Derivative Instruments, Gain (Loss) [Table]
Derivative Instruments Gain Loss By Hedging Relationship By Income Statement Location By Derivative Instrument Risk [Table]
Entity Address, City or Town
Entity Address, City or Town
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
Schedule of Income Tax Expense Benefit Reconciliation
Income (Loss) from Subsidiaries, Net of Tax
Net income of subsidiaries
Income (Loss) from Subsidiaries, Net of Tax, Total
Derivative Asset, Subject to Master Netting Arrangement, before Offset
Asset Derivatives, Fair Value
Derivative Asset, Fair Value, Gross Asset, Total
Tax Cuts and Jobs Act of 2017 reclassification from AOCI to retained earnings tax.
Tax Cuts And Jobs Act Of2017 Reclassification From A O C I To Retained Earnings Tax
Reclassification of income tax effects to retained earnings, tax
Net Income (Loss) Available to Common Stockholders, Basic
Basic
Net income available to common shareholders
Regulatory Capital Requirements under Banking Regulations [Text Block]
Regulatory matters
Fair Value Disclosures [Abstract]
Fair value of Assets acquired (noncash)
Fair Value of Assets Acquired
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage
Target allocations for plan assets
Earnings Per Share [Abstract]
Net income per common share
Parent Company Only Financial Information [Table]
Parent Company Only Financial Information [Table]
Parent Company Only Financial Information [Table]
Residential real estate loans Member.
Residential Real Estate Loans [Member]
Residential Real Estate Loans
Commitments to extend credit for commercial real estate loans to be sold.
Commitments To Extend Credit For Commercial Real Estate Loans To Be Sold
Commercial real estate loans to be sold
Fair Value, Inputs, Level 1 [Member]
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Employee service share based compensation cash received from employee stock ownership plan.
Employee Service Share Based Compensation Cash Received From Employee Stock Ownership Plan
Cash received from exercise of stock options
Stock Issued During Period, Value, New Issues
Issuance of preferred stock
Net Cash Provided by (Used in) Financing Activities [Abstract]
Cash flows from financing activities
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect
Net increase (decrease) in cash, cash equivalents and restricted cash
Other Short-Term Borrowings
This item represents other changes in the accretable yield due to changes in expected cash flows including changes in interest rates and prepayment assumptions.
Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Interest Other Increase Decrease
Other
Guaranteed deposit fund.
Guaranteed Deposit Fund [Member]
Guaranteed Deposit Fund [Member]
Finite-Lived Intangible Assets, Net, Amortization Expense, Rolling Maturity [Abstract]
Increase (Decrease) in Other Operating Assets and Liabilities, Net
Net change in other accrued income and expense
Increase (Decrease) in Other Operating Assets and Liabilities, Net, Total
Common stock issued (50,325,004 shares)
Business Combination Consideration Transferred Common Stock Issued
Business combination consideration transferred common stock issued.
Accrued Investment Income Receivable
Accrued interest receivable
Accrued Investment Income Receivable, Total
Schedule of minimum capital required to be well capitalized under banking regulations.
Schedule Of Minimum Capital Required To Be Well Capitalized Under Banking Regulations Table [Text Block]
Summary of Required Minimum and Well Capitalized Capital Ratios
Investment grade bonds.
Investment Grade Bonds [Member]
Investment Grade Bonds [Member]
Fair Value Measurement [Domain]
Fair Value Measurement
Long-Term Line of Credit
Outstanding borrowings
Long-term Line of Credit, Total
Weighted-Average Exercise Price, Assumed in business combination
Share Based Compensation Arrangements By Share Based Payment Award Options Assumed In Business Combination In Period Weighted Average Exercise Price
Share based compensation arrangements by share based payment award options assumed in business combination in period weighted average. Exercise Price
Proceeds from (Payments for) in Interest-Bearing Deposits in Banks
Net (increase) decrease in interest-bearing deposits at banks
Mortgage related commitments to originate real estate loans for sale.
Mortgage Related Commitments To Originate Real Estate Loans For Sale [Member]
Mortgage-Related Commitments to Originate Real Estate Loans for Sale [Member]
Amendment Flag
Amendment Flag
Net increase (decrease) in short-term borrowings
Net increase (decrease) in short term borrowings.
Net Increase Decrease In Short Term Borrowings
Real Estate Loan [Member]
Commercial Real Estate Loans [Member]
Percentage of loans in the process of foreclosure, serviced by other entities, classified as government guaranteed.
Percentage Of Loans In The Process Of Foreclosure Serviced By Other Entities Classified As Government Guaranteed
Percentage loans in the process of foreclosure, serviced by other entities, classified as government guaranteed
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax
Defined benefit plans liability adjustments
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax, Total
2026
Long-Term Debt, Maturity, Year Four
Interest and Other Income [Table Text Block]
Other Income and Other Expense
Commercial lease.
Commercial Lease [Member]
Commercial Lease [Member]
Gain (loss) on sale of subsidiary, pre-tax
Gain Loss On Sale Of Properties Pre Tax
Gain loss on sale of properties pre tax.
Share based compensation arrangement by share based payment award stock issued in period weighted average grant date fair value.
Share Based Compensation Arrangement By Share Based Payment Award Stock Issued In Period Weighted Average Grant Date Fair Value
Weighted-average grant date fair value
Short-Term Debt
Short-term borrowings
Federal funds purchased and short term borrowings
Noninterest-Bearing Deposit Liabilities, Domestic
Noninterest-bearing deposits
Noninterest-bearing deposits
Noninterest-bearing Deposit Liabilities, Domestic, Total
Extinguishment of Debt [Axis]
Extinguishment of Debt
Finite-Lived Intangible Assets, Accumulated Amortization
Accumulated Amortization
The amount of interest from acquired loans included in earnings.
Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Interest Income
Interest income
Transfers and Servicing of Financial Assets [Text Block]
Capitalized servicing assets
Commercial Loan [Member]
Commercial Mortgage Loans [Member]
Weighted-average discount rates for fair value estimations
Weighted-average Discount Rates for Fair Value Estimations
Weighted-average discount rates for fair value estimations.
Goodwill
Goodwill
Goodwill, Total
Goodwill, Beginning Balance
Goodwill, Ending Balance
Leveraged Leases, Net Investment in Leveraged Leases Disclosure, Residual Value of Leased Assets
Estimated residual value of leased assets
Operating Lease, Right-of-Use Asset
Right of use assets — operating leases
Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration]
Operating Lease Liability Statement Of Financial Position Extensible List
Summary of outstanding Loan balances related to Covid 19 modifications granted.
Summary Of Outstanding Loan Balances Related To Covid19 Modifications Granted Table [Text Block]
Summary Of Outstanding Loan Balances Related To Covid-19 Payment Deferrals Granted
Schedule of Finite-Lived Intangible Assets [Table Text Block]
Schedule of Finite-Lived Intangible Assets
Banking Regulation, Tier 1 Leverage Capital Ratio, Actual
Ratio
Loans and Leases Receivable, Gross
Loans and leases
Total loans and leases
Loans and leases
Disposal Group Name [Axis]
This item represents the fair value of securities that have been in a continuous loss position for twelve months or longer.
Investment Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value
Total of investment securities, fair value, 12 Months or More
Impaired financing receivable nonaccrual interest income.
Impaired Financing Receivable Nonaccrual Interest Income
Interest Income Recognized
Increase (decrease) in fair value of nonrecurring fair value measured loans for charge offs and impairment reserve.
Increase Decrease In Fair Value Of Nonrecurring Fair Value Measured Loans For Charge Offs And Impairment Reserves
Change in fair value of nonrecurring fair value measured loans for charge-offs and impairment reserves
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Immediate Recognition of Actuarial Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]
Deferred tax liabilities interest on loans.
Deferred Tax Liabilities Interest On Loans
Interest on loans
Schedule of Long-Term Debt Instruments [Table]
Debt Instrument [Table]
Interest and Dividend Income, Operating [Abstract]
Interest income
The notional amount of interest rate swap agreements entered into for risk management purposes that mature during the sixth year after the balance sheet date.
Derivative Notional Amount To Expire In Year Six
2027
Payments for Repurchase of Common Stock
Purchases of treasury stock
Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Period Increase (Decrease)
Total Realized/Unrealized Gains (Losses)
Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Period Increase (Decrease), Total
Accretion of net gain on terminated cash flow hedges, tax
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]
Lessee, Operating Lease, Liability, Undiscounted Excess Amount
Less: imputed interest
Earnings Per Share, Policy [Policy Text Block]
Earnings per common share
Equity Method Investments
Carrying value of minority interest investment in Bayview Lending Group LLC
Statement [Table]
Statement [Table]
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), after Reclassification Adjustment, before Tax
Total recognized in other comprehensive income, pre-tax
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), after Reclassification Adjustment, before Tax, Total
Other Comprehensive Income (Loss), Tax
Total other comprehensive income (loss), tax
Unrecognized Tax Benefits that Would Impact Effective Tax Rate
Net unrecognized tax benefits that, if recognized, would impact the effective income tax rate
Schedule of Credit Derivatives [Table]
Schedule Of Credit Derivatives [Table]
Securities Held as Collateral, at Fair Value
Pledged securities that can be sold or repledged
The tabular disclosure of changes in level 3 assets and liabilities measured at estimated fair value on recurring basis.
Changes In Level Three Assets And Liabilities Measured At Estimated Fair Value On Recurring Basis Table [Text Block]
Changes in Level 3 Assets and Liabilities Measured at Estimated Fair Value on Recurring Basis
The weighted average interest of short-term borrowings during the period.
Short Term Debt Weighted Average Interest Rate During Period
Weighted-average interest rate
Other Postretirement Benefits Plan [Member]
Other Postretirement Benefits [Member]
Schedule of Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets [Table Text Block]
Economic Assumptions Used to Determine Fair Value of Capitalized Servicing Rights and Sensitivity of Value to Changes in Assumptions
2024
Sales-Type and Direct Financing Leases, Lease Receivable, to be Received, Year Two
Operating Lease, Payments
Cash paid toward lease liabilities
Fair value of Liabilities assumed
Liabilities Assumed
Other Segments [Member]
All Other [Member]
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table]
Schedule Of Compliance With Regulatory Capital Requirements Under Banking Regulations [Table]
London Interbank Offered Rate (LIBOR) [Member]
LIBOR [Member]
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value
Held to maturity, Estimated fair value, Less than 12 months
Total amount of accumulated unrealized gain on investments in debt and equity securities before taxes.
Investment Securities Gross Unrealized Losses
Unrealized losses on individual investment securities
Other revenues from operations.
Other Revenues From Operations [Member]
Other Revenues From Operations [Member]
Preferred Stock, Shares Outstanding
Preferred stock, shares outstanding
Preferred stock, Shares Outstanding
Preferred Stock, Shares Outstanding, Beginning Balance
Preferred Stock, Shares Outstanding, Ending Balance
Business Acquisition [Axis]
Business Acquisition
Accumulated Other Comprehensive Income (Loss) [Table]
Accumulated Other Comprehensive Income Loss [Table]
Series I and series G preferred stock
Series I And Series G Preferred Stock [Member]
Series I and Series G Preferred Stock [Member]
Asset Pledged as Collateral without Right [Member]
Equipment and net occupancy
Equipment and net occupancy.
Payments of Ordinary Dividends, Common Stock
Dividends paid — common
Auditor Firm ID
Auditor Firm ID
Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, Year One
Due in one year or less
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value
Weighted-Average Grant Price, Unvested, Ending balance
Weighted-Average Grant Price, Unvested, Beginning balance
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value
Weighted-Average Grant Price, Vested
Fixed Rate Term Loans 5.75% due 2024 [Member]
Fixed Rate Term Loan Five Point Seven Five Percentage Due in Two Thousand Twenty Four [Member]
Fixed rate term loan five point seven five percentage due in two thousand twenty four.
Debt Securities, Held-to-Maturity, Fair Value
Investment securities, held to maturity, fair value
Total
Estimated fair value for held to maturity
Net Cash Provided by (Used in) Investing Activities, Continuing Operations
Net cash provided (used) by investing activities
Condensed Balance Sheet [Table Text Block]
Condensed Balance Sheet
Aggregate net gain and losses (whether realized or unrealized) of the hedged item in a fair value hedge recognized in the income statement.
Gain Loss On Hedged Item In Fair Value Hedge
Derivatives in fair value hedging relationships, Hedged item
Deferred tax liability gains on cash flow hedges.
Deferred Tax Liability Gains On Cash Flow Hedges
Gains on cash flow hedges
Gain on MTIA divestiture
Gain (Loss) on Disposition of Business
Capital conservation buffer ratio effective
Capital Conservation Buffer Ratio Effective
Capital conservation buffer ratio effective.
International Activities [Line Items]
International Activities [Line Items]
International Activities [Line Items]
Brokerage Commissions Revenue
Brokerage services income
Payments to Acquire Productive Assets
Capital expenditures
Payments to Acquire Productive Assets, Total
Residential mortgage loans secured by residential real estate in process of foreclosure.
Residential Mortgage Loans Secured By Residential Real Estate In Process Of Foreclosure
Loans secured by residential real estate that were in the process of foreclosure
Acquisition and divestitures
Business Combination Disclosure [Text Block]
Income Tax Authority [Domain]
Income Tax Authority
Unrecognized income tax benefits.
Unrecognized Income Tax Benefits [Member]
Unrecognized Income Tax Benefits [Member]
Interest Income, Securities, Operating, Tax Exempt
Exempt from federal taxes
2026
Defined Benefit Plan, Expected Future Benefit Payment, Year Four
Share-Based Payment Arrangement, Expense, Tax Benefit
Recognized income tax benefits related to stock-based compensation
Hedging Relationship [Domain]
Hedging Relationship
Product and Service [Axis]
Product and Service
Summary of loan grades applied various classes of commercial and real estate loans.
Summary Of Loan Grades Applied Various Classes Of Commercial And Real Estate Loans Table [Text Block]
Summary of Loan grades applied various classes of Commercial and Real Estate Loans
Trading Liabilities, Fair Value Disclosure
Trading account liabilities
Trading account liabilities
Amortization period
Finite-Lived Intangible Asset, Useful Life
Estimated useful lives
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Due Date, Earliest
Advances from the FHLB earliest maturity date
Reclassified [Member]
Revision of Prior Period, Reclassification, Adjustment [Member]
government-guaranteed loans.
Government Guaranteed Loans [Member]
Government-Guaranteed Loans [Member]
Share-Based Payment Arrangement, Option [Member]
Stock Option Awards [Member]
Concentration Risk Type [Axis]
Concentration Risk Type
Collateral Already Posted, Aggregate Fair Value
Amount of initial margin posted
Financing Receivable, Real Estate Acquired Through Foreclosure [Policy Text Block]
Assets taken in foreclosure of defaulted loans
Carrying amount as of the balance sheet date of income taxes previously overpaid to tax authorities by subsidiaries.
Due From Subsidiaries Income Tax Receivable
Current income tax receivable
Operating Lease, Weighted Average Remaining Lease Term
Weighted-average remaining lease term
Investments in banks and bank holding companies that are consolidated in the financial statements.
Investments In Consolidated Banking Subsidiaries
Banks
Liabilities and Equity
Total liabilities and shareholders’ equity
Reconciliation of Other Significant Reconciling Items from Segments to Consolidated [Table Text Block]
Intersegment Activity Eliminated in Arriving at Consolidated Totals was Included in "All Other" Category
Deferred Tax Liabilities, Leasing Arrangements
Right of use assets and other leasing transactions
Net income loss available to common stockholders before unvested stock based compensation awards adjustment as used in the determination of basic earnings per common share.
Net Income Loss Available To Common Stockholders Basic Before Unvested Stock Based Compensation Awards Adjustment
Net income available to common equity
Payments for Repurchase of Preferred Stock and Preference Stock
Redemption of Series A and C preferred stock
Redemption of Series A and Series C preferred stock
Loans and Leases Receivable, Related Parties, Additions
New borrowings by directors, certain officers and their associates
Employee stock purchase plan.
Employee Stock Purchase Plan [Member]
Stock Purchase Plan [Member]
Plan Name [Domain]
Plan Name
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net
Increase decrease in net interest income due to interest rate swap agreements
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net, Total
Assets for Plan Benefits, Defined Benefit Plan
Prepaid asset recognized in the consolidated balance sheet
Other modifications.
Other Modifications [Member]
Other [Member]
Schedule of Servicing Assets at Fair Value [Table]
Servicing Assets At Fair Value [Table]
Share based compensation arrangement by share based payment award option grants in period weighted average grant date fair value.
Share Based Compensation Arrangement By Share Based Payment Award Option Grants In Period Weighted Average Grant Date Fair Value
Weighted average grant date fair value of options granted
Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table]
Fair Values Derivatives Balance Sheet Location By Derivative Contract Type By Hedging Designation [Table]
Equity Method Investments And Cost Method Investments [Abstract]
Equity Method Investments And Cost Method Investments [Abstract]
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Adjusted weighted-average shares outstanding:
Loan and leases considered nonaccrual and interest income recognized on loans.
Loan And Leases Considered Nonaccrual And Interest Income Recognized On Loans Table [Text Block]
Loan and Leases Considered Nonaccrual and Interest Income Recognized on Loans
Pledged Status [Domain]
Entity Incorporation, State or Country Code
Entity Incorporation, State or Country Code
Income Statement [Abstract]
2023
Lessee, Operating Lease, Liability, Payments, Due Next Rolling 12 Months
Other Assets, Fair Value Disclosure
Other assets
Other revenues from operations.
Other Revenues From Operations [Abstract]
Other revenues from operations:
Other liabilities
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other
Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10
Due after five years through ten years
Commercial [Member]
Commercial Mortgage-Backed Securities [Member]
Operating Segments [Member]
Operating Segments [Member]
Deferred Revenue
Deferred revenue
Deferred Revenue, Total
Labor and Related Expense
Salaries and employee benefits
BSB Capital Trust III - due 2033.
Bsb Capital Trust Three Variable Rate Due Two Zero Three Three [Member]
BSB Capital Trust III - due 2033 [Member]
Derivative, Average Fixed Interest Rate
Weighted-Average Rate, Fixed
Reconciliation of unrecognized tax benefits.
Reconciliation Of Unrecognized Tax Benefits [Line Items]
Reconciliation Of Unrecognized Tax Benefits [Line Items]
Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 10
Due after ten years
Loans and Leases Receivable, Related Parties
Borrowing by directors and certain officers of M&T and its banking subsidiaries and their associates
Loans and Leases Receivable, Related Parties, Beginning Balance
Loans and Leases Receivable, Related Parties, Ending Balance
Debt Securities, Held-to-Maturity, Maturity, Allocated and Single Maturity Date, Fair Value
Total available for held to maturity (fair value)
Series F And Series G Preferred Stock
Series F And Series G Preferred Stock [Member]
Series F And Series G Preferred Stock [Member]
Long term debt two thousand eighteen.
Long Term Debt Two Thousand Eighteen [Member]
Term Loans 2018 [Member]
2024
Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Two
Investments in consolidated subsidiaries.
Investments In Consolidated Subsidiaries [Abstract]
Investments in consolidated subsidiaries
Variable rate term loans due two thousand and twenty three.
