Interest rate swap agreements used for interest rate risk management	149,947	147,302
Estimated fair value [Member]
Financial assets:
Cash and cash equivalents	1,422,831	1,452,397
Interest-bearing deposits at banks	1,069,717	154,960
Trading account assets	544,938	561,834
Investment securities	7,000,671	7,608,008
Loans and leases:
Commercial loans and leases	16,146,408	15,507,342
Commercial real estate loans	24,687,443	24,024,585
Residential real estate loans	9,843,421	7,782,935
Consumer loans	11,605,448	11,869,813
Allowance for credit losses
Loans and leases, net	62,282,720	59,184,675
Accrued interest receivable	220,510	222,618
Financial liabilities:
Noninterest-bearing Deposit Liabilities, Domestic	(22,854,794)	(20,017,883)
Savings Deposits And Now Accounts	(33,997,610)	(32,913,309)
Time deposits	(5,360,561)	(6,133,806)
Deposits, Foreign	(366,164)	(355,927)
Federal Funds Purchased and Short Term Borrowings	(975,575)	(782,082)
Long-term borrowings	(5,784,700)	(6,720,174)
Interest Payable	(67,523)	(67,900)
Trading Liabilities	(430,101)	(434,559)
Other financial instruments:
Commitments to originate real estate loans for sale	34,051	6,923
Gain loss on commitments to sell real estate loans	(12,857)	(3,498)
Other credit related commitments	(127,616)	(109,828)
Interest rate swap agreements used for interest rate risk management	$ 149,947	$ 147,302

Fair value measurements (Details Textual) $ in Millions	3 Months Ended		6 Months Ended
Fair value measurements (Details Textual) $ in Millions	Jun. 30, 2012 USD ($) ValuationSources	Jun. 30, 2011 USD ($)	Jun. 30, 2012 USD ($) ValuationSources	Jun. 30, 2011 USD ($)	Dec. 31, 2011 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans measured at fair value on nonrecurring basis	$ 344.0	$ 478.0	$ 344.0	$ 478.0
Fair value measurements (Textual) [Abstract]
Number of independent pricing sources used to value privately issued residential mortgage backed securities valued with internal modeling \| ValuationSources	2		2
Privately issued residential mortgage backed securities at cost	$ 1,200.0		$ 1,200.0		$ 1,300.0
Weighted-average reliance on internal model pricing, in percentage			33.00%
Average weighting placed on the values provided by the independent sources, in percentage			67.00%
Privately issued residential mortgage - backed securities with internal modeling, at cost	1,100.0		$ 1,100.0
Fair value of privately issued residential mortgage-backed securities valued with internal modeling	1,200.0		$ 1,200.0
Weighted-average market yield			7.30%
Debt instrument weighted average basis spread on variable rate			8.00%
Securities issued by financial institutions and other entities backed by trust preferred securities at cost	44.0		$ 44.0		44.0
Fair value of securities issued by financial institutions and other entities backed by trust preferred securities	55.0		55.0		$ 53.0
Other-than-temporary impairment losses	1.0	2.0	5.0	11.0
Change in fair value of nonrecurring fair value measured loans for charge-offs and impairment reserves	21.0	61.0	34.0	91.0
Change in fair value of nonrecurring fair value measured foreclosed assets	7.0	11.0	10.0	12.0
Assets taken in foreclosure of defaulted loans measured at fair value on a nonrecurring basis	$ 47.0	31.0	$ 47.0	31.0
Minimum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount Margin	5.00%		5.00%
Maximum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount Margin	10.00%		10.00%
Significant Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans measured at fair value on nonrecurring basis	$ 234.0	324.0	$ 234.0	324.0
Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans measured at fair value on nonrecurring basis	$ 110.0	$ 154.0	$ 110.0	$ 154.0

