Preferred stock, $1.00 par, 1,000,000 shares authorized, 778,000 shares issued and oustanding (liquidation preference $1,000 per share) Preferred Stock, Value, Issued Preferred Stock, Value, Issued, Ending Balance Preferred Stock, Value, Issued, Beginning Balance Preferred Stock, Value, Issued, Total Common Stock, Value, Issued Common Stock, Value, Issued, Ending Balance Common Stock, Value, Issued, Beginning Balance Common stock, $.50 par, 250,000,000 shares authorized, 120,396,611 shares issued Common stock, $.50 par, 250,000,000 shares authorized, 120,396,611 shares issued Treasury Stock, Value Treasury stock - common, at cost - 1,643,972 shares at March 31, 2010; 2,173,916 shares at December 31, 2009 Treasury Stock, Value, Ending Balance Treasury Stock, Value, Beginning Balance Treasury stock - common, at cost - 2,458,153 shares at June?30, 2009; 10,031,302 shares at December?31, 2008 Treasury stock - common, at cost - 2,173,916 shares at December 31, 2009; 10,031,302 shares at December 31, 2008 Retained earnings Retained Earnings (Accumulated Deficit), Total Retained Earnings (Accumulated Deficit), Beginning Balance Retained Earnings (Accumulated Deficit), Ending Balance Accumulated other comprehensive income (loss), net Accumulated Other Comprehensive Income (Loss), Net of Tax, Total Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance Total stockholders' equity Total stockholders' equity Stockholders' Equity Attributable to Parent, Beginning Balance Stockholders' Equity Attributable to Parent, Ending Balance Additional paid-in capital Additional Paid in Capital, Total Additional Paid in Capital, Beginning Balance Additional Paid in Capital, Ending Balance Total liabilities and stockholders' equity Total liabilities and stockholders' equity Stockholders' equity Liabilities Total liabilities Total liabilities Long-term borrowings Long-term borrowings Other short-term borrowings Federal funds purchased and agreements to repurchase securities Federal Funds Purchased and Securities Sold under Agreements to Repurchase, Total Total deposits Total deposits Deposits at foreign office Deposits at foreign office Assets Loans and leases, net Loans and leases, net Other Investment securities Other (fair value: $0 in 2010; $508,624 in 2009) Other (fair value: $497,575 at March 31, 2010; $508,624 at Decemeber 31, 2009) Other (fair value: $0 at March 31, 2010; $508,624 at Decemeber 31, 2009) Line item includes holdings of Federal Home Loan Bank and Federal Reserve Bank stock (at amortized cost). Investment securities [Abstract] Investment securities (includes pledged securities that can be sold or repledged of $1,787,179 at March 31,2010; $1,797,701 at December 31,2009) Cash flows from investing activities Cash flows from financing activities Other investments, net Other investments net The net cash inflow (outflow) related to other investments that may include joint ventures and equity investees. Cash flows from operating activities Net cash provided by operating activities Adjustments to reconcile net income to net cash provided by operating activities Net change in loans originated for sale Net change in other accrued income and expense Increase Decrease in other accrued income and expense Increase Decrease in other accrued income and expense. Preferred stock, par value Preferred stock, shares authorized Preferred stock, shares issued Preferred stock, shares outstanding Commmon stock, par value Commmon stock, shares authorized Commmon stock, shares issued Treasury stock, shares Asset write-downs Provision for deferred income taxes Amortization of core deposit and other intangible assets Amortization of capitalized servicing rights Depreciation and amortization of premises and equipment Net income Proceeds From Sale Of Other Investments Proceeds From Maturities Prepayments and calls of Held To Maturity Securities Available for sale Available for sale Available for sale Payments To Acquire Held to maturity Securities Payments To Acquire Other Investments Net decrease in loans and leases Payments for (Proceeds from) Loans and Leases Net (increase) decrease in loans and leases Net decrease in loans and leases Additions to capitalized servicing rights Capital expenditures, net Payments For Proceeds From Other Investing Activities Other, net Other, net Supplemental disclosure of cash flow information Income Taxes Paid, Net Income taxes paid (refunded) during the period Income taxes paid (refunded) during the year Interest received during the period Interest received during the period Interest received during the period Income Tax Expense (Benefit) Income taxes Other expense Total other expense Other costs of operations FDIC assessments FDIC assessments Printing, postage and supplies Salaries and employee benefits Other income Total other income Other revenues from operations Gain (Loss) on Sale of Securities, Net Gain on bank investment securities Gain on bank investment securities Trading account and foreign exchange gains Brokerage services income Fees And Commissions Fiduciary And Trust Activities Service charges on deposit accounts Net interest income after provision for credit losses Net interest income Interest expense Total interest expense Long-term borrowings Short-term borrowings Deposits at foreign office Time deposits Interest Expense Savings Deposits Savings deposits Interest Expense Negotiable Order of Withdrawal NOW Deposits NOW accounts Interest income Total interest income Exempt from federal taxes Fully taxable Trading account Interest Income Securities Purchased Under Agreements To Resell Agreements to resell securities Federal funds sold Deposits at banks Loans and leases, including fees Earnings per common share [Abstract] Diluted Basic Net increase (decrease) in deposits Proceeds from (Repayments of) Short-term Debt Net decrease in short-term borrowings Net decrease in short-term borrowings Payments on long-term borrowings Dividends paid - common Dividends paid - common Proceeds From Payments For Other Financing Activities Net Cash Provided by (Used in) Financing Activities Net cash used by financing activities Cash and Cash Equivalents, Period Increase (Decrease) Net decrease in cash and cash equivalents Net decrease in cash and cash equivalents Supplemental schedule of noncash investing and financing activities Total assets Allowance for credit losses Cash and due from banks Interest-bearing deposits at banks Loans and leases Premises and equipment Available-for-sale Securities Available for sale (cost: $6,835,553 at September 30, 2009; $7,656,635 at December 31, 2008) Available for sale (cost: $6,261,058 at March 31, 2010; $6,997,009 at December 31,2009) Held to maturity (fair value: $431,036 at September 30, 2009; $394,752 at December 31, 2008) Held to maturity (fair value: $431,036 at September 30, 2009; $394,752 at December 31, 2008) Held to maturity (fair value: $1,373,672 at March 31, 2010; $416,483 at December 31, 2009) Deposits Negotiable Order Of Withdrawal NOW NOW accounts Deposits Savings deposits Savings deposits Unearned discount Trading account Income Loss From Equity Method Investments Net O T T I losses recognized in earnings Net OTTI losses recognized in earnings Net OTTI losses recognized in earnings. Portion of OTTI losses recognized in other comprehensive income (before taxes) Portion of O T T I losses recognized in other comprehensive income before taxes Portion of OTTI losses recognized in other comprehensive income (before taxes). Total other than temporary impairment O T T I losses Total other-than-temporary impairment ("OTTI") losses Total other-than-temporary impairment ("OTTI") losses. Comprehensive income: Other Comprehensive Income, Defined Benefit Plans Adjustment, Net of Tax Defined benefit plans liability adjustment Defined benefit plans liability adjustment Common stock cash dividends - $0.70 per share Common stock cash dividends - $0.70 per share Common stock cash dividends - $1.40 per share Preferred stock cash dividends Preferred stock Common stock Additional paid-in capital Retained earnings Accumulated other comprehensive income (loss), net Treasury stock Begining Balance Other comprehensive income, net of tax and reclassification adjustments: Other Comprehensive Income (Loss), Net of Tax [Abstract] Unrealized losses on investment securities Unrealized gains on investment securities Comprehensive Income, Net of Tax, Attributable to Parent Other Comprehensive Income Other Comprehensive Income Ending Balance Provision For Loan Lease And Other Losses Provision for credit losses Provision for credit losses Provision for credit losses Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents at end of period Cash and cash equivalents at beginning of period Cash and cash equivalents at beginning of period Common