Variable Rate Term Loans Due Two Thousand And Twenty Three [Member]
Variable Rate Term Loans Due 2023 [Member]
2027
Long-Term Debt, Maturity, Year Five
Acquisition, net of cash consideration
Cash Acquired from Acquisition
Other Depreciation and Amortization
Depreciation and other amortization
Business Acquisition, Acquiree [Domain]
Business Acquisition, Acquiree
Fair Value, Recurring [Member]
Fair Value Measurements, Recurring [Member]
Interest Expense
Total interest expense
Acquired in business combination
Service Asset at Amortized Value Acquired in Business Combination
Service asset at amortized value, acquired in business combination.
US States and Political Subdivisions Debt Securities [Member]
Obligations of States and Political Subdivisions [Member]
Residential Portfolio Segment [Member]
One-to-Four Family Residential [Member]
Depreciation and amortization of premises and equipment.
Depreciation And Amortization1
Depreciation and amortization of premises and equipment
Short-Term Lease, Cost
Short-term lease cost
Income Tax, Policy [Policy Text Block]
Income taxes
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, Tax
Amortization of prior service credit, tax
COVID 19.
C O V I D19 [Member]
COVID-19 [Member]
2026
Sales-Type and Direct Financing Leases, Lease Receivable, to be Received, Year Four
Interest payments on variable rate commercial real estate loans.
Interest Payments On Variable Rate Commercial Real Estate Loans [Member]
Interest Payments On Variable Rate Commercial Real Estate Loans [Member]
Amortized cost of investment securities excluding equities and U.S. government or government agency issued or guaranteed securities.
Securities With Disclosed Rating Amortized Cost
Total securities with disclosed rating, Amortized Cost
The average balance of assets during the period calculated as the average of the asset balances as of the end of each day in the period.
Average Assets
Average total assets
Amount of cash inflow (outflow) from the net change of accrued income and expenses.
Increase Decrease In Accrued Income And Expenses
Net change in accrued income and expense
Amortized cost of collateralized mortgage obligations included in mortgage-backed securities.
Collateralized Mortgage Obligations Amortized Cost
Collateralized mortgage obligations, Amortized cost
US Treasury and Government [Member]
U.S. Treasury and Federal Agencies [Member]
Repossessed Assets
Assets taken in foreclosure of defaulted loans measured at fair value on a nonrecurring basis
Repossessed Assets, Total
Fiduciary and Trust [Member]
Trust Income [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Instruments And Hedging Activities Disclosures [Line Items]
The tabular disclosure of commitments.
Commitments Table [Text Block]
Commitments and Contingent Liabilities Outstanding
Preferred Stock, Shares Authorized
Preferred stock, shares authorized
Income (loss) before income taxes and equity in undistributed income of subsidiaries.
Income Loss Before Income Taxes And Equity In Undistributed Income Of Subsidiaries
Income before income taxes and equity in undistributed income of subsidiaries
Delinquent period of loans resulting in accrued Interest being charged against income description.
Delinquent Period Of Loans Resulting In Accrued Interest Being Charged Against Income Description
Delinquent period of loans resulting in accrued interest being charged against income description
2027
Derivative Notional Amount To Expire In Year Five
Derivative notional amount to expire in year five.
Automobile Loan [Member]
Automobile [Member]
Other comprehensive income loss net yield adjustment from cash flow hedges, before tax.
Other Comprehensive Income Loss Net Yield Adjustment From Cash Flow Hedges Before Tax
Net yield adjustment from cash flow hedges currently in effect, before tax
Derivative, Average Remaining Maturity
Average Maturity (in years)
Preferred Stock, Liquidation Preference Per Share
Preferred stock, liquidation preference per share
Hedge Funds [Member]
Other Hedge Funds [Member]
Defined benefit plan increase of twenty five basis point decrease in discount rate on benefit obligation.
Defined Benefit Plan Increase Of Twenty Five Basis Point Decrease In Discount Rate On Benefit Obligation
Effect of 25 basis point decrease in discount rate on benefit obligation
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
Components of Income Tax Expense
Operating Lease, Weighted Average Discount Rate, Percent
Weighted-average discount rate
Corporate, Non-Segment [Member]
All Other [Member]
All Other [Member]
Financing receivable allowance for credit losses net write offs.
Financing Receivable Allowance For Credit Losses Net Write Offs [Abstract]
Net charge-offs
Investment, Name [Domain]
Investment, Name
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block]
Capital Ratios and Amounts of Company and its Banking Subsidiaries
Variable Rate [Axis]
Variable Rate
Increase (decrease) in estimated fair value of interest rate contracts in asset position.
Increase Decrease In Estimated Fair Value Of Interest Rate Contracts In Asset Position
Reduction in estimated fair value of interest rate contracts in asset position
Entity Small Business
Entity Small Business
Total amount of receivables due from an entity that is affiliated with the reporting entity by means of direct or indirect ownership.
Due From Subsidiaries
Total due from consolidated bank subsidiaries
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents
Cash, cash equivalents and restricted cash at end of period
Cash, cash equivalents and restricted cash at beginning of period
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Total
Preferred Stock, Dividend Payment Terms
Dividend payment terms
Percentage of pension plan assets that is not exceeded by investment in security of single non US government or government agency.
Percentage Of Pension Plan Assets That Is Not Exceeded By Investment In Security Of Single Non Us Government Or Government Agency
Percentage of pension plan assets that is not exceeded by investment in security of single Non-US Government of Government agency
Compensation Related Costs, Policy [Policy Text Block]
Stock-based compensation
Fair Value Measurement Inputs and Valuation Techniques [Table]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Table]
Other comprehensive income minimum pension liability net adjustments before tax.
Other Comprehensive Income Minimum Pension Liability Net Adjustments Before Tax
Decrease in minimum liability adjustment
Financing Receivable, Held-for-Sale, Not Part of Disposal Group, after Valuation Allowance
Mortgage loans held for sale
Financing Receivable, Held-for-Sale, Not Part of Disposal Group, after Valuation Allowance, Beginning Balance
Financing Receivable, Held-for-Sale, Not Part of Disposal Group, after Valuation Allowance, Ending Balance
Hedging Relationship [Axis]
Hedging Relationship
Mortgage-Backed Securities, Issued by US Government Sponsored Enterprises [Member]
Government Issued or Guaranteed [Member]
Government Issued or Guaranteed [Member]
Investments [Domain]
Investments
Commitments to extend credit to commercial customers.
Commitments To Extend Credit To Commercial Customers
Commitments to extend credit to commercial customers
Mortgage servicing rights of commercial mortgage loans with outstanding principal balances of privately held commercial mortgage company.
Mortgage Loans Of Privately Held Company
Outstanding principal balances of mortgage servicing rights
Fannie Mae and Freddie Mac preferred stock.
Fannie Mae And Freddie Mac Preferred Stock [Member]
Fannie Mae And Freddie Mac Preferred Stock
Accumulated other adjustment.
Accumulated Other Adjustment [Member]
Accumulated Other Adjustment [Member]
Maximum delinquent period for nonaccrual status loans secured by real estate to be returned to accrual status.
Loans Secured By Real Estate Delinquent Period Threshold For Return To Accrual Status
Loans secured by real estate delinquent period threshold for return to accrual status
Provident Trust three statutory rate due two zero three three.
Provident Trust Three Statutory Rate Due Two Zero Three Three [Member]
Provident Statutory Trust III - Due 2033 [Member]
Stock Redeemed or Called During Period, Value
Redemption of Series A and Series C preferred stock
Debt Instrument, Redemption, Period [Domain]
Debt Instrument, Redemption, Period
Occupancy, Net
Equipment and net occupancy
Interest bearing deposits held in a money market savings account at subsidiary bank.
Due From Subsidiaries Money Market Savings
Money-market savings
Transfers and Servicing [Abstract]
Provident Trust I - 8.29%, due 2028.
Provident Trust One Fixed Rates Due Two Zero Two Eight [Member]
Provident Trust I - 8.29%, due 2028 [Member]
Banking Regulation, Tier 1 Risk-Based Capital, Actual
Amount
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment [Line Items]
Additional Collateral, Aggregate Fair Value
Fair value of additional collateral to be posted for derivative financial instruments
Not rated.
Not Rated [Member]
Not Rated [Member]
Employee.
Employee [Member]
Deferred Bonus Plan [Member]
Forward starting interest rate swap agreements.
Forward Starting Interest Rate Swap Agreements [Member]
Forward-Starting Interest Rate Swap Agreements [Member]
Interest on short-term borrowings
Interest Expense, Short-Term Borrowings
Short-term borrowings
Interest Expense, Short-term Borrowings, Total
Investment securities
Marketable Securities [Abstract]
Weighted Average Number of Shares Outstanding, Basic
Weighted-average shares outstanding
Weighted Average Number of Shares Outstanding, Basic, Total
City Area Code
City Area Code
Geographic Distribution, Foreign [Member]
Geographic Distribution, Foreign [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value
Aggregate Intrinsic Value, Outstanding, Ending balance
Other private equity.
Other Private Equity [Member]
Other Private Equity [Member]
The tax effect of the accumulated change in equity from transactions and other events and circumstances from non-owner sources. Excludes the tax effect of Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes the tax effect of 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.
Accumulated Other Comprehensive Income Loss Income Tax
Ending balance, tax
Beginning balance, tax
Federal Housing Administration Loan [Member]
FHA Guaranteed Mortgage Loans [Member]
Schedule of Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Table Text Block]
Computations of Diluted Earnings Per Common Share
Other financial instruments.
Other Financial Instruments [Abstract]
Other financial instruments:
Carrying amount of debt securities accounted for as held-to-maturity, net of adjustments including, but not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized, and fair value hedge accounting adjustments, that have single maturity date.
Held To Maturity Securities Debt Maturities With Single Maturity Date Net Carrying Amount
Total available for held to maturity (amortized cost)
Ratio
Tier One Capital To Risk Weighted Assets
Tier one capital to risk weighted assets.
Comprehensive Income (Loss) Note [Text Block]
Comprehensive income
Defined Benefit Plan, Funded (Unfunded) Status of Plan
Funded status
Defined Benefit Plan, Funded (Unfunded) Status of Plan, Total
Share-Based Payment Arrangement [Abstract]
Interest Rate Contract [Member]
Interest Rate Contracts [Member]
OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment and Tax
Unrealized holding gains (losses), net, before tax
Amortized cost and estimated fair value of collateralized mortgage obligations.
Amortized Cost And Estimated Fair Value Of Collateralized Mortgage Obligations Table [Text Block]
Amortized Cost and Estimated Fair Value of Collateralized Mortgage Obligations
Number of single investment securities that exceeded ten percent of shareholders' equity.
Number Of Single Investment Securities That Exceeded Ten Percent Of Shareholders Equity
Number of investment securities that exceeded ten percent of shareholders' equity
Liabilities
Total liabilities
Defined benefit plan contributions by employer to qualified benefit pension plans.
Defined Benefit Plan Contributions By Employer To Qualified Benefit Pension Plans
Qualified benefit pension plans
Variable interest entity disclosure.
Variable Interest Entity Disclosure [Abstract]
Other Assets
Other assets
Other Assets, Total
Document Period End Date
Document Period End Date
Restricted Stock [Member]
Restricted Stock [Member]
Commitments to extend credit.
Commitments To Extend Credit [Abstract]
Commitments to extend credit
Common Stock, Dividends, Per Share, Cash Paid
Common stock per share dividend amount
Banking Regulation, Tier 1 Leverage Capital Ratio, Capital Adequacy, Minimum
Leverage - Tier 1 capital to average total assets, as defined
Total
Sales-Type and Direct Financing Leases, Lease Receivable, Payments to be Received
Schedule of Finite-Lived Intangible Assets [Table]
Schedule Of Finite Lived Intangible Assets [Table]
Financing Receivable, Credit Quality Indicator [Table]
Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Table]
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-Based Compensation Cost
Stock-based compensation
Repurchase and Resale Agreements Policy [Policy Text Block]
Securities purchased under agreements to resell and securities sold under agreements to repurchase
Deposits
Business combination recognized identifiable assets acquired and liabilities assumed deposits
Business combination recognized identifiable assets acquired and liabilities assumed deposits.
Amount of deferred tax asset attributable to taxable temporary differences from deferred expense compensation and benefits postretirement and other employee benefits.
Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Postretirement And Other Employee Benefits
Postretirement and other employee benefits
Long term debt two thousand twenty one.
Long Term Debt Two Thousand Twenty One [Member]
Term Loans 2021 [Member]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)
Net periodic pension cost (benefit)
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Benefits
Retirement benefits
Debt Securities, Available-for-Sale, Amortized Cost
Investment securities, available for sale, amortized cost
Investment securities available for sale, amortized cost
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net
Purchased Impaired
Cumulative effect on retained earnings net of tax.
Cumulative Effect On Retained Earnings Net Of Tax
Cumulative effect of change in accounting principle ?equity securities
Schedule of Segment Reporting Information, by Segment [Table Text Block]
Information about Company's Segments
2023
Finite-Lived Intangible Asset, Expected Amortization, Year One
Estimated amortization expense in 2022
Statistical Measurement [Axis]
Statistical Measurement
M&T member
M T [Member]
MT
Residential [Member]
Residential Mortgage-Backed Securities [Member]
Other securities gross unrealized gains.
Other Securities Gross Unrealized Gains
Other securities, Gross unrealized gains
Net change in the equity in undistributed income of subsidiaries.
Equity In Undistributed Income Of Subsidiaries
Equity in undistributed income of subsidiaries
Equity in undistributed income of subsidiaries
Common equity tier one risk based capital.
Common Equity Tier One Risk Based Capital
Amount
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months
Estimated fair value, Less than 12 months
Summary of Merger Related Expenses
Summary of merger-related expenses [Table Text Block]
Summary of merger-related expenses.
Leveraged Leases, Net Investment in Leveraged Leases Disclosure, Investment in Leveraged Leases, Net
Investment in leveraged leases
Schedule of Net Funded Status [Table Text Block]
Data Relating to Funding Position of Defined Benefit Plans
Readily marketable securities at fair value amortized cost.
Readily Marketable Securities At Fair Value Amortized Cost
Readily marketable securities Amortized cost
Unrealized losses
Deferred Tax Assets Unrealized Losses Investment Securities
Deferred tax assets unrealized losses investment securities.
Deferred Compensation Arrangement with Individual, Shares Issued
Shares issued in connection with deferred compensation plans
2023
Defined Benefit Plan, Expected Future Benefit Payment, Year One
Debt Securities, Available-for-Sale, Maturity, without Single Maturity Date, Amortized Cost
Mortgage-backed securities available for sale
Later years
Finite-Lived Intangible Asset, Expected Amortization, after Year Five
Related Party [Axis]
Related Party
Assets
Total assets of partnerships in which the company invested
Total assets
Residential real estate excluding Alt-A.
Residential Real Estate Excluding Alt A [Member]
Residential [Member]
Derivative Contract [Domain]
Derivative Contract
Allowance for Loan and Lease Losses Write-offs, Net
Net charge-offs
Allowance for Loan and Lease Losses Write-offs, Net, Total
Long term debt two thousand seventeen.
Long Term Debt Two Thousand Seventeen [Member]
Term Loans 2017 [Member]
Preferred Stock, Dividends Per Share, Declared
Preferred stock, dividend declared per share
Amount of revenues related to international trust related services, including wealth management services, offered internationally.
Revenues From International Trust Related Services
Revenues from international trust-related services
Previously Reported [Member]
Previously Reported [Member]
Loan Restructuring Modification [Domain]
Loan Restructuring Modification
Derivative [Line Items]
Derivative [Line Items]
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax
Pre-tax adjustment to AOCI
Furniture and Fixtures, Gross
Furniture and equipment
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase
Rate of increase in future compensation levels
Servicing Asset at Amortized Cost, Amortization
Amortization
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Earnings Per Share, Diluted
Diluted
Diluted earnings per common share
Earnings Per Share, Diluted, Total
Retirement Plan Type [Axis]
Retirement Plan Type
Net Income (Loss) Available to Common Stockholders, Basic [Abstract]
Net income available to common shareholders
Income available to common shareholders:
Residential mortgage banking segment.
Residential Mortgage Banking [Member]
Residential Mortgage Banking [Member]
Schedule of Short-Term Debt [Table Text Block]
Amounts and Interest Rates of Short-term Borrowings
Fixed Rate Term Loans 5.40% due 2025 [Member]
Fixed Rate Term Loans Of Five Point Four Zero Senior Notes Due Two Thousand Twenty Five [Member]
Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Prepayment Speed
Weighted-average prepayment speeds
Trading account
Debt Securities, Trading, and Equity Securities, FV-NI
Debt Securities, Trading, and Equity Securities, FV-NI, Total
Financing Receivable, Troubled Debt Restructuring, Premodification
Pre-modification Recorded Investment
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Reclassifications (to) from Nonaccretable Difference
Reclassifications from nonaccretable balance
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Reclassifications (to) from Nonaccretable Difference, Total
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase
Rate of increase in future compensation levels
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Pledged Status [Axis]
Entity Address, Postal Zip Code
Entity Address, Postal Zip Code
Credit related fee income.
Credit Related Fee Income
Credit-related fee income
Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 20 Percent Adverse Change in Prepayment Speed
Impact on fair value of 20% adverse change
Other Liabilities [Member]
Accrued interest and other liabilities [Member]
Series F fixed-to-floating rate non-cumulative perpetual preferred stock.
Series F Fixed To Floating Rate Non Cumulative Perpetual Preferred Stock [Member]
Series F Fixed-to-Floating Rate Non-Cumulative Perpetual Preferred Stock [Member]
Revenue from Contract with Customer, Including Assessed Tax
Revenue from contract with customer
Maximum percentage of total consolidated revenues generated from a single external customer.
Percent Of Maximum Revenue From Single Customer On Revenue
Percent of maximum revenue from single customer on total revenues
Revision of Prior Period [Axis]
Revision of Prior Period
Document Fiscal Period Focus
Document Fiscal Period Focus
Schedule of amortized cost and estimated fair value of investment securities.
Schedule Of Amortized Cost And Estimated Fair Value Of Investment Securities [Line Items]
Schedule Of Amortized Cost And Estimated Fair Value Of Investment Securities [Line Items]
Unrealized gain (losses) on cash flow hedges
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax
Criticized nonaccrual.
Criticized Nonaccrual [Member]
Criticized Nonaccrual [Member]
Servicing Asset at Amortized Cost
Amortized value, ending balance
Amortized value, Beginning balance
Capitalized servicing rights
Other Debt Obligations [Member]
Other Debt Securities [Member]
Current Income Tax Expense (Benefit)
Total current
Pension Plan [Member]
Pension Benefits [Member]
Revolving Credit Facility [Member]
Revolving Loans [Member]
Core deposit and other intangible assets
Business combination recognized identifiable assets acquisition of core deposits and other intangible assets
Business combination recognized identifiable assets acquisition of core deposits and other intangible assets.
Preferred stock, $1.00 par, 20,000,000 shares authorized; Issued and outstanding: Liquidation preference of $1,000 per share: 350,000 shares at December 31, 2022 and December 31, 2021; Liquidation preference of $10,000 per share: 140,000 shares at December 31, 2022 and 2021; Liquidation preference of $25 per share: 10,000,000 shares at December 31, 2022
Preferred Stock, Value, Issued
Carrying Value
Preferred Stock, Value, Issued, Total
Preferred Stock, Value, Issued, Beginning Balance
Preferred Stock, Value, Issued, Ending Balance
Servicing Asset at Amortized Cost, Additions
Purchases
Common stock awards converted
Business Combination Consideration Transferred Common Stock Awards Converted
Business combination consideration transferred common stock awards converted.