Commitments and contingencies (Details) - USD ($) $ in Thousands	Jun. 30, 2012	Dec. 31, 2011
Commitments to extend credit
Home equity lines of credit	$ 6,369,114	$ 6,393,332
Commercial real estate loans to be sold	134,471	177,982
Other commercial real estate and construction	3,138,855	2,818,071
Residential real estate loans to be sold	771,278	182,474
Other residential real estate	438,197	129,466
Commercial and other	10,004,023	10,442,754
Standby letters of credit	3,811,819	3,930,271
Commercial letters of credit	56,725	44,981
Financial guarantees and indemnification contracts	1,895,755	1,903,254
Commitments to sell real estate loans	$ 1,068,940	$ 635,899

Commitments and contingencies (Details Textual) - USD ($) $ in Millions	Jun. 30, 2012	Dec. 31, 2011
Commitments and contingencies (Textual) [Abstract]
Maximum credit risk for recourse associated with loans sold under Federal National Mortgage Association Delegated Underwriting and Servicing program	$ 1,800	$ 1,800
Outstanding loan principal balances reinsured	71
Assets of subsidiaries providing reinsurance to satisfy claims	42
Range of reasonably possible losses, minimum	0
Range of reasonably possible losses, maximum	40
2011 - 2013 [Member]
Significant Commitments [Line Items]
Naming rights of football stadium per year	5
2014 - 2017 [Member]
Significant Commitments [Line Items]
Naming rights of football stadium per year	$ 6

Segment information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
Segment information (Details) - USD ($) $ in Thousands	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Information about the Company's segments
Total Revenue	$ 1,039,633	$ 1,087,858	$ 2,036,745	$ 1,971,082
Net income (loss)	233,380	322,358	439,843	528,631
Business Banking [Member]
Information about the Company's segments
Total Revenue	109,318	104,012	221,294	203,789
Inter-segment revenues	1,099	971	2,191	1,933
Net income (loss)	37,085	26,584	72,418	52,884
Commercial Banking [Member]
Information about the Company's segments
Total Revenue	248,754	228,564	486,216	442,176
Inter-segment revenues	1,731	1,190	3,271	2,356
Net income (loss)	99,623	95,111	202,719	183,442
Commercial Real Estate [Member]
Information about the Company's segments
Total Revenue	168,083	134,066	321,627	259,372
Inter-segment revenues	396	448	829	804
Net income (loss)	80,498	65,058	149,129	114,068
Discretionary Portfolio [Member]
Information about the Company's segments
Total Revenue	(11,807)	112,383	(12,967)	154,866
Inter-segment revenues	(20,616)	(4,419)	(35,397)	(12,206)
Net income (loss)	(14,757)	58,362	(22,998)	74,489
Residential Mortgage Banking [Member]
Information about the Company's segments
Total Revenue	109,995	58,305	203,037	116,153
Inter-segment revenues	37,455	8,699	71,896	19,006
Net income (loss)	25,994	5,966	49,511	10,751
Retail Banking [Member]
Information about the Company's segments
Total Revenue	313,994	311,484	620,842	606,532
Inter-segment revenues	3,198	2,967	6,090	5,954
Net income (loss)	58,191	54,645	106,848	107,371
All Other [Member]
Information about the Company's segments
Total Revenue	101,296	139,044	196,696	188,194
Inter-segment revenues	(23,263)	(9,856)	(48,880)	(17,847)
Net income (loss)	$ (53,254)	$ 16,632	$ (117,784)	$ (14,374)

Segment information (Details 1) - USD ($) $ in Millions	6 Months Ended		12 Months Ended
Segment information (Details 1) - USD ($) $ in Millions	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Summary of segment information
Segment Reporting Information Average Asset	$ 79,056	$ 70,262	$ 73,977
Business Banking [Member]
Summary of segment information
Segment Reporting Information Average Asset	4,932	4,861	5,192
Commercial Banking [Member]
Summary of segment information
Segment Reporting Information Average Asset	19,455	16,856	17,650
Commercial Real Estate [Member]
Summary of segment information
Segment Reporting Information Average Asset	16,316	14,227	15,025
Discretionary Portfolio [Member]
Summary of segment information
Segment Reporting Information Average Asset	16,136	14,012	14,170
Residential Mortgage Banking [Member]
Summary of segment information
Segment Reporting Information Average Asset	2,200	1,940	1,958
Retail Banking [Member]
Summary of segment information
Segment Reporting Information Average Asset	11,791	11,776	11,940
All Other [Member]
Summary of segment information
Segment Reporting Information Average Asset	$ 8,226	$ 6,590	$ 8,042

