Changes in AOCIL [Roll Forward] AOCI Attributable to Parent, Net of Tax [Roll Forward] Award Type [Axis] ASU 2016-13 [Member] COVID-19 [Abstract] Accumulated Other Comprehensive Income (Loss) [Table] Unrealized Losses on Cash Flow Hedges [Member] Unrealized Losses on Cash Flow Hedges [Member] Accumulated Other Comprehensive Income (Loss) [Line Items] Unrealized Gains on Securities Available For Sale [Member] AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member] Accumulated other comprehensive income for regulatory purposes Accumulated other comprehensive income Accumulated Other Comprehensive Income (Loss) [Member] AOCI Attributable to Parent [Member] Accumulated Other Comprehensive Income (Loss) ("AOCIL") [Abstract] Residential Adjustable Rate Mortgage Loans [Member] Total Adjustments Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities Adjustments to Reconcile Net Income to Net Cash From Operating Activities Share based compensation withholding obligation Share-based Payment Arrangement, Decrease for Tax Withholding Obligation Accounting Standards Update [Axis] Adjustments for New Accounting Pronouncements [Axis] Advertising Total compensation expense recognized ACL and Recorded Investment in Loans by Portfolio Segment Increase in allowance for credit losses Allowance for Loan and Lease Losses, Period Increase (Decrease) Antidilutive Securities [Axis] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive shares excluded from computation of diluted loss per share (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Antidilutive Securities, Name [Domain] Impairment charges recognized [Abstract] Other real estate, additional charge Asset Impairment Charges Other Asset Backed [Member] Asset-backed Securities [Member] Supplemental balance sheet information related to operating leases [Abstract] Assets [Abstract] Assets, Fair Value Disclosure [Abstract] Total Assets Total Assets Assets Assets Assets [Abstract] Assets [Abstract] Unrealized Losses Unrealized Gains Amortized cost Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Amortized Cost Total available-for-sale securities fair value Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Fair Value Amortized cost Debt Securities, Available-for-sale, Amortized Cost Maturing after one year but within five years Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year One Through Five Maturing after five years but within ten years Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 Maturing after one year but within five years Maturing after five years but within ten years Maturing after ten years Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 10 Available-for-sale Securities, Amortized Cost Basis [Abstract] Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract] Total Securities available for sale Securities available for sale Fair Value U.S. agency residential mortgage-backed U.S. agency residential mortgage-backed Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Fair Value Maturing after ten years Maturing within one year Gain and losses realized on sale of securities available for sale [Abstract] Maturing within one year Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, Year One Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract] Debt Securities, Available-for-sale, Amortized Cost, Fiscal Year Maturity [Abstract] Balance Sheet Location [Domain] Balance Sheet Location [Axis] Bank-owned life insurance Bank owned life insurance Minimum for Well-Capitalized Institutions, Ratio Banking Regulation, Common Equity Tier One Risk-Based Capital Ratio, Well Capitalized, Minimum Capital conservation buffer Banking Regulation, Capital Conservation Buffer, Capital Conserved, Minimum Minimum for Adequately Capitalized Institutions, Ratio Banking Regulation, Common Equity Tier One Risk-Based Capital Ratio, Capital Adequacy, Minimum Total capital to risk-weighted assets [Abstract] Total risk-based capital Banking Regulation, Total Capital, Actual Minimum for Well-Capitalized Institutions, Ratio Banking Regulation, Total Risk-Based Capital Ratio, Well Capitalized, Minimum Minimum for Adequately Capitalized Institutions, Amount Actual, Ratio Banking Regulation, Total Risk-Based Capital Ratio, Actual Minimum for Adequately Capitalized Institutions, Ratio Banking Regulation, Total Risk-Based Capital Ratio, Capital Adequacy, Minimum Minimum for Well-Capitalized Institutions, Amount Banking Regulation, Total Risk-Based Capital, Well Capitalized, Minimum Recorded Book Balance [Member] Reported Value Measurement [Member] Net Increase (Decrease) in Cash and Cash Equivalents Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect Cash and Cash Equivalents at End of Period Cash and Cash Equivalents at Beginning of Period Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Information Regarding Options Exercised Cash and Cash Equivalents Cash and Cash Equivalents, at Carrying Value Cash and due from banks Cash Flow Hedge Designation [Member] Loans acquired with deteriorated credit quality Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance Class of Stock [Line Items] Collateral Held [Domain] Collateral Held [Axis] Commercial Real Estate [Member] Commercial Real Estate Portfolio Segment [Member] Commercial [Member] Commercial and Industrial [Member] Commercial [Member] U.S. Agency Commercial Mortgage-Backed [Member] Contingencies [Abstract] Contingencies Commitments and Contingencies Disclosure [Text Block] Commitments