Derivative [Table]
Derivative [Table]
The investment of pension plan assets in a mutual fund investment category as a percentage of total investment in mutual funds.
Percentage Of Investment In Mutual Fund
Investment in mutual funds
Option Indexed to Issuer's Equity, Type [Axis]
Option Indexed to Issuer's Equity, Type
Payments for (Proceeds from) Other Investing Activities
Other, net
Interest Income (Expense), Net
Net interest income
Net interest income
Pension plans, postretirement and other employee benefits.
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements
Plus: Incremental shares from assumed conversion of stock-based compensation awards and warrants to purchase common stock
Incremental Common Shares Attributable to Share-based Payment Arrangements, Total
Other Income and Other Expense Disclosure [Text Block]
Other income and other expense
Consumer real estate.
Consumer Real Estate [Member]
Consumer Real Estate [Member]
Operating Lease, Liability
Operating lease liabilities
Operating Lease, Liability, Total
Servicing Assets at Fair Value [Line Items]
Servicing Assets at Fair Value [Line Items]
Payments to acquire equity and other securities investments.
Payments To Acquire Equity And Other Securities Investments
Purchases of investment securities equity and other
2027
Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Five
Net Cash Provided by (Used in) Financing Activities
Net cash provided (used) by financing activities
Increase decrease in taxes.
Increase Decrease In Taxes [Abstract]
Increase (decrease) in taxes:
Home Equity Line of Credit [Member]
Home Equity Loans and Lines of Credit [Member]
Defined Benefit Plan, Benefit Obligation, Contributions by Plan Participant
Plan participants’ contributions
Amount of domestic interest-bearing checking and savings accounts, which may include money market accounts, NOW accounts, interest-bearing corporate checking accounts, brokered deposits and other savings accounts.
Savings And Interest Checking Deposits
Savings and interest-checking deposits
Savings and interest-checking deposits
Number of state and local jurisdictions where company files income tax returns.
Number Of State And Local Jurisdictions Where Company Files Income Tax Returns
Number of state and local jurisdictions where company files income tax returns
Merchant discount fee income.
Merchant Discount Fee Income
Merchant discount fee income
Fixed rate term loans of two point five zero senior notes due two thousand twenty two.
Fixed Rate Term Loans Of Two Point Five Zero Senior Notes Due Two Thousand Twenty Two [Member]
Fixed Rate Term Loans 2.50% Due 2022 [Member]
Other Liabilities, Fair Value Disclosure
Other liabilities
Short-Term Debt, Type [Axis]
Short-term Debt, Type
Statement of Financial Position [Abstract]
Valuation Allowance for Impairment of Recognized Servicing Assets, Additions (Deductions) for Expenses (Recoveries)
Valuation Charge Recognized
Valuation Allowance for Impairment of Recognized Servicing Assets, Additions (Deductions) for Expenses (Recoveries), Total
Ratings of investment securities.
Ratings Of Investment Securities Table [Text Block]
Investment Ratings of All Privately Issued Mortgage-Backed Securities and Other Debt Securities
Debt Security, Government, Non-US [Member]
Non-U.S. Government [Member]
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax
Net adjustment to AOCI
Other hedge funds.
Other Hedge Funds [Member]
Other Hedge Funds [Member]
Securities Act File Number
Entity File Number
Net gain on sales of assets
Gain (Loss) on Disposition of Assets for Financial Service Operations
Gain (Loss) on Disposition of Assets for Financial Service Operations, Total
Restricted Stock Outstanding, Assumed in business combination
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Assumed In Business Combination
Share based compensation arrangement by share based payment award equity instruments other than options assumed in business combination.
Accumulated other.
Accumulated Other [Member]
Other [Member]
Investment in debt securities gross unrealized losses.
Investment In Debt Securities Gross Unrealized Losses
Total debt securities Gross unrealized losses
Acquisition, net of cash consideration, Bank and bank holding company
Proceeds from Previous Acquisition
Statement of Cash Flows [Abstract]
Net change in accrued interest receivable, payable.
Net Change In Accrued Interest Receivable Payable
Net change in accrued interest receivable, payable
Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year One Through Five
Due after one year through five years
International activities.
International Activities Disclosure [Text Block]
International Activities
Other credit-related commitments.
Other Credit Related Commitments
Other credit-related commitments
Cost Method Investments
Cost method investment securities
Series H Fixed-to-Floating Rate Non-cumulative Perpetual Preferred Stock [Member]
Series H Fixed-to-Floating Rate Non-cumulative Perpetual Preferred Stock [Member]
Defined Benefit Plan, Debt Security [Member]
Total Debt Securities [Member]
Valuation Approach and Technique [Domain]
Valuation Approach and Technique
Line of Credit Facility, Current Borrowing Capacity
Line of credit facility
Identifiable assets
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract]
Increase (Decrease) in Loans Held-for-sale
Net change in loans originated for sale
Increase (Decrease) in Loans Held-for-sale, Total
Retirement Benefits [Text Block]
Pension plans and other postretirement benefits
Common stock issuable, 14,031 shares at December 31, 2022; 15,769 shares at December 31, 2021
The obligation to issue shares of company common stock in connection with deferred compensation plans.
Common Stock Issuable
Geographical [Domain]
Geographical
Schedule of Earnings Per Share, Basic, by Common Class, Including Two Class Method [Table Text Block]
Computations of Basic Earnings Per Common Share
Statistical Measurement [Domain]
Statistical Measurement
Defined benefit pension plan, reduction to change in amortization
Defined Benefit Plan, Actuarial Gain (Loss), Immediate Recognition as Component in Net Periodic Benefit (Cost) Credit
Statement of Stockholders' Equity [Abstract]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable Allowance For Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans Receivable, Fair Value Disclosure
Loans measured at fair value on nonrecurring basis
Expense.
Expense [Abstract]
Expense
B B B credit rating.
B B B Credit Rating [Member]
BBB [Member]
Auditor Location
Auditor Location
Bayview Lending Group and Bayview Financial.
Bayview Lending Group And Bayview Financial [Member]
Bayview Lending Group and Bayview Financial [Member]
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance
Amortized Cost with Allowance
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, Tax
Current year benefit plans gains (loss),tax
Current year benefit plans gains loss, tax
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, Tax, Total
Contractual Interest Rate Reduction [Member]
Interest Rate Reduction [Member]
Goodwill And Other Intangible Assets [Table]
Goodwill And Other Intangible Assets [Table]
Goodwill And Other Intangible Assets [Table]
Class of Stock [Domain]
Class of Stock
Interest and Dividend Income, Securities, by Taxable Status [Abstract]
Investment securities
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, after Year 10
Due after ten years
Defined Benefit Plan, Benefit Obligation, Period Increase (Decrease)
Defined benefit pension plans
Defined Benefit Plan, Benefit Obligation, Period Increase (Decrease), Total
Liability, Defined Benefit Plan
Accrued liability recognized in the consolidated balance sheet
Liability, Defined Benefit Plan, Total
Revenue Benchmark [Member]
Sales Revenue, Net [Member]
Gain on Sale of Investments
Net gain on securities sold
Revenue from Contract with Customer [Policy Text Block]
Revenue from contracts with customers
Legal Entity [Axis]
M&T Bank [Member]
Debt Securities, Available-for-Sale, Amortized Cost, Fiscal Year Maturity [Abstract]
Debt securities available for sale:
Lease, Cost [Table Text Block]
Summary of Lease Costs for Operating Leases, Cash Paid Toward Lease Liabilities, and Weighted-Average Remaining Term and Discount Rates of Operating Leases
Equity Method Investment, Ownership Percentage
Minority interest in Bayview Lending Group LLC
Short-Term Debt, Average Outstanding Amount
Daily-average amount outstanding
Fair Value, by Balance Sheet Grouping [Table Text Block]
Carrying Amounts and Estimated Fair Value for Financial Instrument Assets (Liabilities)
Fair Value Disclosures [Text Block]
Fair value measurements
Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 10 Percent Adverse Change in Discount Rate
Impact on fair value of 10% adverse change
Certain loans acquired in transfer accounted for as debt securities accretable yield accretion.
Certain Loans Acquired In Transfer Accounted For As Debt Securities Accretable Yield Accretion Table [Text Block]
Summary of Changes in Accretable Yield for Acquired Loans
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price
Weighted-Average Exercise Price, Expired
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Net of Forfeitures
Stock Options Outstanding, Granted
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures, Total
Peoples United Financial, Inc. [Member]
Peoples United Financial Inc [Member]
Peoples United Financial Inc
Accounting Standards Update 2014-09 [Member]
ASU 2014-09 [Member]
Series A series C and series E preferred stock.
Series A Series C And Series E Preferred Stock [Member]
Series A Series C Series And E Preferred Stock [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term
Weighted-Average Life (In Years), Exercisable
Proceeds from Stock Options Exercised
Cash realized from exercise of stock options
Amount of accumulated unrealized loss on investments in debt and equity securities that have been in a continuous loss position for twelve months or longer.
Investment Securities Continuous Unrealized Loss Position Twelve Months Or Longer Aggregate Losses
Investment Securities Continuous Unrealized Loss Position Twelve Months or Longer Aggregate Losses
Long-Term Debt, Type [Axis]
Long-term Debt, Type
2028 through 2032
Defined Benefit Plan, Expected Future Benefit Payment, after Year Five for Next Five Years
Information Technology and Data Processing
Outside data processing and software
Deferred Income Tax Expense (Benefit)
Provision for deferred income taxes
Total deferred
Other real estate partnerships.
Other Real Estate Partnerships [Member]
Other Real Estate Partnerships [Member]
Proceeds from Interest Received
Interest received during the period
Interest received during the year
Residential Mortgage [Member]
Residential Mortgage Loans [Member]
Property, Plant and Equipment [Table Text Block]
Summary of Premises and Equipment
Disclosure of Share-Based Compensation Arrangements by Share-Based Payment Award [Table Text Block]
Summary of Stock Option Activity
Proceeds from (Payments for) Other Financing Activities
Other, net
Unpaid principal balance
Impaired Financing Receivable, Unpaid Principal Balance
Total
Debt and Equity Securities, Realized Gain (Loss)
Gross realized gains(loss) on sale of investment securities
Debt and Equity Securities, Realized Gain (Loss), Total
Revenue from Contract with Customer [Text Block]
Revenue from contracts with customers
Fair value of investment securities excluding equities and U.S. government or government agency issued or guaranteed securities.
Securities With Disclosed Rating Estimated Fair Value
Total securities with disclosed rating, Estimated Fair Value
Gross realized gain loss on securities.
Gross Realized Gain Loss On Securities
Gross realized gains on investment securities
Unusual Risk or Uncertainty, Nature [Axis]
COVID-19 [Member]
Interest and Fee Income, Loans and Leases
Loans and leases, including fees
Interest and Fee Income, Loans and Leases, Total
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax
Amortization of actuarial (loss) gain
Amortization of actuarial losses, before tax
Losses on cash flow hedges
Deferred Tax Assets Losses on Cash Flow Hedges
Deferred tax assets losses on cash flow hedges.
Proceeds from Maturities, Prepayments and Calls of Held-to-Maturity Securities
Proceeds from maturities of investment securities Held to maturity
Treasury stock.
Treasury Stock Policy [Text Block]
Treasury stock
Line of Credit Facility, Maximum Borrowing Capacity
Borrowing facilities available with FHLB's amount
Federal Home Loan Bank Stock and Federal Reserve Bank Stock
Other securities, Estimated fair value
Federal Home Loan Bank Stock and Federal Reserve Bank Stock, Total
Equity in undistributed income of subsidiaries.
Equity In Undistributed Income Of Subsidiaries [Abstract]
Equity in undistributed income of subsidiaries
Preferred Stock, Par or Stated Value Per Share
Preferred stock, par value
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax
Investment securities available for sale, gross unrealized gains
Accretion of net gain on terminated cash flow hedges, before tax
Accretion of net gain on terminated cash flow hedges
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax
Foreign exchange and other option and futures contracts.
Foreign Exchange And Other Option And Futures Contracts [Member]
Foreign Exchange and Other Option and Futures Contracts [Member]
Other diversified mutual fund.
Other Diversified Mutual Fund [Member]
Other Diversified Mutual Fund [Member]
Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Discount Rate
Weighted average discount rates used to estimate fair value of capitalized mortgaged loan servicing assets
Weighted-average discount rate
Commercial loans and leases.
Commercial Loans And Leases [Member]
Commercial Loans and Leases [Member]
Credit Facility [Domain]
Credit Facility
Interest Receivable and Other Assets
Accrued interest and other assets
Not Designated as Hedging Instrument [Member]
Derivatives Not Designated and Qualifying as Hedging Instruments [Member]
Weighted Average Number of Shares Outstanding, Diluted
Adjusted weighted-average shares outstanding
Loans, Notes, Trade and Other Receivables Disclosure [Text Block]
Loans and leases
Other comprehensive income loss net yield adjustment from cash flow hedges, tax.
Other Comprehensive Income Loss Net Yield Adjustment From Cash Flow Hedges Tax
Net yield adjustment from cash flow hedges currently in effect, tax
Relationship with other entities.
Relationship With Other Entities [Text Block]
Relationship with Bayview Lending Group LLC and Bayview Financial Holdings, L.P.
The threshold number of days in delinquency at which criticized loans are generally classified as non-accrual.
Loan Delinquent Period For Non Accrual Status Classification
Loan delinquent period
Unsecured Debt
Variable\fixed rates term loan amount
Unsecured Debt, Total
Finite-Lived Intangible Assets, Major Class Name [Domain]
Finite-Lived Intangible Assets, Major Class Name
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount
State and local income taxes, net of federal income tax effect
Credit Facility [Axis]
Credit Facility
Defined Benefit Plan, Plan Assets, Amount
Fair value of plan assets at end of year
Fair value of plan assets at beginning of year
Defined benefit plan fair value of plan assets
Defined Benefit Plan, Plan Assets, Amount, Total
Fixed rate long-term borrowings.
Fixed Rate Long Term Borrowings [Member]
Fixed Rate Long-Term Borrowings [Member]
Corporate Debt Securities [Member]
Corporate Debt Securities [Member]
Portion at Fair Value Measurement [Member]
Fair Value Disclosure Item Amounts [Default]
Portion at Fair Value Measurement [Member] [Default]
Net income
Business Acquisition, Pro Forma Net Income (Loss)
M&T.
M And T [Member]
M&T Bank Corporation [Member]
M&T Bank Corporation [Member]
Other Expenses
Loans and Leases Receivable, Allowance
Ending balance
Beginning balance
Allowance for credit losses
Loans and Leases Receivable, Allowance, Total
Amount of deferred tax asset attributable to taxable temporary differences from losses on loans and other assets.
Deferred Tax Assets Losses On Loans And Other Assets
Losses on loans and other assets
Variable rate term loans due two thousand twenty one.
Variable Rate Term Loans Due Two Thousand Twenty One [Member]
Variable Rate Term Loans Due 2021 [Member]
Series E fixed to floating rate non cumulative perpetual preferred stock.
Series E Fixed To Floating Rate Non Cumulative Perpetual Preferred Stock [Member]
Series E Fixed-To-Floating Rate Non-Cumulative Perpetual Preferred Stock [Member]
Other Interest and Dividend Income
Other
Readily marketable securities at fair value gross unrealized gains.
Readily Marketable Securities At Fair Value Gross Unrealized Gains
Readily marketable securities Gross unrealized gains
Defined Benefit Plan, Equity Securities, Non-US [Member]
International Equity Securities [Member]
Amortization of Mortgage Servicing Rights (MSRs)
Amortization of capitalized servicing rights
Amortization of capitalized mortgage servicing rights
Current Fiscal Year End Date
Current Fiscal Year End Date
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Compensation
Incentive and other compensation plans
Investment Type [Axis]
Investment Type
Interest Payable
Accrued interest payable
The number of individual investment securities in gross unrealized loss positions. Unrealized losses occur when the amortized cost of an investment security is greater than its estimated fair value.
Number Of Investment Securities With Gross Losses
Number of investment securities with aggregate gross unrealized losses
Loans and Leases Receivable, Nonperforming, Nonaccrual of Interest
Nonaccrual
Pension and Other Postretirement Benefits Cost (Reversal of Cost)
Defined contribution pension and retirement savings plans total expense
Pension and Other Postretirement Benefits Cost (Reversal of Cost), Total
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Component of Operating Income [Abstract]
Other income:
Business combinations
Defined Benefit Plan, Plan Assets, Business Combination
Cash flow hedges adjustments
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax
Financial Instruments [Domain]
Financial Instruments
4.55% fixed/variable due 2028 [Member]
Fixed and Variable Rate Four Point Five Five Percentage Due Two Thousand Twenty Eight [Member]
Fixed and variable rate four point five five percentage due two thousand twenty eight.
Long term debt two thousand nineteen.
Long Term Debt Two Thousand Nineteen [Member]
Term Loans 2019 [Member]
Entity Address, Address Line One
Entity Address, Address Line One
Pledging Purpose [Axis]
Readily marketable securities at estimated fair value.
Readily Marketable Securities At Estimated Fair Value
Readily marketable securities Estimated fair value
Repayments of Long-Term Debt
Payments on long-term borrowings
Repayments of Long-term Debt, Total
Schedule of amortized cost and estimated fair value of investment securities.
Schedule Of Amortized Cost And Estimated Fair Value Of Investment Securities [Table]
Schedule Of Amortized Cost And Estimated Fair Value Of Investment Securities [Table]
Defined Benefit Plan, Plan Assets, Category [Axis]
Defined Benefit Plan, Plan Assets, Category
Series H Preferred Stock [Member]
Series H Preferred Stock [Member]
Derivative Instruments, Gain (Loss) [Table Text Block]
Information about Fair Values of Derivative Instruments in Consolidated Statement of Income
Amount of tax expense (benefit) of reclassification adjustment from accumulated other comprehensive income of unrealized holding gain or loss on held to maturity securities arising during period.
Other Comprehensive Income Unrealized Holding Gain Loss On Held To Maturity Securities Arising During Period Tax
Amortization of unrealized holding losses on held-to-maturity securities, tax
Condensed Cash Flow Statement [Table Text Block]
Condensed Statement of Cash Flow
Debt, Weighted Average Interest Rate
Weighted-average variable rates payable
Derivatives, Fair Value [Line Items]
Derivatives, Fair Value [Line Items]
Document Annual Report
Document Annual Report
Derivative Asset, Subject to Master Netting Arrangement, before Offset of Collateral
Aggregate fair value of derivative financial instruments in asset position
Derivative Asset, Fair Value, Amount Not Offset Against Collateral, Total
Unallocated Financing Receivables [Member]
Unallocated [Member]
Finite-Lived Intangible Assets by Major Class [Axis]
Finite-Lived Intangible Assets by Major Class
Pension and other postretirement defined benefit plans assets liabilities net.
Pension And Other Postretirement Defined Benefit Plans Assets Liabilities Net
Net accrued asset (liability) recognized in the consolidated balance sheet
Amount before allowance of consumer installment revolving and home equity loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts.