Segment information (Details Textual) - USD ($)	3 Months Ended		6 Months Ended
Segment information (Details Textual) - USD ($)	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Segment information (Textual) [Abstract]
Taxable equivalent adjustment	$ 6,645,000	$ 6,468,000	$ 13,350,000	$ 12,795,000

Relationship with Bayview Lending Group LLC and Bayview Financial Holdings, L.P. (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Relationship with Bayview Lending Group LLC and Bayview Financial Holdings, L.P. (Textual) [Abstract]
Minority interest in Bayview Lending Group LLC			20.00%
Carrying value of minority interest investment in Bayview Lending Group LLC	$ 104		$ 104
Outstanding principal balances of commercial mortgage loans from BLG and Bayview Financial	4,200		4,200		$ 4,400
Amounts recorded as capitalized servicing assets for commercial mortgage loans	12		12		16
Servicing rights purchased from Bayview Financial related to residential mortgage loans	3		3		5
Outstanding principal balances of residential mortgage loans from Bayview Financial	2,900		2,900		3,100
Revenues from servicing residential and small balance commercial mortgage loans purchased from BLG and Bayview Financial	11	$ 10	23	$ 21
Collateralized mortgage obligations in available-for-sale investment securities portfolio securitized by Bayview Financial	12		12		15
Investment securities in held-to-maturity portfolio securitized by Bayview Financial	255		255		269
Residential mortgage loans	$ 12,300		$ 12,300		$ 13,100

Label	Element	Value
Mortgage Backed Securities Issued by Private Enterprise [Member]
Held-to-maturity Securities, Unrecognized Holding Loss	us-gaap_HeldToMaturitySecuritiesUnrecognizedHoldingLoss	$ 99,140,000
Held-to-maturity Securities, Unrecognized Holding Loss	us-gaap_HeldToMaturitySecuritiesUnrecognizedHoldingLoss	97,220,000
Held-to-maturity Securities, Fair Value	us-gaap_HeldToMaturitySecuritiesFairValue	169,502,000
Held-to-maturity Securities, Fair Value	us-gaap_HeldToMaturitySecuritiesFairValue	158,388,000
Held To Maturity Securities	us-gaap_HeldToMaturitySecurities	268,642,000
Held To Maturity Securities	us-gaap_HeldToMaturitySecurities	255,291,000
Held-to-maturity Securities, Unrecognized Holding Gain	us-gaap_HeldtomaturitySecuritiesUnrecognizedHoldingGain	317,000
Government issued or guaranteed [Member]
Held-to-maturity Securities, Fair Value	us-gaap_HeldToMaturitySecuritiesFairValue	633,414,000
Held-to-maturity Securities, Fair Value	us-gaap_HeldToMaturitySecuritiesFairValue	765,841,000
Held To Maturity Securities	us-gaap_HeldToMaturitySecurities	608,533,000
Held To Maturity Securities	us-gaap_HeldToMaturitySecurities	733,912,000
Held-to-maturity Securities, Unrecognized Holding Gain	us-gaap_HeldtomaturitySecuritiesUnrecognizedHoldingGain	24,881,000
Held-to-maturity Securities, Unrecognized Holding Gain	us-gaap_HeldtomaturitySecuritiesUnrecognizedHoldingGain	$ 31,929,000

- Definition

For an unclassified balance sheet, this item represents investments in debt securities which are categorized as held-to-maturity. The held-to-maturity category is for those securities that the entity has the positive intent and ability to hold until maturity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 25
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=7534914&loc=d3e22054-111558

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.6)
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.1)
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 19
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 7
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 8
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 9
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 10
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 17
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 43
-Section A
-Paragraph 5
-Chapter 3
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 43
-Section A
-Paragraph 4
-Chapter 3
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 12: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 11
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details