stock per share dividend amount Common Stock, Dividends, Per Share, Declared Significant accounting policies [Abstract] Significant accounting policies [Abstract] Significant accounting policies. Borrowings [Abstract] Borrowings [Abstract] Borrowings. Commitments and contingencies [Abstract] Commitments and contingencies [Abstract] Commitments and contingencies. Segment information [Abstract] Segment information [Abstract] Segment information. Significant accounting policies Significant Accounting Policies [Text Block] Borrowings Debt Disclosure [Text Block] Pension plans and other postretirement benefits Pension and Other Postretirement Benefits Disclosure [Text Block] Earnings per common share Earnings Per Share [Text Block] Comprehensive income Comprehensive Income Note [Text Block] Fair value measurements Fair Value Disclosures [Text Block] Commitments and contingencies Commitments and Contingencies Disclosure [Text Block] Segment information Segment Reporting Disclosure [Text Block] Income before taxes Income before taxes Income before taxes. Gains (Losses) on Sales of Assets Net gain on sales of assets Net (gain) loss on sales of assets Net change in trading account assets and liabilities Net change in trading account assets and liabilities Net change in trading account assets and liabilities. Real estate acquired in settlement of loans Real estate acquired in settlement of loans Real estate acquired in settlement of loans. Deferred compensation plans, net, including dividend equivalents Deferred compensation plans net including dividend equivalents Deferred compensation plans, net, including dividend equivalents. Amortization of preferred stock discount Amortization of preferred stock discount Amortization of preferred stock discount. Common stock issuable Common stock issuable Common Stock Issuable Common stock issuable Common stock issuable. Acquisitions [Abstract] Acquisitions [Abstract] Acquisitions. Acquisitions Business Combination Disclosure [Text Block] Relationship with Bayview Lending Group LLC and Bayview Financial Holdings, L.P. [Abstract] Relationship with Bayview Lending Group LLC and Bayview Financial Holdings, L.P. [Abstract] Relationship with Bayview Lending Group LLC and Bayview Financial Holdings, L.P. [Abstract] Relationship With Other Entities. Relationship with Bayview Lending Group LLC and Bayview Financial Holdings, L.P. Relationship With Other Entities Text Block Relationship With Other Entities. Investment securities Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Pledged securities that can be sold or repledged Securities Held as Collateral, at Fair Value Investment securities, held to maturity, fair value Held-to-maturity Securities, Fair Value Investment securities, available for sale, cost Available-for-sale Securities, Amortized Cost Common stock, issuable shares Common stock issuable shares Number of shares of common stock issuable in connection with deferred Compensation plans. Cash and due from banks Cash and Due from Banks Federal funds sold Federal Funds Sold Time deposits Time Deposits, Total Time Deposits Net Cash Provided by (Used in) Investing Activities Net cash provided (used) by investing activities Net cash provided (used) by investing activities Total investment securities Total investment securities Total investment securities. Core deposit and other intangible assets Intangible Assets, Net (Excluding Goodwill), Total Intangible Assets, Net (Excluding Goodwill) Accrued interest and other assets Accrued interest and other assets Other Assets Noninterest-bearing deposits Noninterest-bearing Deposit Liabilities, Domestic, Total Noninterest-bearing Deposit Liabilities, Domestic Accrued interest and other liabilities Other Liabilities, Total Other Liabilities Net change in accrued interest receivable, payable Net change in accrued interest receivable, payable Net change in accrued interest receivable, payable. Interest Paid Interest paid during the period Trading account Trading Securities Loans and leases Loans and Leases Receivable, Gross, Carrying Amount Allowance for credit losses Beginning balance Ending balance Loans and Leases Receivable, Net Reported Amount Premises and equipment Property, Plant and Equipment, Net, Beginning Balance Property, Plant and Equipment, Net, Ending Balance Property, Plant and Equipment, Net Deposits, Foreign Deposits Long-term Debt Liabilities