Loans And Leases Receivable Consumer Installment Revolving And Home Equity
Consumer loans
Noninterest Expense [Abstract]
Other expense
Accretion of net gain on terminated cash flow hedges, net of tax
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax
Supplemental Cash Flow Information [Abstract]
Supplemental disclosure of cash flow information
Pass [Member]
Pass [Member]
Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]
Investment securities
Accounting Standards Update and Change in Accounting Principle [Text Block]
Recent accounting developments
Defined Benefit Plan, Benefit Obligation, Prescription Drug Subsidy Receipt
Medicare Part D reimbursement
Interest Income, Securities, Operating, Taxable
Fully taxable
Due after five years through ten years
Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10
Income Tax Expense (Benefit)
Income taxes
Income taxes
Income tax expense (benefit)
Income tax credits
Defined Benefit Plan, Accumulated Benefit Obligation
Accumulated benefit obligation
Owned assets.
Owned Assets [Member]
Owned Assets [Member]
Real Estate Owned, Transfer to Real Estate Owned
Real estate acquired in settlement of loans
Credit card interchange fee income.
Credit Card Interchange Fee Income
Credit card interchange fee income
Lease payments receivable
Direct Financing Lease, Lease Receivable
Impact in estimated fair value gain (losses ) on hedging instruments.
Impact In Estimated Fair Value Gain Losses On Hedging Instruments
Impact of estimated fair value gain (losses) on hedging instruments
Income Tax Disclosure [Text Block]
Income taxes
Preferred Stock, Shares Issued
Preferred stock, shares issued
Preferred stock, Shares Issued
Preferred Stock, Shares Issued, Total
Balance Sheet Location [Domain]
Balance Sheet Location
Leveraged Leases, Net Investment in Leveraged Leases Disclosure, Investment in Leveraged Leases, Net [Abstract]
Leveraged leases:
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), before Tax
Amendments and curtailments
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings
Included in earnings
Financing Receivable, Allowance for Credit Loss, Writeoff
Charge-offs
Revenue, Remaining Performance Obligation, Amount
Uncollected amounts receivable
Reduction in estimated fair value losses on hedging instruments.
Reduction In Estimated Fair Value Losses On Hedging Instruments
Reduction of estimated fair value losses on hedging instruments
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate
Discount rate
Income Tax Disclosure [Abstract]
Servicing Asset at Amortized Cost, Increase (Decrease) for Valuation Allowance Adjustment
Valuation allowance
Capitalized servicing rights, valuation allowance
Foreign currency and other option and futures contracts.
Foreign Currency And Other Option And Futures Contracts [Member]
Foreign Currency and Other Option and Futures Contracts [Member]
Financing Receivable, Troubled Debt Restructuring, Postmodification
Loans and leases, net of unearned discount
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss
Gross unrealized losses for held to maturity
Other comprehensive income loss reclassification adjustment for realized gains losses included in net income tax.
Other Comprehensive Income Loss Reclassification Adjustment For Realized Gains Losses Included In Net Income Tax
Gains (losses) realized in net income, tax
Broker-Dealer, Net Capital Requirement, SEC Regulation [Abstract]
Banking and Thrift [Abstract]
Defined Benefit Plan, Equity Securities, US [Member]
Domestic Equity Securities [Member]
2025
Sales-Type and Direct Financing Leases, Lease Receivable, to be Received, Year Three
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Face Amount of Mortgages
FHA gauranteed mortgage loan
The amount of interest and dividends receivable on pension plan assets, which have been excluded in the determination of the fair value of plan assets.
Interest And Dividend Receivable On Plan Assets
Interest and dividend receivable on plan assets
Reported Value Measurement [Member]
Carrying Amount [Member]
Federal Home Loan Bank Advances [Member]
FHLBs Facility [Member]
Significant accounting policies.
Significant Accounting Policies [Table]
Significant Accounting Policies [Table]
Fair Value Hierarchy and NAV [Axis]
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Goodwill and Intangible Assets Disclosure [Abstract]
Amount before tax of increase (decrease) in accumulated other comprehensive income (loss) related to the reclassification adjustment for other than temporary impairment (OTTI) related to factors other than credit loss on a previously impaired investment on held-to-maturity security.
Other Comprehensive Income Reclassification To Income Of Unrealized Holding Losses Before Tax
Amortization of unrealized holding losses on held-to-maturity securities
Stock Options Outstanding, Assumed in business combination
Share Based Compensation Arrangement By Share Based Payment Award Options Assumed In Business Combination In Period
Share based compensation arrangement by share based payment award options assumed in business combination in period.
Geographic Concentration Risk [Member]
Geographic Concentration Risk [Member]
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)
Amortization of prior service cost
Acquisition of bank and bank holding company, Common stock awards converted
Conversion of Stock, Amount Converted
Auditor Name
Auditor Name
Defined benefit plan accumulated other comprehensive income minimum pension liability net of tax.
Defined Benefit Plan Accumulated Other Comprehensive Income Minimum Pension Liability Net Of Tax
Minimum pension liability adjustment net of tax
Equity [Abstract]
Amortized cost and estimated fair value of investment securities.
Amortized Cost And Estimated Fair Value Of Investment Securities Table [Text Block]
Amortized Cost and Estimated Fair Value of Investment Securities
Period of time that delinquent loan principal or interest will result in previously accrued interest being charged against income.
Delinquent Period Of Loans Resulting In Accrued Interest Being Charged Against Income
Delinquent period of loans resulting in accrued interest being charged against income
Assets or Liabilities that Relate to Transferor's Continuing Involvement in Securitized or Asset-Backed Financing Assets, Policy [Policy Text Block]
Capitalized servicing rights
Other commercial construction.
Other Commercial Construction [Member]
Other Commercial Construction [Member]
Payment Deferral [Member]
Payment Deferral [Member]
Principal Deferral [Member]
Debt Instrument, Interest Rate, Stated Percentage
Interest rate of debt instrument
Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period
Shares issued
Related Party [Domain]
Related Party
Increment in amortization period
Increment in Amortization Period
Increment in amortization period.
Payments for proceeds from net investment in consolidated subsidiaries.
Payments For Proceeds From Net Investment In Consolidated Subsidiaries
Net investment in consolidated subsidiaries
Leveraged Leases, Net Investment in Leveraged Leases Disclosure, Deferred Income
Unearned income
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment and Tax
Current year benefit plans gains (loss), before tax
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment and Tax, Total
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss), before Reclassification and Tax
Foreign currency translation adjustment, before tax
Concentration Risk Benchmark [Domain]
Concentration Risk Benchmark
Accrued Liabilities and Other Liabilities
Accrued expenses and other liabilities
Accrued Liabilities and Other Liabilities, Total
Entity Filer Category
Entity Filer Category
Sensitivity Analysis of Fair Value of Interests Continued to be Held by Transferor, Servicing Assets or Liabilities, Impact of Adverse Change in Assumption [Line Items]
Sensitivity Analysis of Fair Value of Interests Continued to be Held by Transferor, Servicing Assets or Liabilities, Impact of Adverse Change in Assumption [Line Items]
Geographic Distribution [Axis]
Geographic Distribution
Gain (Loss) on Securitization of Financial Assets
Loss on securitization of assets
Charitable contributions
Charitable contributions
Charitable contributions.
Debt Securities, Held-to-Maturity, Allowance for Credit Loss
Allowance for credit losses
Debt Securities, Held-to-maturity, Allowance for Credit Loss, Total
Debt Securities, Held-to-maturity, Allowance for Credit Loss, Beginning Balance
Debt Securities, Held-to-maturity, Allowance for Credit Loss, Ending Balance
Commercial, financial, etc.
Commercial Financial Loan [Member]
Commercial Financial Loan [Member]
Schedule of Equity Method Investments [Line Items]
Schedule of Equity Method Investments [Line Items]
Assets, Total [Member]
Assets, Total [Member]
Percentage of assumed commitment expirations used in the fair value measurements of interest rate locks.
Percentage Of Fair Value Inputs Commitment Expirations
Commitment expirations
Preferred Stock Dividends, Income Statement Impact
Less: Preferred stock dividends
Pension Plans Postretirement And Other Employee Benefits [Table]
Pension Plans Postretirement And Other Employee Benefits [Table]
Pension Plans Postretirement And Other Employee Benefits [Table]
Plan amendment
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment
Changes in level three pension plan assets measured at fair value on recurring basis.
Changes In Level Three Pension Plan Assets Measured At Fair Value On Recurring Basis Table [Text Block]
Changes in Level 3 Pension Plan Assets Measured at Fair Value on Recurring Basis
Option Indexed to Issuer's Equity, Type [Domain]
Option Indexed to Issuer's Equity, Type
Loans and leases receivable.
Loans And Leases Receivable Table [Text Block]
Total Loans and Leases Outstanding
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax
Amortization of prior service credit, before tax
Amortization of prior service (cost) credit
Bayview Lending Group.
Bayview Lending Group [Member]
Bayview Lending Group [Member]
Loans and Leases Receivable, Net of Deferred Income
Loans and leases, net of unearned discount
Loans and leases, net of unearned discount
Assets Held under Capital Leases [Member]
Capital Leases [Member]
Leasehold Improvements, Gross
Leasehold improvements
Debt Securities, Held-to-Maturity, Fair Value, Maturity [Abstract]
Debt securities held to maturity:
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable Recorded Investment [Line Items]
2023
The notional amount of interest rate swap agreements entered into for risk management purposes that mature in next twelve months after the balance sheet date.
Derivative Notional Amount To Expire In Next Twelve Months
Entity Current Reporting Status
Entity Current Reporting Status
Maturity Period Two [Member].
Maturity Period Two [Member]
Maturity Period 2022 [Member]
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value
Held to maturity, Estimated fair value, 12 months or more
Asset Class [Domain]
Asset Class
Current State and Local Tax Expense (Benefit)
State and local
ICFR Auditor Attestation Flag
ICFR Auditor Attestation Flag
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Intrinsic Value
Aggregate Intrinsic Value, Exercisable
Banking Regulation, Total Risk-Based Capital Ratio, Actual
Total capital to risk-weighted assets, Minimum
Ratio
Commitments to sell real estate loans net.
Commitments To Sell Real Estate Loans Net
Commitments to sell real estate loans
Asset Impairment Charges
Asset write-downs
Asset Impairment Charges, Total
Changes in Cash Flow Hedges Derivative Instruments At Fair Value Net
Changes in Cash Flow Hedges Derivative Instruments At Fair Value Net
Changes in cash flow hedges derivative instruments at fair value net.
Noninterest Expense
Other expense
Total other expense
Debt Instrument, Measurement Input [Extensible Enumeration]
Measurement Input [Extensible List]
Domestic mutual fund debt securities.
Domestic Mutual Fund Debt Securities [Member]
Domestic Mutual Fund Debt Securities [Member]
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Categories of Investments [Domain]
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Categories of Investments
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Amortization of Prior Service Cost (Credit), Statement of Income or Comprehensive Income [Extensible Enumeration]
Stockholders' Equity Note Disclosure [Text Block]
Shareholders' equity
Combination of concession types.
Combination Of Concession Types [Member]
Combination of Concession Types [Member]
Business Combinations [Abstract]
Schedule of borrowings.
Schedule Of Borrowings [Table]
Schedule Of Borrowings [Table]
Supplemental pension plan.
Supplemental Pension Plan [Member]
Supplemental Pension Plan [Member]
Finite-Lived Intangible Assets, Net
Core deposit and other intangible assets
Net Carrying Amount
Finite-Lived Intangible Assets, Net, Beginning Balance
Finite-Lived Intangible Assets, Net, Ending Balance
Stockholders' Equity Attributable to Parent
Ending balance
Beginning balance
Shareholders’ equity
Total shareholders’ equity
Banking Regulation, Tier 1 Risk-Based Capital Ratio, Well Capitalized, Minimum
Tier 1 capital to risk-weighted assets, Well capitalized
Derivative Liability, Subject to Master Netting Arrangement, before Offset of Collateral
Aggregate fair value of derivative financial instruments in a liability position
Derivative Liability, Fair Value, Amount Not Offset Against Collateral, Total
Business banking segment.
Business Banking [Member]
Business Banking [Member]
AOCI Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss), Net [Member]
Fixed rate term loans of two point zero five senior notes due two thousand twenty.
Fixed Rate Term Loans Of Two Point Zero Five Senior Notes Due Two Thousand Twenty [Member]
Fixed Rate Term Loans Of Two Point Zero Five Senior Notes Due Two Thousand Twenty
Schedule of Expected Benefit Payments [Table Text Block]
Defined Benefit Plan Estimated Future Benefit Payments
Maximum credit risk for recourse associated with loans sold under Federal National Mortgage Association Delegated Underwriting and Servicing program.
Maximum Credit Risk For Recourse Associated With Loans Sold Under Federal National Mortgage Association Delegated Underwriting And Servicing Program
Maximum credit risk for recourse associated with loans sold under Federal National Mortgage Association Delegated Underwriting and Servicing program
Asset Class [Axis]
Asset Class
2024
Long-Term Debt, Maturity, Year Two
Documents Incorporated by Reference [Text Block]
Documents Incorporated by Reference [Text Block]
Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 20 Percent Adverse Change in Other Assumption
Impact on fair value of 20% adverse change
Entity Tax Identification Number
Entity Tax Identification Number
Income Statement Location [Axis]
Income Statement Location
Discounted cash flows.
Discounted Cash Flows [Member]
Discounted Cash Flows [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period
Restricted Stock Outstanding, Cancelled
Common stock, $.50 par, 250,000,000 shares authorized, 179,436,779 shares issued at December 31, 2022 and 159,741,898 shares issued at December 31, 2021
Common Stock, Value, Issued
Common Stock, Value, Issued, Total
Common Stock, Value, Issued, Beginning Balance
Common Stock, Value, Issued, Ending Balance
Consolidation Items [Axis]
Consolidation Items
Secured Debt
Secured loan facilities carrying amount
Secured Debt, Total
Retained Earnings (Accumulated Deficit)
Retained earnings
Retained Earnings (Accumulated Deficit), Total
Retained Earnings (Accumulated Deficit), Beginning Balance
Retained Earnings (Accumulated Deficit), Ending Balance
Unfunded commitments includes carrrying amount of its investments.
Unfunded Commitments Includes Carrrying Amount Of Its Investments
Unfunded commitments includes carrrying amount of its investments
OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment and Tax
Net unrealized gains (losses) on investment securities
OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment and Tax, Total
Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract]
Cash flows from investing activities
Equity Components [Axis]
Equity Components
Derivative, Gain (Loss) on Derivative, Net
Derivatives in fair value hedging relationships, Derivatives
Derivative, Gain (Loss) on Derivative, Net, Total
Payments of Ordinary Dividends, Preferred Stock and Preference Stock
Dividends paid — preferred
Borrowings
Business combination recognized identifiable assets acquired and liabilities assumed borrowings
Business combination recognized identifiable assets acquired and liabilities assumed borrowings.
This item represents the fair value of securities that have been in a continuous loss position for less than twelve months.
Investment Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value
Total investment securities, fair value less than 12 months
Consolidated Entities [Domain]
Consolidated Entities
Senior notes issued July two thousand and eighteen.
Senior Notes Issued July Two Thousand And Eighteen [Member]
Senior Notes Issued in July 2018 [Member]
Accounting Standards Update [Domain]
Accounting Standards Update
Amount of dividends available for payment to parent company after computation of banking subsidiaries earnings for the current year and preceding two years.
Funds Available For Payment Of Dividends To Parent Company From Banking Subsidiaries
Funds available for payment of dividends to M&T from banking subsidiaries
Accounting Standards Update 2016-13 [Member]
ASU 2016-13 [Member]
SEC Schedule, 12-04, Cash Dividends Paid to Registrant, Consolidated Subsidiaries
Less: dividends received
Cash and Cash Equivalents, Policy [Policy Text Block]
Consolidated Statement of Cash Flows
Share Based Compensation Arrangement By Share Based Payment Award Award Expiration Period
Share Based Compensation Arrangement By Share Based Payment Award Award Expiration Period
Stock options exercisable period, maximum
Leases [Abstract]
Leases
Supplies and Postage Expense
Printing, postage and supplies
Supplies and Postage Expense, Total
Debt Instruments [Abstract]
Long term debt prior period.
Long Term Debt Prior Period [Member]
Term Loans Prior Period [Member]
Disaggregation of Revenue [Table]
Disaggregation Of Revenue [Table]
Criticized accrual.
Criticized Accrual [Member]
Criticized Accrual [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value
Ending Balance
Beginning Balance
Recurring fair value measurements for certain Level 3 Assets and Liabilities
Equity Method Investments and Joint Ventures [Abstract]
Non interest expense excluding amortization and depreciation.
Non Interest Expense Excluding Amortization And Depreciation
Other noninterest expense
2025
Defined Benefit Plan, Expected Future Benefit Payment, Year Three
Entity Emerging Growth Company
Entity Emerging Growth Company
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss
Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or More Aggregate Losses
The tabular disclosure of components of other comprehensive income loss.
Components Of Other Comprehensive Income Loss Table [Text Block]
Components of Other Comprehensive Income (Loss) and Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) to Net Income
Schedule of Business Acquisitions, by Acquisition [Table]
Schedule Of Business Acquisitions By Acquisition [Table]
Amortization Method Qualified Affordable Housing Project Investments, Amortization
Amortization of investments in qualified affordable housing projects
Defined Benefit Plan, Interest Cost
Interest cost on benefit obligation
Interest cost
Non-PCD
Non PCD Acquired Loans [Member]
Non P C D Acquired Loans Member
Non PCD acquired loans.
Southern Financial Capital Trust III - due 2033.
Southern Financial Capital Trust Three Variable Rate Due Two Zero Three Three [Member]
Southern Financial Capital Trust III - due 2033 [Member]
Investment in debt securities estimated fair value.
Investment In Debt Securities Estimated Fair Value
Total debt securities Estimated fair value
Transfers and Servicing of Financial Assets, Policy [Policy Text Block]
Sales and securitizations of financial assets
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Change in plan assets:
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax
Net loss (gain)
Current Federal Tax Expense (Benefit)
Federal
Goodwill [Line Items]
Goodwill [Line Items]
Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five
Due after one year through five years
Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-Sale
Proceeds from maturities of investment securities Available for sale
Retirement Plan Type [Domain]
Retirement Plan Type
CANADA
Canada [Member]
Assumed weighted-average rates used to determine benefit obligations.
Assumed Weighted Average Rates Used To Determine Benefit Obligations Table [Text Block]
Assumed Weighted-Average Rates Used to Determine Benefit Obligations
Purchase Credit-Deteriorated
Purchase credit-deteriorated.
The date at which the preferred stock dividend rate or the frequency of dividend payments, or both, will change.
Preferred Stock Dividend Rate Modifications Date Of Change
Date of change in the dividend rate
Defined benefit plan fair value of plan assets disclosure.
Defined Benefit Plan Fair Value Of Plan Assets Disclosure Table [Text Block]
Fair Values of Company's Pension Plan Assets by Asset Category
Cumulative effect on retained earnings before tax.
Cumulative Effect On Retained Earnings Before Tax
Cumulative effect of change in accounting principle ?equity securities
Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract]
Cash flows from financing activities
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, after Tax
Amortization of prior service credit, net of tax
BB.
Bb [Member]
BB [Member]
Defined Benefit Plan, Plan Assets, Category [Domain]
Defined Benefit Plan, Plan Assets, Category
Proceeds from Sale, Maturity and Collection of Short-Term Investments
Proceeds from sales or maturities of investment securities
Proceeds from Sale, Maturity and Collection of Short-term Investments, Total
Schedule of Stock by Class [Table]
Schedule Of Stock By Class [Table]
Commercial Real Estate Portfolio Segment [Member]
Commercial Real Estate [Member]
Financing Receivable, Troubled Debt Restructuring [Table]
Schedule Of Financing Receivable Troubled Debt Restructurings [Table]
Other securities gross unrealized losses.
Other Securities Gross Unrealized Losses
Other securities, Gross unrealized losses
Financing Receivable, Allowance for Credit Loss [Table]
Schedule Of Financing Receivable Allowance For Credit Losses [Table]
Payments to Acquire Held-to-Maturity Securities
Purchases of investment securities Held to maturity
Impact of Changes [Member]
Revision of Prior Period, Change in Accounting Principle, Adjustment [Member]
Financing receivables that are thirty to eighty nine days past due.
Loans And Leases Receivable Thirty To Eighty Nine Days Past Due
30-89 Days Past Due
Deferred Tax Asset, Tax Deferred Expense, Reserve and Accrual, Accounts Receivable, Allowance for Credit Loss
Tax bad debt reserve
Significant accounting policies.
Significant Accounting Policies [Line Items]
Significant Accounting Policies [Line Items]
Series G fixed rate reset non-cumulative perpetual preferred stock.
Series G Fixed Rate Reset Non Cumulative Perpetual Preferred Stock [Member]
Series G Fixed-Rate Reset Non-Cumulative Perpetual Preferred Stock [Member]
Defined Benefit Plan, Service Cost
Service cost
Investment, Name [Axis]
Investment, Name
Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Increase (Decrease) for Purchase, Sale, and Settlement
Purchase(Sales)
Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Increase (Decrease) for Purchase, Sale, and Settlement, Total
Entity Voluntary Filers
Entity Voluntary Filers
Deferred Federal Income Tax Expense (Benefit)
Federal
Revenues from sub-servicing
Revenues From Subservicing
Revenues from sub-servicing
Unrealized Gain (Loss) on Interest Rate Cash Flow Hedges, Pretax, Accumulated Other Comprehensive Income (Loss)
Unrealized gain recognized in other comprehensive income related to cash flow hedges
Consumer Portfolio Segment [Member]
Consumer [Member]
Retirement Benefits [Abstract]
Compensation and Retirement Disclosure [Abstract]
Mortgage backed securities issued by private enterprises residential.
Mortgage Backed Securities Issued By Private Enterprises Residential [Member]
Privately Issued Mortgage-Backed Securities [Member]
Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10
Due after five years through ten years
Trading account and non-hedging derivative gains
Trading Gain (Loss)
Trading Gain (Loss), Total
Document Transition Report
Document Transition Report
Common stock issued in transaction
Sale of Stock, Number of Shares Issued in Transaction
Assets, Fair Value Disclosure
Total assets
2025
Long-Term Debt, Maturity, Year Three
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value
Weighted-Average Grant Price, Granted
Money market investment.
Money Market Investments [Member]
Money-Market Investments [Member]
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]
Information about Fair Values of Derivative Instruments in Consolidated Balance Sheet
Schedule of Segment Reporting Information, by Segment [Table]
Schedule Of Segment Reporting Information By Segment [Table]
Gain (Loss) on Derivative Instruments Held for Trading Purposes, Net
Derivatives not designated as hedging instruments, Derivatives
Variable interest entities and asset securitizations.
Variable Interest Entities And Asset Securitizations [Text Block]
Variable interest entities and asset securitizations
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
Accumulated Other Comprehensive Income (Loss), Net
Financing Receivable Portfolio Segment [Domain]
Financing Receivable Portfolio Segment
Sale of Stock, Price Per Share
Common stock, price per share
Commitments and Contingencies Disclosure [Text Block]
Commitments and contingencies
Loans and leases
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed Loans and Leases Net
Business combination recognized identifiable assets acquired and liabilities assumed loans and leases net.
Trust preferred securities included in tier one capital percent.
Trust Preferred Securities Included In Tier One Capital Percent
Trust preferred capital securities
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price
Weighted-Average Exercise Price, Exercised
2027
Sales-Type and Direct Financing Leases, Lease Receivable, to be Received, Year Five
Accumulated Other Comprehensive Income (Loss), Net of Tax
Ending balance, net of tax
Beginning balance, net of tax
Accumulated other comprehensive income (loss), net
Accumulated Other Comprehensive Income (Loss), Net of Tax, Total
Time Deposits
Time deposits
Time deposits
Time Deposits, Total
Marketable Securities, Policy [Policy Text Block]
Investment securities
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value
Total available for sale (fair value)
Regulatory assets.
Regulatory Assets [Abstract]
Entity Common Stock, Shares Outstanding
Entity Common Stock, Shares Outstanding
Deferred State and Local Income Tax Expense (Benefit)
State and local
Other Comprehensive Income (Loss), Net of Tax
Net gain (loss) during period
Total other comprehensive income (loss)
Revision of Prior Period [Domain]
Revision of Prior Period
Private Equity Funds [Member]
Other Private Equity [Member]
Commercial real estate segment.
Commercial Real Estate Segment [Member]
Commercial Real Estate [Member]
Net income (loss)
Net income (loss)
Net Income (Loss) Attributable to Parent
Net income
Weighted Average [Member]
Weighted Average [Member]
Reconciliation Of Unrecognized Tax Benefits [Table]
Reconciliation Of Unrecognized Tax Benefits [Table]
Reconciliation Of Unrecognized Tax Benefits [Table]
Salaries and employee benefits
Salaries and employee benefits.
New accounting pronouncement or change in accounting principle effect of adoption quantification.
New Accounting Pronouncement Or Change In Accounting Principle Effect Of Adoption Quantification1
Cumulative effect of change in accounting principle — credit losses
Securities Investment [Member]
Investment Securities [Member]
Other Investments and Securities, at Cost
Other securities, Amortized cost
Federal Home Loan Bank, Advances, Maturities Summary, Fixed Rate
Fixed rates advances from FHLB
Federal Home Loan Bank, Advances, Maturities Summary, Fixed Rate, Total
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
Assets and Liabilities Measured at Estimated Fair Value on Recurring Basis
Additional Paid-in Capital [Member]
Additional Paid-in Capital [Member]
Preferred Stock, Dividend Rate, Percentage
Preferred stock dividend rate
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Amortized Cost
Total available for sale (amortized cost)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table]
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Table]
Acquisition of bank and bank holding company, Common stock issued
Stock Issued
The amount of residual value associated with direct financing leases that are guaranteed by the lessees or others.
Capital Leases Net Investment In Direct Financing Leases Guaranteed Residual Values Of Leased Property
Guaranteed amount included in the estimated residual value of leased assets associated with direct financing leases
Cash and due from banks
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents
Federal state and local tax.
Federal State And Local Tax [Member]
Federal, State and Local Tax [Member]
Secured overnight financing rate plus basis points
Secured overnight financing rate plus basis points.
Schedule of Line of Credit Facilities [Table Text Block]
Lines of Credit Under Formal Agreements
Debt Instrument, Maturity Date Range, End
Debt Maturity, End Year
Document Information [Line Items]
Schedule of Maturities of Long-Term Debt [Table Text Block]
Maturity of Long-term Borrowings
Subsidiaries [Member]
Bank Subsidiaries [Member]
Gain (loss) on sale of subsidiary after-tax
Gain Loss On Sale Of Properties After Tax
Gain loss on sale of properties after tax
Entity Registrant Name
Entity Registrant Name
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax
Foreign currency translation adjustments
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Total
Liabilities, Fair Value Disclosure
Total liabilities
Cash and Cash Equivalents, at Carrying Value
Cash and cash equivalents at end of year
Cash and cash equivalents at beginning of year
Cash and cash equivalents
Cash and Cash Equivalents, at Carrying Value, Total
Financing Receivable, Impaired [Line Items]
Financing Receivable Impaired [Line Items]
Financing Receivable, Impaired [Line Items]
Deposits, Foreign
Deposits at Cayman Islands office
Deposits at foreign office
Deposits at Cayman Islands office
Deposits, Foreign, Total
Earnings Per Share [Text Block]
Earnings per common share
Class of Stock [Axis]
Class of Stock
US Government Agencies Debt Securities [Member]
Government Agency [Member]
Held to maturity (fair value: $12,375,420 at December 31, 2022; $2,771,290 at December 31, 2021)
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss
Amortized cost for held to maturity
Loss Contingency, Estimate of Possible Loss
Range of reasonably possible losses
Repayment of short-term borrowings assumed in acquisition
Repayment of short-term borrowings assumed in acquisition
Repayments of Short-Term Debt
Repayments of Short-Term Debt, Total
Mortgage-Backed Securities, Issued by Private Enterprises [Member]
Privately Issued [Member]
Privately Issued Mortgage-Backed Securities [Member]
Core Deposits [Member]
Core Deposit [Member]
Revenues
Revenues
Total income
Statement of Comprehensive Income [Abstract]
Property, Plant and Equipment, Net
Premises and equipment
Premises and equipment, net
Property, Plant and Equipment, Net, Beginning Balance
Property, Plant and Equipment, Net, Ending Balance
Defined Benefit Plan, Plan Assets, Prescription Drug Subsidy Receipt
Medicare Part D reimbursement
Award Type [Domain]
Award Type
Statement [Line Items]
Statement [Line Items]
Other Income
Other income
International Activities [Table]
International Activities [Table]
International Activities [Table]
Investment securities in continuous unrealized loss position.
Investment Securities In Continuous Unrealized Loss Position Table [Text Block]
Investment Securities in Continuous Unrealized Loss Position
OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, Tax
Unrealized holding gains (losses), net, tax
Carrying value of investment securities pledged related to repurchase transactions
Carrying Value of Investment Securities Pledged Related to Repurchase Transactions
Carrying value of investment securities pledged related to repurchase transactions..
Later years
Sales-Type and Direct Financing Leases, Lease Receivable, to be Received, after Year Five
2025
Derivative Notional Amount To Expire In Year Three
Derivative notional amount to expire in year three.
Title of 12(b) Security
Title of 12(b) Security
Finite-Lived Intangible Assets, Gross
Gross Carrying Amount
Finite-Lived Intangible Assets, Gross, Total
Current Income Tax Expense (Benefit), Continuing Operations [Abstract]
Current
Preferred stock
Preferred Equity
Preferred equity.
Loans and Leases Receivable, Gross, Carrying Amount [Abstract]
Loans and leases:
Fair value of collateralized mortgage obligations included in mortgage-backed securities.
Collateralized Mortgage Obligations Estimated Fair Value
Collateralized mortgage obligations, Estimated fair value
Common Stock [Member]
Common Stock [Member]
Derivative, Notional Amount
Notional Amount
Total
Notional amounts of derivative contracts entered into for trading account purposes
Interest Income (Expense), after Provision for Loan Loss
Net interest income after provision for credit losses
Allowance on acquired PCD loans
Allowance On Acquired Purchased Credit Deteriorated Loans
Allowance on acquired purchased credit deteriorated loans.
Other Real Estate, Foreclosed Assets, and Repossessed Assets
Amount of foreclosed residential real estate property held
Other Real Estate, Foreclosed Assets, and Repossessed Assets, Total
Net Cash Provided by (Used in) Operating Activities [Abstract]
Cash flows from operating activities
Banking Regulation, Tier 1 Leverage Capital, Actual
Amount
Marketing and Advertising Expense
Advertising and marketing
Marketing and Advertising Expense, Total
Equity Component [Domain]
Equity Component
Purchases of investment securities Available for sale
Payments to Acquire Debt Securities, Available-for-Sale
Derivative, Net Liability Position, Aggregate Fair Value
Net fair value of derivative financial instruments in a net liability position
Parent Company [Member]
M&T (Consolidated) [Member]
Parent Company [Member]
Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 10
Due after ten years
Income (loss) before taxes
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest
Income before taxes
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss
Held To Maturity Securities Continuous Unrealized Loss Position12 Months Or Longer Aggregate Losses
Banking Regulation, Total Capital, Actual
Amount
Entity Address, State or Province
Entity Address, State or Province
Deferred tax liabilities retirement benefits.
Deferred Tax Liabilities Retirement Benefits
Retirement benefits
Other consumer loans.
Other Consumer Loans [Member]
Other Consumer Loans [Member]
Geographical [Axis]
Geographical
Increase (decrease) in estimated fair value of interest rate contracts in liability position.
Increase Decrease In Estimated Fair Value Of Interest Rate Contracts In Liability Position
Reduction in estimated fair value of interest rate contracts in liability position
Loans and Leases Receivable, Allowance for Loan Losses Policy [Policy Text Block]
Allowance for credit losses
Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, Year One
Due in one year or less
Wilmington Trust N.A.
Wilmington Trust Na [Member]
Wilmington Trust, N.A. [Member]
Commercial loans and commercial real estate.
Commercial Loans And Commercial Real Estate [Member]
Commercial Loans and Commercial Real Estate [Member]
Derivative Instruments and Hedging Activities Disclosures [Table]
Derivative Instruments And Hedging Activities Disclosures [Table]
Derivative Instrument, Gain (Loss) Reclassified from AOCI into Income, Effective Portion, Statement of Income or Comprehensive Income [Extensible Enumeration]
The weighted average number of common shares outstanding (including common stock issuable) and unvested stock-based compensation awards.
Common Shares Outstanding Including Common Stock Issuable And Unvested Stock Based Compensation Awards
Common and unvested stock-based compensation awards
Common shares outstanding (including common stock issuable) and unvested stock-based compensation awards
Other comprehensive income loss reclassification adjustment for realized gains losses included in net income net of tax.
Other Comprehensive Income Loss Reclassification Adjustment For Realized Gains Losses Included In Net Income Net Of Tax
Gains (losses) realized in net income, net of tax
Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 10 Percent Adverse Change in Other Assumption
Impact on fair value of 10% adverse change
Document Type
Document Type
Interest Paid, Excluding Capitalized Interest, Operating Activities
Interest paid during the period
Summary of Acquisition, Pro Forma Information
Business Acquisition, Pro Forma Information [Table Text Block]
Other Comprehensive Income (Loss), before Reclassifications, before Tax
Total other comprehensive income (loss) before reclassifications, before tax
Deferred tax liability depreciation and amortization
Deferred Tax Liability Depreciation And Amortization
Depreciation and amortization
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications [Line Items]
Income taxes attributable to gains or losses on bank investment securities.
Income Taxes Attributable To Gains Or Losses On Bank Investment Securities
Income taxes attributable to gains or losses on bank investment securities
Cumulative effect on retained earnings tax.
Cumulative Effect On Retained Earnings Tax
Cumulative effect of change in accounting principle ?equity securities
Defined Benefit Plan, Amortization of Gain (Loss)
Recognized net actuarial (gain) loss
Receivables [Abstract]
Entity Shell Company
Entity Shell Company
Derivatives, Policy [Policy Text Block]
Derivative financial instruments
Net income loss available to common stockholders before unvested stock based compensation awards adjustment as used in the determination of diluted earnings per common share.
Net Income Loss Available To Common Stockholders Diluted Before Unvested Stock Based Compensation Awards Adjustment
Net income available to common equity
Fixed rate term loans of senior notes due two thousand twenty five.
Fixed Rate Term Loans Of Senior Notes Due Two Thousand Twenty Five [Member]
Fixed Rate Term Loans 2.90% Due 2025 [Member]
The carrying amount of investments in variable interest entity.
Investments In Variable Interest Entity Carrying Amount
Investment in partnership carrying amount
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, Prior Service Cost (Credit), before Tax
Net prior service cost (credit)
Other comprehensive income amortization of defined benefit plan actuarial loss recognized in net periodic benefit cost net of tax.
Other Comprehensive Income Amortization Of Defined Benefit Plan Actuarial Loss Recognized In Net Periodic Benefit Cost Net Of Tax
Amortization of actuarial losses, net of tax
Investments in trust preferred entities.
Investments In Trust Preferred Entities
Investments in trust preferred entities (note 20)
Collateral Held [Domain]
Collateral Held
Share-Based Payment Arrangement, Expense
Stock-based compensation expense
Investment Holdings [Line Items]
Investment Holdings [Line Items]
International mutual fund equity securities.
International Mutual Fund Equity Securities [Member]
International Mutual Fund Equity Securities [Member]
Segment Reporting Information [Line Items]
Segment Reporting Information [Line Items]
Interest Expense, Long-Term Debt
Long-term borrowings
Interest on long-term borrowings
Interest Expense, Long-term Debt, Total
Short-Term Debt [Member]
Short-term Borrowings [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Purchased impaired.
Purchased Impaired [Member]
Purchased Impaired [Member]
Mortgage Banking [Member]
Mortgage Banking Revenues [Member]
Dividends, Preferred Stock, Cash
Preferred stock cash dividends
Two independent pricing quotes.
Two Independent Pricing Quotes [Member]
Two Independent Pricing Quotes [Member]
Equity Securities, FV-NI, Current
Defined benefit plan effect of twenty five basis point decrease in rate of return on pension expense.
Defined Benefit Plan Effect Of Twenty Five Basis Point Decrease In Rate Of Return On Pension Expense
Effect of 25 basis point decrease in rate of return on pension expense
Class of Financing Receivable [Axis]
Class of Financing Receivable
Defined Benefit Plan, Benefit Obligation, Benefits Paid
Benefits paid
Fair Value, Recurring and Nonrecurring [Table]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table]
Sub servicing loan one.
Sub Servicing Loan One [Member]
Commercial Mortgage Sub Servicing Loan [Member]
Schedule of sale of subsidiary.
Schedule Of Sale Of Subsidiary [Abstract]
Fixed rate term loans of senior notes due two thousand nineteen one.
Fixed Rate Term Loans Of Senior Notes Due Two Thousand Nineteen One [Member]
Fixed Rate Term Loans 2.25% Due 2019 [Member]
Interest expenses savings and interest checking deposits.
Interest Expenses Savings And Interest Checking Deposits
Savings and interest-checking deposits
Defined Benefit Plan, Plan Assets, Benefits Paid
Benefits paid
Unrecognized tax benefits assumed in a business combination
Unrecognized Tax Benefits, Increase Resulting from Acquisition
Summary of loans in accrual and nonaccrual status.
Summary Of Loans In Accrual And Nonaccrual Status Table [Text Block]
Summary of loans in Accrual and Nonaccrual Status
Payments to Acquire Mortgage Servicing Rights (MSR)
Purchase price of servicing rights
Loss Contingencies [Line Items]
Loss Contingencies [Line Items]
Interest rate swap agreements used for interest rate risk management.
Interest Rate Swap Agreements Used For Interest Rate Risk Management
Interest rate swap agreements used for interest rate risk management
Offsetting [Abstract]
Servicing Asset at Amortized Cost [Table]
Servicing Assets At Amortized Value [Table]
Security Exchange Name
Security Exchange Name
Other comprehensive income loss reclassification adjustment for realized gains losses included in net income before tax.