Stockholders' Equity Attributable to Parent Liabilities and Stockholders' Equity Loans and leases, including fees Interest and Fee Income, Loans and Leases Deposits at banks Interest Income, Domestic Deposits Exempt from federal taxes Time deposits Interest Expense, Time Deposits Short-term borrowings Interest Expense, Short-term Borrowings Net interest income Interest Income (Expense), Net Portion of OTTI losses recognized in other comprehensive income (before taxes) Other revenues from operations Salaries and employee benefits Labor and Related Expense Printing, postage and supplies Supplies and Postage Expense Other costs of operations Basic Earnings Per Share, Basic Diluted Earnings Per Share, Diluted Net income Net Income (Loss) Attributable to Parent Asset write-downs Asset Impairment Charges Net change in loans originated for sale Increase (Decrease) in Loans Held-for-sale Net change in trading account assets and liabilities Available for sale Proceeds from Sale of Available-for-sale Securities Available for sale Payments to Acquire Available-for-sale Securities Capital expenditures, net Payments for (Proceeds from) Productive Assets Net increase (decrease) in deposits Increase (Decrease) in Deposits Payments on long-term borrowings Repayments of Long-term Debt Other, net Allowance for credit losses Loans and Leases Receivable, Deferred Income, Total Unearned discount Available for sale Held to maturity Other Additions to capitalized servicing rights Capital expenditures, net Payments on long-term borrowings Ending balance Preferred stock, liquidation preference per share Preferred Stock, Liquidation Preference Per Share Treasury stock - common, shares Treasury Stock, Shares, Beginning Balance Treasury Stock, Shares, Ending Balance Other Available for sale Held to maturity Directors' stock plan Stock Granted During Period, Value, Share-based Compensation Net Income (Loss) Available to Common Stockholders, Basic Net income available to common shareholders Net income available to common equity Repayment of management stock ownership program receivable Repayment of management stock ownership program receivable Repayment of management stock ownership program receivable. Stockholders' equity Stockholders' Equity Note Disclosure [Text Block] Compensation expense Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition, Value Exercises of stock option and purchase plans Exercises of stock options Exercises of stock option and purchase plans. Stockholders' equity [Abstract] Investment securities, other fair value Other Securities Fair Value Parenthetical disclosure of holdings of Federal Home Loan Bank and Federal Reserve Bank Stock (at fair value). Fully taxable Mortgage banking revenues Mortgage Banking Revenues The noninterest income derived from mortgage banking activities (fees and commissions), including fees earned from servicing third-party assets. Equipment and net occupancy Equipment And Net Occupancy Amount of equipment and net occupancy expense that may include items, such as furniture expenses, depreciation, repairs, rentals, service contract costs, rent expense, utilities and property taxes. Entity Registrant Name Entity Central Index Key Document Type Document Period End Date Amendment Flag Statement [Table] Statement [Line Items] Assets [Abstract] Goodwill Assets Liabilities [Abstract] Federal Funds Purchased and Securities Sold under Agreements to Repurchase Other Short-term Borrowings Stockholders' Equity Attributable to Parent [Abstract] Additional Paid in Capital Retained Earnings (Accumulated Deficit) Accumulated Other Comprehensive Income (Loss), Net of Tax Interest and Dividend Income, Operating Interest Expense, Long-term Debt Interest Expense Interest Income (Expense), after Provision for Loan Loss Noninterest Income Noninterest Expense Consolidated Statement of Cash Flows [Abstract] Net Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Net Cash Provided by (Used in) Operating Activities Net Cash Provided by (Used in) Investing Activities [Abstract] Net Cash Provided by (Used in) Financing Activities [Abstract] Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Statement, Equity Components [Axis] Equity Component [Domain] Parent [Member] Interest income Interest expense Other income Other expense Net income per common share Consolidated Balance Sheet [Abstract] Consolidated Statement of Income [Abstract]