Other Comprehensive Income Loss Reclassification Adjustment For Realized Gains Losses Included In Net Income Before Tax
Gains (losses) realized in net income
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, without Single Maturity Date
Mortgage-backed securities held to maturity
Goodwill and Intangible Assets, Policy [Policy Text Block]
Goodwill and core deposit and other intangible assets
Revenue from Contract with Customer [Abstract]
Class of Stock [Line Items]
Class Of Stock [Line Items]
Retail banking segment.
Retail Banking [Member]
Retail Banking [Member]
Servicing Asset at Amortized Cost [Table Text Block]
Servicing Asset at Amortized Cost
Taxable equivalent adjustment.
Taxable Equivalent Adjustment
Taxable-equivalent adjustment
Significant Accounting Policies [Text Block]
Significant accounting policies
Net Cash Provided by (Used in) Operating Activities
Net cash provided by operating activities
Debt Securities, Available-for-Sale, Maturity, without Single Maturity Date, Fair Value
Mortgage-backed securities available for sale
Deposits
Total deposits
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Change in benefit obligation:
Pledging Purpose [Domain]
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition
Unrecognized compensation cost expected to be recognized over a weighted-average period (in years)
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term
Weighted-Average Life (In Years), Outstanding, Ending balance
Tax cuts and jobs act of 2017 reclassification from AOCI to retained earnings.
Tax Cuts And Jobs Act Of2017 Reclassification From A O C I To Retained Earnings
Reclassification of income tax effects to retained earnings
Reclassification of income tax effects to retained earnings
Fair Value, by Balance Sheet Grouping [Table]
Fair Value By Balance Sheet Grouping [Table]
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]
Debt Instrument, Interest Rate, Effective Percentage
Variable interest rate of Senior Notes /Junior Subordinated Debentures
Amount of earnings on fees charged to merchants for the cardholder's use of a credit card and income earned from credit card services including late, over limit, and annual fees.
Merchant Discount And Credit Card Fees
Merchant discount and credit card fees
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Other comprehensive income (loss), net of tax and reclassification adjustments:
Loans Held-for-sale, Fair Value Disclosure
Real estate loans held for sale
Cash
Payments to Acquire Businesses, Gross
As of the balance sheet date of the net amount of unrealized pre-tax gains and losses from hedged loans, that are held for sale, commitments to originate loans for sale and commitments to sell loans, and that meet the criteria of being accounted for as derivative instruments.
Derivative Hedged Loans
Net unrealized pre-tax gains related to hedged loans held for sale, commitments to originate loans for sale and commitments to sell loans
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements
Settlements
Commitments and Contingencies Disclosure [Abstract]
Amount of accumulated unrealized loss on investments in debt and equity securities that have been in a continuous loss position for less than twelve months.
Investment Securities Continuous Unrealized Loss Position Less Than Twelve Months Aggregate Losses
Investment Securities Continuous Unrealized Loss Position Less Than Twelve Months Aggregate Losses
Equity and other securities at cost.
Equity And Other Securities At Cost
Equity and other securities, cost
Equity and other securities, Amortized Cost
Interest-Bearing Deposits in Banks and Other Financial Institutions
Interest-bearing deposits at banks
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Gain
Gross unrealized gains for held to maturity
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total gains realized/unrealized:
Operating Lease, Cost
Operating lease cost
Dividends performance share units.
Dividends Performance Share Units
Performance share unit dividends
Restricted Stock Units (RSUs) [Member]
Restricted Stock Units (RSUs) [Member]
The notional amount of interest rate swap agreements entered into for risk management purposes that mature during the second year after the balance sheet date.
Derivative Notional Amount To Expire In Year Two
2023
Deposit Account [Member]
Service Charges on Deposit Accounts [Member]
Lessee, Operating Lease, Liability, Maturity [Table Text Block]
Summary of Minimum Lease Payments Under Noncancelable Operating Leases
Maximum percentage of qualified compensation that eligible employees may contribute to the defined contribution plan.
Percentage Of Eligible Employees Contribution For Retirement Savings Plan
Percentage of eligible employees contribution for Retirement Savings Plan
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate
Discount rate
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]
Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits
Schedule of Accounts, Notes, Loans and Financing Receivable [Table]
Schedule Of Accounts Notes Loans And Financing Receivable [Table]
CAYMAN ISLANDS
Cayman Islands [Member]
Effective Income Tax Rate Reconciliation, Tax Credit, Amount
Qualified affordable housing project tax credits, net
Effective Income Tax Rate Reconciliation, Tax Credit, Amount, Total
Consolidation, Policy [Policy Text Block]
Consolidation
Leveraged Leases, Net Investment in Leveraged Leases Disclosure, Rental Receivables, Net
Lease payments receivable
Leveraged Leases, Net Investment in Leveraged Leases Disclosure, Rental Receivables, Net, Total
Investments in and Advances to Affiliates, Dividend or Interest Credited to Income
Dividends from consolidated subsidiaries
Defined benefit plan assumptions used calculating net periodic benefit sensitivity rate increase decrease discount rate.
Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Sensitivity Rate Increase Decrease Discount Rate
Assumptions used calculating net periodic benefit sensitivity rate increase decrease discount rate
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance
Amortized Cost without Allowance
Total revenues
Business Acquisition, Pro Forma Revenue
Total identifiable assets acquired
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets
Assets
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)
Actuarial (gain) loss
Liabilities and preferred stock:
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities [Abstract]
Receivable [Policy Text Block]
Loans and leases
Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 10 Percent Adverse Change in Prepayment Speed
Impact on fair value of 10% adverse change
Schedule of Defined Benefit Plans Disclosures [Table]
Schedule Of Defined Benefit Plans Disclosures [Table]
Business Acquisition [Line Items]
Business Acquisition [Line Items]
Financing Receivable, Modifications, Number of Contracts
Number of modifications
Debt Disclosure [Text Block]
Borrowings
Fair Value, Inputs, Level 2 [Member]
Significant Observable Inputs (Level 2) [Member]
Proceeds from Issuance of Long-Term Debt
Proceeds from long-term borrowings
Proceeds from Issuance of Long-term Debt, Total
Available for sale (cost: $11,193,152 at December 31, 2022; $3,849,347 at December 31, 2021)
Debt Securities, Available-for-Sale
Total
Investment securities available for sale, estimated fair value
Net Cash Provided by (Used in) Investing Activities [Abstract]
Cash flows from investing activities
The adjustment to common stock or additional paid in capital for the amount of recognized equity-based compensation during the period.
Share Based Compensation Expense Net
Stock-based compensation transactions, net
Deferred tax assets operating lease liabilities.
Deferred Tax Assets Operating Lease Liabilities
Operating lease liabilities
Summary of Estimated Amortization Expense
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]
Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions
Increases as a result of tax positions taken during the period
Equity securities gross unrealized losses.
Equity Securities Gross Unrealized Losses
Equity securities, Gross Unrealized Losses
Investments
Total investment securities
Investment securities
Net assets acquired
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net
Interest Paid, Including Capitalized Interest, Operating and Investing Activities
Interest paid during the year
Interest Paid, Including Capitalized Interest, Operating and Investing Activities, Total
Maturity Period Three [Member].
Maturity Period Three [Member]
Maturity Period 2023 [Member]
Common Stock, Shares, Issued
Common stock, shares issued
Common Stock, Shares, Issued, Total
B or Less credit rating.
B Or Less Credit Rating [Member]
B or Less [Member]
Derivative Instruments and Hedging Activities Disclosure [Text Block]
Derivative financial instruments
Liabilities [Abstract]
Liabilities
Consideration:
Business combination purchase price [Abstract]
Business combination purchase price.
Investments in other nonbank, nonbank holding subsidiaries that are consolidated in the financial statements.
Investments In Consolidated Other Subsidiaries
Other
Trading Activity [Axis]
Trading Activity
Servicing Asset at Amortized Cost, Fair Value
Ending balance, net
Noninterest Income, Other Operating Income
Other revenues from operations
Variable Rate [Domain]
Variable Rate
Unrealized gain (losses) on cash flow hedges net of tax
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax
Interest Income [Member]
Interest Income [Member]
Postretirement and other employee benefits
Deferred Tax Liabilities Tax Deferred Expense Compensation and Benefits Postretirement and Other Employee Benefits
Deferred tax liabilities tax deferred expense compensation and benefits postretirement and other employee benefits.
Residential limited documentation.
Residential Limited Documentation [Member]
Residential Limited Documentation [Member]
Minimum [Member]
Minimum [Member]
Hedging Designation [Axis]
Hedging Designation
Subordinated notes due two zero two seven.
Subordinated Notes Due Two Zero Two Seven [Member]
3.40% due 2027 [Member]
Amount of deferred tax liability attributable to taxable temporary differences from unrealized gains on investment securities.
Deferred Tax Liabilities Unrealized Gains On Investment Securities
Unrealized gains
Interest Income, Domestic Deposits
Deposits at banks
Interest Income, Domestic Deposits, Total
Aggregate amount of interest paid or due and all noninterest expense.
Interest And Noninterest Expenses Attributable To Parent
Total expense
Segments [Domain]
Segments
Buildings and Improvements, Gross
Buildings
Buildings and Improvements, Gross, Total
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax
Foreign currency translation adjustment, tax
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax, Total
Loans and Leases Receivable, Net Amount
Loans to foreign borrowers
Loans and leases, net
Federal Funds Purchased [Member]
Federal Funds Purchased and Repurchase Agreements [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price
Weighted-Average Exercise Price, Exercisable
Accounting Standards Update [Axis]
Accounting Standards Update
Allowance for credit losses at acquisition
Allowance for credit losses at acquisition
Impaired Financing Receivable, Related Allowance
Amortized Cost
Other Comprehensive Income (Loss) before Reclassifications, Tax
Total other comprehensive income (loss) before reclassifications, tax
Net Cash Provided by (Used in) Financing Activities, Continuing Operations
Net cash used by financing activities
Stockholders' Equity Attributable to Parent [Abstract]
Shareholders' equity
Treasury Stock [Member]
Treasury Stock [Member]
Schedule of Stock by Class [Table Text Block]
Issued and Outstanding Preferred Stock
Other Intangible Assets [Member]
Other [Member]
Segments [Axis]
Segments
Commitments to extend credit for other commercial real estate.
Commitments To Extend Credit For Other Commercial Real Estate
Other commercial real estate
Historical recovery rate of collateral values of consumer installment loans.
Historical Recovery Rate Of Collateral Values Of Consumer Installment Loans
Historical recovery rate of collateral values of consumer installment loans
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)
Actual return on plan assets
Debt Instrument, Maturity Date Range, Start
Debt Maturity, Start Year
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value
Weighted-Average Grant Price, Cancelled
Commercial real estate excluding residential builder and developer and other construction.
Commercial Real Estate Excluding Residential Builder And Developer And Other Construction [Member]
Commercial [Member]
Amortization of Intangible Assets
Amortization of core deposit and other intangible assets
Amortization of Intangible Assets, Total
Award Type [Axis]
Award Type
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount
Unrecognized compensation cost related to non-vested awards
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total
Total consideration
Business Combination, Consideration Transferred
Ratio
Capital To Risk Weighted Assets Ratio
Capital to risk weighted assets ratio.
Noninterest Income [Abstract]
Other income
Income
Deferred Tax Assets, Gross
Gross deferred tax assets
Loss Contingencies [Table]
Loss Contingencies [Table]
Loans and Leases receivable.
Loans And Leases Receivable [Table]
Loans And Leases Receivable [Table]
Syndicated loan facility.
Syndicated Loan Facility [Member]
Syndicated Loan Facility [Member]
Interest Expense [Abstract]
Interest expense
Restricted Stock Awards [Member]
Restricted Stock Awards [Member]
Restricted Stock Awards [Member]
Class of Financing Receivable [Domain]
Class of Financing Receivable
2024
Defined Benefit Plan, Expected Future Benefit Payment, Year Two
Commitments regarding financial guarantees and indemnification contracts.
Commitments Regarding Financial Guarantees And Indemnification Contracts
Financial guarantees and indemnification contracts
Capital conservation buffer ratio.
Capital Conservation Buffer Ratio
Capital conservation buffer
Goodwill and other intangible assets.
Goodwill And Other Intangible Assets [Line Items]
Goodwill And Other Intangible Assets [Line Items]
Other assets for its "investment" in the common securities recognized by the company of various trusts.
Other Assets For Its Investment In Common Securities Recognized By Company Of Various Trusts
Other assets for its "investment" in the common securities recognized by the company of various trusts
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Loan Type [Axis]
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Loan Type
Lessee, Operating Lease, Liability, to be Paid
Total lease payments
Fixed rate three point five five percentage due two thousand twenty three.
Fixed Rate Three Point Five Five Percentage Due Two Thousand Twenty Three [Member]
3.55% Fixed Rate Due 2023 [Member]
Defined Benefit Plan, Plan Assets, Contributions by Plan Participant
Plan participants’ contributions
Debt security.
Debt Security [Member]
Total Debt Securities [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Period Increase (Decrease)
Changes in unrealized gains included in earnings related to assets still held at end of period
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Period Increase (Decrease), Total
M&T Insurance Agency, Inc [Member]
M&T Insurance Agency, Inc.
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions
Decreases as a result of tax positions taken in prior years
Floating rate senior notes.
Floating Rate Senior Notes [Member]
Variable Rate Senior Notes [Member]
Revolving loans converted to term loans.
Revolving Loans Converted To Term Loans [Member]
Revolving Loans Converted to Term Loans [Member]
Residential Real Estate [Member]
Residential Real Estate [Member]
Loans and leases receivable.
Loans And Leases Receivable [Line Items]
Loans And Leases Receivable [Line Items]
Cost method equity securities
Equity Securities, FV-NI, Cost
Entity Central Index Key
Entity Central Index Key
Capital Leases, Net Investment in Direct Financing Leases [Abstract]
Direct financings:
Other Income and Expenses [Abstract]
Other Income and Expenses [Abstract]
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, after Tax
Current year benefit plans gains (losses) , net of tax
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, after Tax, Total
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets [Line Items]
Interest and Dividend Income, Operating
Total interest income
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage
Percentage of common stock in total plan assets
Accounting Policies [Abstract]
Investment Holdings [Table]
Investment Holdings [Table]
Investments, Debt and Equity Securities [Abstract]
Weighted Average Number of Shares Outstanding, Basic [Abstract]
Weighted-average shares outstanding:
High yielding bonds.
High Yielding Bonds [Member]
High-Yielding Bonds [Member]
Debt Instrument, Redemption, Period [Axis]
Debt Instrument, Redemption, Period
Disaggregation of Revenue [Line Items]
Disaggregation Of Revenue [Line Items]
Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust
Junior subordinated debentures associated with preferred capital securities
Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust, Total
M&T Bank.
M And T Bank [Member]
M&T Bank [Member]
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment
Less: accumulated depreciation and amortization
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Total
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Beginning Balance
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Ending Balance
Property, Plant and Equipment [Table]
Schedule Of Property Plant And Equipment [Table]
Hedging Designation [Domain]
Hedging Designation
Term Loans 2022 [Member]
Long Term Debt Two Thousand Twenty Two [Member]
Long term debt two thousand twenty two.
Schedule of Future Minimum Lease Payments for Capital Leases [Table Text Block]
Minimum Future Lease Payments to be Received from Lease Financings
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date
Loans and Leases Receivable, Deferred Income
Unearned discount
Loans and Leases Receivable, Deferred Income, Total
Investment in direct financings
Direct Financing Lease, Net Investment in Lease, before Allowance for Credit Loss
Measurement Frequency [Axis]
Measurement Frequency
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss
Held To Maturity Securities Continuous Unrealized Loss Position Less Than12 Months Aggregate Losses
Debt Securities, Available-for-Sale, Fair Value, Fiscal Year Maturity [Abstract]
Debt securities available for sale:
Consolidation Items [Domain]
Consolidation Items
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant
Shares under equity incentive compensation plan for future grant
Debt instrument maturity year.
Debt Instrument Maturity Year
Debt maturity date
Net change in trading account and non-hedging derivative assets and liabilities
Increase (Decrease) in Financial Instruments Used in Operating Activities
Increase (Decrease) in Financial Instruments Used in Operating Activities, Total
Share-Based Payment Arrangement [Text Block]
Stock-based compensation plans
AOCI Including Portion Attributable to Noncontrolling Interest, before Tax
Ending balance, before tax
Beginning balance, before tax
Net investment in direct financing and leveraged type leases.
Net Investment In Direct Financing And Leveraged Type Leases
Total investment in leases
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible Enumeration]
Schedule of Equity Method Investments [Table]
Schedule Of Equity Method Investments [Table]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price
Weighted-Average Exercise Price, Outstanding, Ending balance
Weighted-Average Exercise Price, Outstanding, Beginning balance
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, Year One
Due in one year or less
Condensed Financial Information of Parent Company Only Disclosure [Text Block]
Parent company financial statements
Amount after tax of increase (decrease) in accumulated other comprehensive income (loss) related to the reclassification adjustment for other than temporary impairment (OTTI) related to factors other than credit loss on a previously impaired investment on held-to-maturity security.
Other Comprehensive Income Unrealized Holding Gain Loss On Held To Maturity Securities Arising During Period Net Of Tax
Amortization of unrealized holding losses on held-to-maturity securities
Fair Value, Nonrecurring [Member]
Fair Value, Measurements, Nonrecurring [Member]
Entities [Table]
Net (increase) decrease in loan servicing advances
The net cash outflow or inflow for the increase (decrease) of loan servicing advances.
Net Increase Decrease In Loan Servicing Advances
Noninterest income (expense), other operating income (loss).
Noninterest Income Expense Other Operating Income Loss
Other
Statement of Partners' Capital [Abstract]
Weighted average option adjusted spread over market implied forward London interbank offered rates used to determine discount rate.
Weighted Average Option Adjusted Spread Over Market Implied Forward London Interbank Offered Rates Used To Determine Discount Rate
Weighted-average OAS
Investment in debt securities amortized cost.
Investment In Debt Securities Amortized Cost
Total debt securities Amortized cost
Lease, Cost
Total lease cost
Variable rate subordinated notes due two thousand and twenty.
Variable Rate Subordinated Notes Due Two Thousand And Twenty [Member]
Variable Rate Subordinated Notes Due Two Thousand And Twenty
Short-Term Debt, Weighted Average Interest Rate, at Point in Time
Weighted-average interest rate
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability
Additions to right-of-use assets under operating leases
Right-of-use assets obtained in exchange for new operating lease liabilities
Balance of acquired loans that were not purchased impaired.
Other Acquired Loans [Member]
Other Acquired [Member]
Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]
Adjustments to reconcile net income to net cash provided by operating activities
Retained Earnings [Member]
Retained Earnings [Member]
Maturity Period One [Member].
Maturity Period One [Member]
Maturity Period 2021 [Member]
Extinguishment of Debt, Type [Domain]
Extinguishment of Debt, Type
Recreational finance.
Recreational Finance [Member]
Recreational Finance [Member]
Internal Credit Assessment [Axis]
Internal Credit Assessment
The amount of income tax related to the net gain (loss), prior service cost (credit), and transition assets (obligations), as well as minimum pension liability if still remaining, included in accumulated other comprehensive income associated with a defined benefit pension or other postretirement plan(s) because they have yet to be recognized as components of net periodic benefit cost.
Defined Benefit Plan Accumulated Other Comprehensive Income Tax
Taxes
Income (Loss) from Equity Method Investments
Income (loss) from equity method investments
Income (Loss) from Equity Method Investments, Total
Other short term borrowings.
Other Short Term Borrowings [Member]
Other Short-term Borrowings [Member]
Financing receivable recorded investment accrual or nonaccrual status.
Financing Receivable Recorded Investment Accrual Or Nonaccrual Status
Amount of real estate loan as reported as accruing or nonaccruing
Investment securities pledged to secure debt carrying value
Carrying Value Of Investment Securities Pledged
Carrying value of investment securities pledged.
Interest on loans
Deferred Tax Asset Interest on Loans
Deferred tax asset interest on loans.
Common shares issued, Shares
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares
Designated as Hedging Instrument [Member]
Derivatives Designated and Qualifying as Hedging Instruments [Member]
Segment Reporting [Abstract]
Geographic Distribution [Domain]
Geographic Distribution
Schedule of Goodwill [Table]
Schedule Of Goodwill [Table]
Other Expenses [Abstract]
Other expense:
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Land
Land
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable
Business combination, market value
Treasury Stock, Common, Shares
Treasury stock, common shares
Property, Plant and Equipment, Gross
Premises and equipment, gross
Property, Plant and Equipment, Gross, Beginning Balance
Property, Plant and Equipment, Gross, Ending Balance
2022 Transactions
Goodwill, Acquired During Period
Long-Term Debt, Maturity, after Year Five
Later years
Loans and leases receivable net of deferred income by accrual status.
Loans And Leases Receivable Net Of Deferred Income By Accrual Status Table [Text Block]
Summary of Current, Past Due and Nonaccrual Loans
Allowance for Credit Losses [Text Block]
Allowance for credit losses
Defined benefit plan effect of twenty five basis point increase in rate of return on pension expense.
Defined Benefit Plan Effect Of Twenty Five Basis Point Increase In Rate Of Return On Pension Expense
Effect of 25 basis point increase in rate of return on pension expense
Fixed rate term loans of senior notes due two thousand twenty one.
Fixed Rate Term Loans Of Senior Notes Due Two Thousand Twenty One [Member]
Fixed Rate Term Loans 2.625% Due 2021 [Member]
Additional Paid in Capital
Additional paid-in capital
Additional Paid in Capital, Total
Additional Paid in Capital, Beginning Balance
Additional Paid in Capital, Ending Balance
Entity Interactive Data Current
Entity Interactive Data Current
Short-Term Debt, Maximum Month-end Outstanding Amount
Highest amount at a month-end
Entity Public Float
Entity Public Float
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Financial assets:
Financial Asset, Aging [Domain]
Financial Asset, Aging
Commercial Real Estate [Member]
Commercial Real Estate [Member]
Defined Benefit Plan, Real Estate [Member]
Other Real Estate Partnerships [Member]
Commitments to sell real estate loans notional amount.
Commitments To Sell Real Estate Loans Notional Amount
Commitments to sell real estate loans
Federal Funds Sold
Federal funds sold
Letters of Credit Outstanding, Amount
Standby letters of credit
Schedule of available for sale securities and held to maturity.
Schedule Of Available For Sale Securities And Held To Maturity [Table]
Schedule Of Available For Sale Securities And Held To Maturity [Table]
Intersegment Eliminations [Member]
Intersegment Activity Eliminated in Consolidated Totals [Member]
Banking Regulation, Tier 1 Risk-Based Capital Ratio, Actual
Tier 1 capital to risk-weighted assets, Minimum
Ratio
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Supplemental schedule of noncash investing and financing activities
Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 10
Due after ten years
Preferred Stock, Redemption Date
Preferred shares redemption date
Carrying value of available for sale securities pledged.
Carrying Value Of Available For Sale Securities Pledged
Investment securities pledged to secure debt carrying value
Loans receivable.
Loans Receivable [Abstract]
Loans
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-Term Rate of Return on Plan Assets
Long-term rate of return on plan assets
Schedule of Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets [Table]
Sensitivity Analysis Of Fair Value Of Interests Continued To Be Held By Transferor Servicing Assets Or Liabilities [Table]
Banking Regulation, Tier 1 Leverage Capital Ratio, Well Capitalized, Minimum
Leverage - Tier 1 capital to average total assets, as defined
Home equity lines and loans.
Home Equity Lines And Loans [Member]
Home Equity Lines and Loans [Member]
Counterparties.
Counterparties [Member]
Counterparties [Member]
Credit risk derivative.
Credit Risk Derivative [Member]
Credit Risk Derivative [Member]
Common equity tier one risk based capital to well capitalized to risk weighted assets.
Common Equity Tier One Risk Based Capital To Well Capitalized To Risk Weighted Assets
Common equity Tier 1 ("CET1") to risk-weighted assets, Well Capitalized
Payments for (Proceeds from) Productive Assets
Capital expenditures, net
Payments for (Proceeds from) Productive Assets, Total
Southern Financial Statutory Trust I - 10.60%, due 2030.
Southern Financial Statutory Trust One Fixed Rates Due Two Zero Three Zero [Member]
Southern Financial Statutory Trust I - 10.60%, due 2030 [Member]
Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract]
Deferred
Other lease cost information.
Other Lease Cost Information [Abstract]
Other information
Defined benefit plan decrease of twenty five basis point increase in discount rate on benefit obligation.
Defined Benefit Plan Decrease Of Twenty Five Basis Point Increase In Discount Rate On Benefit Obligation
Effect of 25 basis point increase in discount rate on benefit obligation
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer
Estimated fair value, 12 months or more
ACL for non-PCD loan and leases
A C L for non-purchased credit deteriorated loan and leases
ACL for non-purchased credit deteriorated loan and leases.
Local Phone Number
Local Phone Number
Unrecognized Tax Benefits
Ending Balance
Beginning Balance
BSB Capital Trust I - 8.125%, due 2028.
Bsb Capital Trust One Fixed Rates Due Two Zero Two Eight [Member]
BSB Capital Trust I - 8.125%, due 2028 [Member]
Allfirst Asset Trust - due 2029.
Allfirst Asset Trust Variable Rates Due Two Zero Two Nine [Member]
Allfirst Asset Trust - due 2029 [Member]
Summary of Identifiable Assets Acquired, Liabilities Assumed and Preferred Stock Exchanged as of Acquisition
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]
Director and certain officers.
Director And Certain Officers [Member]
Director and Certain Officers [Member]
Long-Term Debt [Member]
Long-term Debt [Member]
Payments for (Proceeds from) Loans and Leases
Net (increase) decrease in loans and leases
Payments for (Proceeds from) Loans and Leases, Total
Commercial banking segment.
Commercial Banking [Member]
Commercial Banking [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period
Vesting period
Defined Benefit Plan, Benefit Obligation
Benefit obligation at end of year
Benefit obligation at beginning of year
Projected benefit obligation
Debt Disclosure [Abstract]
Other comprehensive income amortization of defined benefit plan actuarial loss recognized in net periodic benefit cost tax effect.
Other Comprehensive Income Amortization Of Defined Benefit Plan Actuarial Loss Recognized In Net Periodic Benefit Cost Tax Effect
Amortization of actuarial losses, tax
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Derivative Liability, Fair Value of Collateral
Post collateral requirements relating to positions
Summary of Unpaid Principal Balance to Fair Value of Loans and Leases by Portfolio Segment
Impaired Financing Receivables [Table Text Block]
Discretionary portfolio segment.
Discretionary Portfolio [Member]
Discretionary Portfolio [Member]
Interest Rate Swap [Member]
Interest Rate Swap Agreements [Member]
Effective Income Tax Rate Reconciliation, Tax Exempt Income, Amount
Tax-exempt income
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number
Stock Options Outstanding, Exercisable
Proceeds from issuance of Series I preferred stock
Proceeds from Issuance of Preferred Stock and Preference Stock
Proceeds from issuance of Series I and G preferred stock
Consolidated Entities [Axis]
Consolidated Entities
Income attributable to unvested stock based compensation awards. This amount is used as a reduction to net income available to common equity in the calculation of net income available to common shareholders as used in the determination of diluted earnings per share.
Income Attributable To Unvested Stock Based Compensation Awards Diluted
Less: Income attributable to unvested stock-based compensation awards
Commitments to sell real estate loans.
Commitments To Sell Real Estate Loans [Member]
Commitments to Sell Real Estate Loans [Member]
2026
Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Four
Derivative Asset, Fair Value of Collateral
Collateral relating to net asset positions
Disaggregation of Revenue [Table Text Block]
Summary of Sources of Noninterest Income that are Subject to Revenue Recognition Guidance
Common stock awards converted
Stock Issued During Period, Value, Conversion of Units
Other securities.
Other Securities [Member]
Other Securities [Member]
Due from Related Parties, Unclassified [Abstract]
Due from consolidated bank subsidiaries
2027
Defined Benefit Plan, Expected Future Benefit Payment, Year Five
First Maryland Capital II - due 2027.
First Maryland Capital Two Variable Rates Due Two Zero Two Seven [Member]
First Maryland Capital II - due 2027 [Member]
Credit Derivatives [Line Items]
Credit Derivatives [Line Items]
Financing Receivable, Allowance for Credit Loss, Recovery
Recoveries
Income Statement Location [Domain]
Income Statement Location
Right-of-use assets acquired in business combination
Right-of-use assets acquired in business combination
Right-of-use assets acquired in business combination.
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Expirations in Period
Stock Options Outstanding, Expired
Lessee, Operating Lease, Liability, Payments, Due after Rolling Year Five
Later years
2023
Long-Term Debt, Maturity, Year One
Junior Subordinated Debt [Member]
Junior Subordinated Debt [Member]
Total liabilities assumed
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities
The period of delinquency threshold for consumer loans that generally results in the loan being charged off.
Consumer Loan Delinquent Period Threshold For Consideration For Charge Off
Consumer loan delinquent period threshold for consideration for charge off
Treasury Stock, Value, Acquired, Cost Method
Purchases of treasury stock
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment [Abstract]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number
Restricted Stock Outstanding, Unvested, Ending balance
Restricted Stock Outstanding, Unvested, Beginning balance
Debt Securities, Held-to-Maturity, Maturity, without Single Maturity Date, Fair Value
Mortgage-backed securities held to maturity
M and T equity securities.
M And T Equity Securities [Member]
M&T Equity Securities [Member]
Other comprehensive income loss net yield adjustment from cash flow hedges, net of tax.
Other Comprehensive Income Loss Net Yield Adjustment From Cash Flow Hedges Net Of Tax
Net yield adjustment from cash flow hedges currently in effect, net of tax
Amount of noninterest income net of other-than-temporary impairment of marketable securities.
Noninterest Income Expense
Noninterest income
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities
Decreases as a result of settlements with taxing authorities
Long-Term Debt
Long-term borrowings
Long-term borrowings
Loan facility carrying amount
Long-term borrowings
Equity securities gross unrealized gains.
Equity Securities Gross Unrealized Gains
Equity securities, Gross Unrealized Gains
Mortgage loans serviced for others.
Mortgage Loans Serviced For Others
Mortgage loans serviced for others
Line of Credit Facility, Remaining Borrowing Capacity
Unused
Collateralized Debt Obligations [Member]
Collateralized Debt Obligations [Member]
Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table]
Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table]
Text Block [Abstract]
Assumed in business combination
Business Combination, Recognized Identifiable Asset Acquired and Liability Assumed, Lease Obligation
Other Comprehensive Income (Loss), before Tax
Total other comprehensive income (loss), before tax
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number
Stock Options Outstanding, Ending balance
Stock Options Outstanding, Beginning balance
4.00% due 2024 [Member]
Subordinated Notes Due Two Zero Two Four [Member]
Subordinated notes due two zero two four.
Maximum exposure to loss of investments in real estate partnerships.
Maximum Exposure To Loss Of Investments In Real Estate Partnerships
Maximum exposure to loss of investments in real estate partnerships
Document Fiscal Year Focus
Document Fiscal Year Focus
Interest-bearing deposits at banks
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed Assets Bearing Deposits at Banks and Other Short-term Investments
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed Assets Bearing Deposits at Banks and Other Short-term Investments
A or Better credit rating.
A Or Better Credit Rating [Member]
A or Better [Member]
Decrease in goodwill
Goodwill, Period Increase (Decrease)
Goodwill, Period Increase (Decrease), Total
Common stock issuable.
Common Stock Issuable [Member]
Common Stock Issuable [Member]
Financing Receivable Portfolio Segment [Axis]
Financing Receivable Portfolio Segment
Earnings Per Share, Basic
Basic
Basic earnings per common share
Earnings Per Share, Basic, Total
Defined benefit plan period for applying ultimate health care cost trend rate.
Defined Benefit Plan Period For Applying Ultimate Health Care Cost Trend Rate
Period for decreasing the annual rate
Defined benefit plans accumulated other comprehensive income minimum pension liability before tax.
Defined Benefit Plans Accumulated Other Comprehensive Income Minimum Pension Liability Before Tax
Minimum pension liability
Condensed Financial Information Disclosure [Abstract]
Loans and Leases Receivable, Related Parties, Description
Exclusion limit of loans from related party disclosure
Property plant and equipment capitalized interest costs.
Property Plant And Equipment Capitalized Interest Costs [Abstract]
Estimated residual value of leased assets
Direct Financing Lease, Unguaranteed Residual Asset
Dividends, Common Stock, Cash
Common stock cash dividends
Other loans.
Other Loans [Member]
Other [Member]
Noncancelable operating lease period in years.
Noncancelable Operating Lease Period
Period of noncancelable operating lease in years
Assets [Abstract]
Assets
International activities.
International Activities [Abstract]
Leveraged Leases, Net Investment in Leveraged Leases Disclosure, Deferred Taxes Arising from Leveraged Leases
Deferred taxes payable arising from leveraged leases
Deferred Tax Assets, Net
Net deferred tax asset
Number of shares related to unvested stock-based compensation awards. This amount is a reduction in the calculation of weighted average shares outstanding for the earnings per share calculation.
Unvested Stock Based Compensation Awards
Less: Unvested stock-based compensation awards
Outstanding principal balance of sub-serviced residential real estate loans for a privately-held specialty mortgage finance company.
Sub Serviced Residential Mortgage Loans Of Privately Held Company
Outstanding principal balances of residential mortgage loans from Bayview Financial
Other cost of operations
Other cost of operations.
Cash Flow Hedges Derivative Instruments at Fair Value, Net
Cash flow hedges drerivative instruments income
Cash Flow Hedges Derivative Instruments at Fair Value, Net, Total
PCD
PCD Acquired Loans [Member]
PCD Acquired Loans Member
PCD acquired loans.
Defined Benefit Plan, Equity Securities [Member]
Equity Securities [Member]
Schedule of Long-Term Debt Instruments [Table Text Block]
Long-term Borrowings
Treasury stock - common, at cost - 10,165,419 shares at December 31, 2022; 31,052,845 shares at December 31, 2021
Treasury Stock, Value
Treasury Stock, Value, Total
Treasury Stock, Value, Beginning Balance
Treasury Stock, Value, Ending Balance
Investment securities
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Investment securities
Business combination recognized identifiable assets acquired and liabilities assumed investment securities.
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Interest Rate at Period End
Variable contractual interest rate of long-term debt
Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount
Other
Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount, Total
Assumed weighted-average rates used to determine net benefit expense.
Assumed Weighted Average Rates Used To Determine Net Benefit Expense Table [Text Block]
Assumed Weighted-Average Rates Used to Determine Net Benefit Expense
2025
Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Three
Core Deposit and Other Intangible Assets [Member]
Core Deposit And Other Intangible Assets Member
Core deposit and other intangible assets.
Financial Instrument [Axis]
Financial Instrument
Other Noninterest Expense
Other costs of operations
Residential builder and developer.
Residential Builder And Developer [Member]
Residential Builder and Developer [Member]
Weighted Average Grant Price, Assumed in business combination
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments OtherThan Options Assumed In Business Combinations Weighted Average Grant Date Fair Value
Share based compensation arrangement by share based payment award equity instruments other than Options Assumed In Business Combinations Weighted Average Grant Date Fair Value
Commitments to originate real estate loans for sale.
Commitments To Originate Real Estate Loans For Sale
Commitments to originate real estate loans for sale
Long-Lived Tangible Asset [Axis]
Long-Lived Tangible Asset
Concentration Risk Benchmark [Axis]
Concentration Risk Benchmark
Provision for Loan and Lease Losses
Provision for credit losses
Provision for Loan and Lease Losses, Total
Amortized cost and estimated fair value of debt securities by contractual maturity.
Amortized Cost And Estimated Fair Value Of Debt Securities By Contractual Maturity Table [Text Block]
Amortized Cost and Estimated Fair Value of Debt Securities by Contractual Maturity
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Principal Amount of Delinquent Loans
FHA gauranteed purchase amount of deliquent loan
Pledged financial instruments
Financing Receivable, after Allowance for Credit Loss
Financing Receivable, after Allowance for Credit Loss, Total
Income Taxes Paid, Net
Income taxes paid during the period
Income taxes received during the year
Income Taxes Paid, Net, Total
Schedule of Interest Rate Derivatives [Table Text Block]
Information about Interest Rate Swap Agreements
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Property, Plant and Equipment, Policy [Policy Text Block]
Premises and equipment
Total loans
Financing Receivable, before Allowance for Credit Loss
Total loans
Loans and Leases Receivable, Related Parties, Proceeds
Repayments and other reductions of borrowings by directors, certain officers and their associates
Internal Credit Assessment [Domain]
Internal Credit Assessment
Available-for-Sale Securities [Member]
Available-for-Sale Securities [Member]
Income Tax Authority [Axis]
Income Tax Authority
Valuation Approach and Technique [Axis]
Valuation Approach and Technique
Preferred Stock [Member]
Preferred Stock [Member]
Commitments to extend credit for residential real estate loans to be sold.
Commitments To Extend Credit For Residential Real Estate Loans To Be Sold
Residential real estate loans to be sold
2026
Finite-Lived Intangible Asset, Expected Amortization, Year Four
Deferred Compensation Arrangement with Individual, Shares Authorized for Issuance
Shares issuable under deferred compensation plans
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax
Total other comprehensive income (loss) before reclassifications, net of tax
Federal Funds Purchased and Securities Sold under Agreements to Repurchase
Federal Funds Purchased and Repurchase Agreements
Short-term borrowings
Federal Funds Purchased and Securities Sold under Agreements to Repurchase, Total
Clearinghouse credit facilities.
Clearinghouse Credit Facilities [Member]
Clearinghouse Credit Facilities [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Summary of changes in Accretable Yield for acquired loans
2024
Finite-Lived Intangible Asset, Expected Amortization, Year Two
Outstanding nonredeemable series I preferred stock or outstanding series I preferred stock. Classified within stockholders' equity if nonredeemable or redeemable solely at the option of the issuer. Classified within temporary equity if redemption is outside the control of the issuer.
Series I Preferred Stock [Member]
Series I Preferred Stock [Member]
The average notional amounts of interest rate swap agreement impacting net interest income that were entered into for interest rate risk management purposes.
Average Notional Amount Of Interest Rate Fair Value Hedge Derivatives
Average notional amounts of interest rate swap agreements impacting net interest income, contract entered into for interest rate risk management purposes
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Loan Type [Domain]
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Loan Type
Schedule of available for sale securities and held to maturity.
Schedule Of Available For Sale Securities And Held To Maturity [Line Items]
Schedule Of Available For Sale Securities And Held To Maturity [Line Items]
Noninterest Income
Total other income
Segment Reporting Disclosure [Text Block]
Segment information
Common equity tier one risk based capital divided by risk weighted assets as defined by regulations.
Common Equity Tier One Risk Based Capital To Risk Weighted Assets
Common equity Tier 1 ("CET1") to risk-weighted assets, Minimum
Ratio
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Financial liabilities:
Due after one year through five years
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, after Year One through Five
Federal reserve bank of New York.
Federal Reserve Bank Of New York [Member]
Federal Reserve Bank of New York [Member]
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]
Deferred Tax Assets (Liabilities)
Net prior service cost
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), before Tax
Schedule of Goodwill [Table Text Block]
Summary of Goodwill Assigned to Reportable Segments for Purposes of Testing for Impairment
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss
Available For Sale Securities Continuous Unrealized Losses Position Less Than Twelve Months Aggregate Losses
Deferred Tax Liabilities, Other
Other
Number of basis points, or hundredths of one percent, added to the three month London Interbank Offered Rate to determine the dividend rate on Series E preferred stock after February 14, 2024.
London Interbank Offered Rate Plus Basis Points
London Interbank offered rate plus basis points
Fair Value Hierarchy and NAV [Domain]
Fair Value Hierarchy and NAV
Trading account.
Trading Account
Trading account
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions
Increases as a result of tax positions taken in prior years
Deferred Tax Liabilities, Mortgage Servicing Rights
Capitalized servicing rights
Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 20 Percent Adverse Change in Discount Rate
Impact on fair value of 20% adverse change
Unrealized gain (losses) on cash flow hedges
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, Tax
Measurement Frequency [Domain]
Measurement Frequency
Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block]
Notional Amount of Interest Rate Swap Agreements Outstanding Maturity
2023
Sales-Type and Direct Financing Leases, Lease Receivable, to be Received, Year One
Defined Benefit Plan, Health Care Cost Trend Rate Assumed, Next Fiscal Year
Annual rate of increase in health care cost assumed for next fiscal year
Summary of lease financing receivables.
Summary Of Lease Financing Receivables Table [Text Block]
Summary of Lease Financing Receivables
Lease, Cost [Abstract]
Lease cost
Entity [Domain]
Entity
Series I fixed rate reset non cumulative perpetual preferred stock.
Series I Fixed Rate Reset Non Cumulative Perpetual Preferred Stock [Member]
Series I Fixed-Rate Reset Non-Cumulative Perpetual Preferred Stock [Member]
Schedule of borrowings.
Schedule Of Borrowings [Line Items]
Schedule Of Borrowings [Line Items]
Condensed Income Statement [Table Text Block]
Condensed Statement of Income
Variable rate subordinated notes due two thousand and twenty one.
Variable Rate Subordinated Notes Due Two Thousand And Twenty One [Member]
Variable Rate Due 2021 [Member]
Income loss before equity in undistributed income of subsidiaries.
Income Loss Before Equity In Undistributed Income Of Subsidiaries
Income before equity in undistributed income of subsidiaries
Defined Benefit Plan, Plan Assets, Contributions by Employer
Employer contributions
Employer contribution
Cover [Abstract]
Servicing Asset at Fair Value, Amount
Fair value of residential loan servicing assets
Servicing Asset at Fair Value, Amount, Beginning Balance
Servicing Asset at Fair Value, Amount, Ending Balance
Quantitative information related to significant unobservable inputs.
Quantitative Information Related To Significant Unobservable Inputs Table [Text Block]
Quantitative Information Related to Significant Unobservable Inputs
Concentration Risk, Percentage
Concentration risk percentage
Product and Service [Domain]
Product and Service
Accounting Changes and Error Corrections [Abstract]
Measurement Basis [Axis]
Cumulative Amount of Fair Value Hedging Adjustment Increasing (Decreasing) the Carrying Amount [Member]
Other discount
Financing Receivable Allowance For Credit Losses Other Discount
Financing Receivable Allowance For Credit Losses Other Discount
Bayview Financial.
Bayview Financial [Member]
Bayview Financial [Member]
Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, Year One
Due in one year or less
Preferred stock redemption period after stock disqualifies as tier I capital.
Preferred Stock Redemption Period After Stock Disqualifies As Tier I Capital
Preferred Stock, Redemption Feature, Redemption Term
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period
Restricted Stock Outstanding, Vested
Sub servicing loan.
Sub Servicing Loan [Member]
Residential Mortgage Sub Servicing Loan [Member]
Investment in debt securities gross unrealized gains.
Investment In Debt Securities Gross Unrealized Gains
Total debt securities Gross unrealized gains
Long term debt two thousand twenty.
Long Term Debt Two Thousand Twenty [Member]
Term Loans 2020 [Member]
Readily marketable securities at fair value gross unrealized losses.
Readily Marketable Securities At Fair Value Gross Unrealized Losses
Readily marketable securities Gross unrealized losses
First Maryland Capital I variable rates due 2027.
First Maryland Capital One Variable Rates Due Two Zero Two Seven [Member]
First Maryland Capital I - due 2027 [Member]
Fixed rate term loans of senior notes due two thousand twenty.
Fixed Rate Term Loans Of Senior Notes Due Two Thousand Twenty [Member]
Fixed Rate Term Loans 2.10% Due 2020 [Member]
Disposal Group Name [Domain]
Income attributable to unvested stock based compensation awards. This amount is used as a reduction to net income available to common equity in the calculation of net income available to common shareholders as used in the determination of basic earnings per common share.
Income Attributable To Unvested Stock Based Compensation Awards Basic
Less: Income attributable to unvested stock-based compensation awards
Maximum [Member]
Maximum [Member]
Schedule of Defined Benefit Plans Disclosures [Table Text Block]
Net Periodic Pension Expense for Defined Benefit Plans
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity [Abstract]
Debt securities held to maturity:
Amortized cost and fair value debt securities.
Amortized Cost And Fair Value Debt Securities [Abstract]
U S treasury rate plus additional rate.
U S Treasury Rate Plus Additional Rate
U S treasury rate plus additional rate
Interest Expense, Foreign Deposits
Deposits at Cayman Islands office
Proceeds from sale of equity and other securities investments.
Proceeds From Sale Of Equity And Other Securities Investments
Proceeds from sales of investment securities equity and other
Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entity Primary Beneficiary [Member]
Interest Expense, Time Deposits
Time deposits
Interest Expense, Time Deposits, Total
OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax
Unrealized holding gains (losses), net of tax
Minimum Future Lease Payments to be Received from Lease Financings
Sales-type and Direct Financing Leases, Lease Receivable, Maturity [Table Text Block]
Domestic mutual fund equity securities.
Domestic Mutual Fund Equity Securities [Member]
Domestic Mutual Fund Equity Securities [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) [Line Items]
Net Cash Provided by (Used in) Investing Activities
Net cash provided (used) by investing activities
Amount of contract to service financial assets originated during the period, under which the benefits of servicing are expected to more than adequately compensate the servicer.
Servicing Asset At Amortized Value Originations
Originations
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period
Stock Options Outstanding, Exercised
Collateral Held [Axis]
Collateral Held
Series H Preferred Stock [Member]
Series H Preferred Stocks [Member]
Series H preferred stocks.
Goodwill and Intangible Assets Disclosure [Text Block]
Goodwill and other intangible assets
Unearned income
Finance Leases Net Investment in Direct Financing Leases Unearned Income
Finance leases net investment in direct financing leases unearned income.
Fair Value, Inputs, Level 3 [Member]
Significant Unobservable Inputs (Level 3) [Member]
Commitments to extend credit for commercial and other.
Commitments To Extend Credit For Commercial And Other
Commercial and other
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Defined Benefit Plans [Member]
Derivative Liability, Subject to Master Netting Arrangement, before Offset
Liability Derivatives, Fair Value
Derivative Liability, Fair Value, Gross Liability, Total
Deferred Tax Liabilities, Gross
Gross deferred tax liabilities
Deferred Tax Liabilities, Gross, Total
Accrued interest.
Accrued Interest [Member]
Accrued Interest [Member]
Financial Asset, Aging [Axis]
Financial Asset, Aging
Equity and other securities (cost: $933,766 at December 31, 2022; $461,516 at December 31, 2021)
Equity and other securities estimated fair value.
Equity And Other Securities Estimated Fair Value
Equity and other securities, Estimated Fair Value
Collective Investment Trust [Member]
Collective Investment Trust.
Cash
Cash in subsidiary bank
Cash, Beginning Balance
Cash, Ending Balance
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Outstanding Balance
Outstanding balance of secured debt
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Due Date, Last
Advances from the FHLB latest maturity date,
Loan Restructuring Modification [Axis]
Payment Deferral [Member]
Maximum amount of employer matching contributions to the defined contribution plan for an eligible employee stated as a percentage of the eligible employee's contribution.
Percentage Of Employee Benefit Plan Expected Contribution By Employer
Percentage of employer matching contribution to employee's contribution
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]
Prior Period Reclassification Adjustment
Adoption of new accounting standard
The amount of defined benefit pension plan assets that consist of real estate, private equity and other investments, as a percentage of the total defined benefit pension plan assets.
Defined Benefit Plan Percentage Of Plan Assets
Percentage of total assets
Subordinated Debt
Subordinated notes
Subordinated Debt, Total
Subordinated Debt, Beginning Balance
Subordinated Debt, Ending Balance
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3
Transfers out of Level 3
2027
Finite-Lived Intangible Asset, Expected Amortization, Year Five
Other Long-Term Debt
Other
Other Long-term Debt, Total
Non-credit discount
Financing Receivable, Credit Loss, Expense (Reversal)
Trading account.
Trading Account Policy [Text Block]
Trading account
Derivative, Average Variable Interest Rate
Weighted-Average Rate, Variable
Net amount of federal, state and local income tax benefit that would be realized if the gross unrecognized tax benefits were to be recognized, including the federal income tax reduction that would result from the payment of the accrued interest on a previously unrecognized tax benefit. This amount reduces the unrecognized tax benefits that, if recognized, would impact the effective income tax rate.
Unrecognized Federal State And Local Income Tax Benefits
Less: Federal, state and local income tax benefits
Variable rate term loans due two thousand and twenty two.
Variable Rate Term Loans Due Two Thousand And Twenty Two [Member]
Variable Rate Term Loans Due 2022 [Member]
Business combinations
Defined Benefit Plan, Benefit Obligation, Business Combination
Parent Company Only Financial Information [Line Items]
Parent Company Only Financial Information [Line Items]
Parent Company Only Financial Information [Line Items]
Defined Contribution Plan, Cost
Qualified defined contribution plans expense during the period
2025
Finite-Lived Intangible Asset, Expected Amortization, Year Three
Intangible Liability Disclosure [Abstract]
Intangible Liability Disclosure [Abstract]
Total aggregate amount of all interest and noninterest expenses.
Expenses
Expenses
Commitments regarding commercial letters of credit.
Commitments Regarding Commercial Letters Of Credit
Commercial letters of credit
Common Stock, Shares Authorized
Common stock, shares authorized
Subordinated Debt [Member]
Subordinated Capital Notes [Member]
Derivative Assets (Liabilities), at Fair Value, Net
Hedged Item
Derivative Assets (Liabilities), at Fair Value, Net, Total
Short-Term Debt, Type [Domain]
Short-term Debt, Type
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate
Defined Benefit Plan, ultimate health care cost trend rate
Trading Symbol
Trading Symbol
Core deposits and other intangible assets .
Core Deposits And Other Intangible Assets [Member]
Core Deposit and Other Intangible Assets [Member]
Equity Securities [Member]
Equity Securities [Member]
Assumption for fair value of interests continued to be held by transferor servicing assets or liabilities option adjusted basis spread on variable rate.
Assumption For Fair Value Of Interests Continued To Be Held By Transferor Servicing Assets Or Liabilities Option Adjusted Basis Spread On Variable Rate
Discounted rate represented weighted-average option-adjusted basis spread point percentage
Net Income (Loss) Available to Common Stockholders, Diluted
Diluted
Net income available to common shareholders
Schedule of Impaired Financing Receivable [Table]
Schedule Of Impaired Financing Receivable [Table]
Interest rate and foreign exchange contracts not designated as hedging instruments
Interest rate and foreign exchange contracts not designated as hedging instruments
Federal Deposit Insurance Corporation Premium Expense
FDIC assessments
Servicing Asset At Amortized Value Additional Disclosures [Abstract]
Servicing Asset At Amortized Value Additional Disclosures [Abstract]
Financing Receivable, Troubled Debt Restructuring [Table Text Block]
Loan Modification Activities that were Considered Troubled Debt Restructurings
The percentage threshold of the likelihood of an uncertain tax position being realized upon ultimate settlement for recognition of the benefit.
Income Tax Benefit Recognition Criteria Percentage Threshold
Income tax benefit recognition criteria percentage threshold
Parent [Member]
M&T Bank [Member]
Other Liabilities
Accrued interest and other liabilities
Other Liabilities, Total
Net increase (decrease) in deposits
Increase (Decrease) in Deposits
Increase (Decrease) in Deposits, Total
Reflects the sum of all revenue and income (prior to any tax credits) recognized by the entity in the period, including dividends from consolidated bank subsidiaries, the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied, and all other revenue and income recognized by the entity.
Income Loss Before Expenses And Tax Credits Attributable To Parent
Total income
Fair Value Hedging [Member]
Fair Value Hedges [Member]
Deferred Tax Assets, Other
Other
Printing, postage and supplies
Printing, postage and supplies.
Cash and Due from Banks
Cash and due from banks
Cash and Due from Banks, Total
Debt Security Category [Axis]
Debt Security Category
Maximum amount of employer matching contributions to the defined contribution plan for an eligible employee stated as a percentage of the eligible employee's qualified compensation.
Maximum Employer Contribution On Employees Qualified Contribution
Maximum employer contribution on Employee's qualified contribution
Balance Sheet Location [Axis]
Balance Sheet Location
Banking Regulation, Total Risk-Based Capital Ratio, Well Capitalized, Minimum
Total capital to risk-weighted assets, Well capitalized
Due after one year through five years
Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five
Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), Gain (Loss), before Tax
Net loss (gain)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent
Total comprehensive income
Total comprehensive income
Professional Fees
Professional services
Transfer of Loans Held-for-sale to Portfolio Loans
Loans held for sale transferred to loans held for investment
Number of shares of common stock issuable in connection with deferred compensation plans.
Common Stock Issuable Share
Common stock issuable, shares
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax
Investment securities available for sale, gross unrealized losses
Carrying value of investment securities pledged to secure borrowings from certain various FHLBs, repurchase agreements, governmental deposits, interest rate swap agreements and available lines of credit.
Investment Securities Pledged To Secure Debt Carrying Value
Investment securities pledged to secure debt carrying value
Plan Name [Axis]
Plan Name
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Unrealized losses on individual debt securities
Debt Securities, Unrealized Gain (Loss)
Debt Securities, Unrealized Gain (Loss), Total
Cash Flow Hedging [Member]
Cash Flow Hedges [Member]
Fair value
Fair value of Purchased loans and leases
Fair value of Purchased loans and leases.
Concentration Risk Type [Domain]
Concentration Risk Type
Commitments to extend credit for home equity lines of credit.
Commitments To Extend Credit For Home Equity Lines Of Credit
Home equity lines of credit
Stockholders Equity Excluding Portion Attributable To Subsidiaries Noncontrolling Interest [Abstract]
Stockholders Equity Excluding Portion Attributable To Subsidiaries Noncontrolling Interest [Abstract]
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount
Income taxes at statutory federal income tax rate
Director [Member]
Directors’ Stock Compensation Programs [Member]
Long-Lived Tangible Asset [Domain]
Long-Lived Tangible Asset
Mortgage-Backed Securities Held-to-Maturity, Fair Value Disclosure
Investment securities in held-to-maturity portfolio securitized by Bayview Financial
Debt Instrument, Term
Stated maturity
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)
Included in other comprehensive income
Debt and Equity Securities, Gain (Loss)
Gain (loss) on bank investment securities
Debt and Equity Securities, Gain (Loss), Total
Initial estimate of expected credit losses
Initial Estimate Of Expected Credit Losses
Initial estimate of expected credit losses.
Common Stock, Par or Stated Value Per Share
Common stock, par value
Entity Well-known Seasoned Issuer
Entity Well-known Seasoned Issuer
Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block]
Summary of Restricted Stock and Restricted Stock Unit Activity
Variable Lease, Cost
Variable lease cost
Financial Asset, Not Past Due [Member]
Current [Member]
Fair value of Preferred stock converted
Convertible Preferred Stock Converted to Other Securities
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield
Balance at end of period
Balance at beginning of period
Conversion of Series H preferred stock
Stock Issued During Period, Value, Conversion of Convertible Securities
Financing Receivable, Allowance for Credit Loss [Table Text Block]
Changes in Allowance for Credit Losses
Measurement input adjustments.
Measurement Input Adjustments
Discount rates for fair value estimations
Period of time that a delinquent loan secured by real estate will result in the excess of the loan balance over the net realizable value of the property collateralizing the loan is charged off.
Delinquent Period Of Loans Secured By Real Estate Resulting In Charge Off
Delinquent period of loans secured by real estate resulting in charge off
Servicing Asset at Amortized Cost [Line Items]
Servicing Asset at Amortized Cost [Line Items]
Other assets and other liabilities.
Other Assets And Other Liabilities [Member]
Other Assets and Other Liabilities [Member]
Due after five years through ten years
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, after Year 5 through 10
Trading Activity, by Type [Domain]
Trading Activity, by Type
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period
Restricted Stock Outstanding, Granted
Common stock issued
Stock Issued During Period, Value, Acquisitions
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Disclosure [Line Items]
Derivative Instrument [Axis]
Derivative Instrument
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period
Period of satisfaction of contract with customer
Long-term fixed rate advances from the FHLB.
Long Term Fixed Rate Advances From Fhlb [Member]
Long Term Fixed Rate Advances From Fhlb
Property, Plant and Equipment Disclosure [Text Block]
Premises and equipment
Commitments to extend credit for other residential real estate.
Commitments To Extend Credit For Other Residential Real Estate
Other residential real estate
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price
Weighted-Average Exercise Price, Granted
Commercial financial leasing.
Commercial Financial Leasing [Member]
Commercial, Financial, Leasing, etc. [Member]
Schedule of Defined Benefit Plan Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block]
Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income
Estimate of Fair Value Measurement [Member]
Cumulative Amount of Fair Value Hedging Adjustment Increasing (Decreasing) the Carrying Amount [Member]
Other assets
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets
Unusual Risk or Uncertainty, Nature [Domain]
Unusual Risk or Uncertainty, Nature
Financing Receivable, 90 Days or More Past Due, Still Accruing
Accruing Loans Past Due 90 Days or More
Debt Instrument [Line Items]
Debt Instrument [Line Items]
Long-Term Debt, Type [Domain]
Long-term Debt, Type
Increase (Decrease) in Fair Value of Interest Rate Fair Value Hedging Instruments
Estimated Fair Value Gain (Loss)
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount
Antidilutive securities excluded from computation of earnings per share
Defined Benefit Plan, Expected Return (Loss) on Plan Assets
Expected return on plan assets