and contingent liabilities Common stock, par value (in dollars per share) Actual, Ratio Banking Regulation, Common Equity Tier One Risk-Based Capital Ratio, Actual Cash dividends declared (in dollars per share) Minimum for Well-Capitalized Institutions, Amount Banking Regulation, Common Equity Tier One Risk-Based Capital, Well Capitalized, Minimum Common equity tier 1 capital to risk-weighted assets [Abstract] Banking Regulation, Common Equity Tier One Risk-Based Capital [Abstract] Common equity tier 1 capital Actual, Amount Banking Regulation, Common Equity Tier One Risk-Based Capital, Actual Common Stock [Member] Minimum for Adequately Capitalized Institutions, Amount Banking Regulation, Common Equity Tier One Risk-Based Capital, Capital Adequacy, Minimum Common stock, shares issued (in shares) Common stock, no par value, 500,000,000 shares authorized; issued and outstanding: 21,321,092 shares at September 30, 2021 and 21,853,800 shares at December 31, 2020 Common Stock, Value, Issued Common stock, shares authorized (in shares) Common stock, shares outstanding (in shares) Communications Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] Comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Accumulated Other Comprehensive Income (Loss) ("AOCIL") Comprehensive Income (Loss) Note [Text Block] Consolidated [Member] Consolidated Entities [Member] Retail [Member] Consumer Portfolio Segment [Member] Contract assets Contract liabilities Corporate [Member] Credit Score, FICO [Domain] Credit Loss Status [Axis] Credit Score, FICO [Axis] Credit Loss Status [Domain] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Table] Disaggregation of Revenue Sources by Attribute Disaggregation of Revenue Sources by Attributes [Abstract] Designated as Hedging Instrument [Member] Less Than Twelve Months, Fair Value Twelve Months or More, Fair Value Available-for-sale, allowance for credit losses Total, Fair Value Debt Securities, Available-for-sale, Unrealized Loss Position Accrued interest receivable Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss Credit related charges recognized in earnings Debt Securities, Available-for-sale, Change in Present Value, Expense (Reversal) Total, Unrealized Losses Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss Number of securities with market fair value less than amortized cost Remaining noncredit discount, amount Net gains on securities available for sale Realized losses Less Than Twelve Months, Unrealized Losses Realized gains Twelve Months or More, Unrealized Losses Deferred tax assets Deferred Income Tax Assets, Net Savings and interest-bearing checking Total Deposits Deposits Deposits Deposits [Abstract] Net depreciation, amortization of intangible assets and premiums and accretion of discounts on securities and loans Depreciation, Amortization and Accretion, Net Notional Amount Average Maturity Derivative Instrument [Axis] Derivative Financial Instruments [Abstract] Derivative financial instruments Derivatives Derivative Financial Instruments Derivative Instruments and Hedging Activities Disclosure [Text Block] Derivative financial instruments Derivatives Derivative Liability Derivative financial instrument according to type of hedge [Abstract] Fair value of derivative instruments, balance sheet location [Abstract] Asset Derivatives Derivative Asset, Fair Value, Gross Asset Liability Derivatives Fair Value Derivative, Fair Value, Net Gain (Loss) Recognized in Income Derivative Instruments, Gain (Loss) [Line Items] Derivative Contract [Domain] Loss Reclassified from Accumulated Other Comprehensive Income into Income (Effective Portion) Derivative Instruments, Gain (Loss) [Table] Hedging Relationship [Axis] Derivatives, Fair Value [Line Items] Share Based Compensation [Abstract] Share Based Compensation Share-based Payment Arrangement [Text Block] Cash dividends declared Dividends, Common Stock, Cash Earnings Per Share Reconciliation [Abstract] Basic (in dollars per share) Basic (in dollars per share) Net Income Per Common Share Earnings Per Share [Abstract] Diluted (in dollars per share) Earnings Per Share, Diluted (Decrease) increase in income tax expense Tax benefit realized Total compensation cost not yet recognized, period for recognition Stock Options [Member] Tax benefit relating to compensation expense recognized Share-based Payment Arrangement, Expense, Tax Benefit Total compensation cost not yet recognized Furniture, fixtures and equipment Equipment Expense Equity Component [Domain] Fair Value [Member] Estimate of Fair Value Measurement [Member] Included in results of operations Included in other comprehensive income (loss) Amount of total losses for the period included in earnings attributable to the change in unrealized gains (losses) relating to assets and liabilities still held at September 30 Asset Fair Value [Abstract] Fair Value, Net Asset (Liability) [Abstract] Quantitative information about Level 3 fair value measurements measured on a non recurring basis [Abstract] Fair Value Measurement Inputs and Valuation Techniques [Abstract] Liability Class [Axis] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value Measurement Inputs and Valuation Techniques [Line Items] Fair Value, Hierarchy and NAV [Axis] Fair Value Disclosures [Abstract] Assets and Liabilities Measured at Fair Value Measurement Basis [Axis] Fair Value Measurement Inputs and Valuation Techniques [Table] Changes in fair value for financial assets [Abstract] Assets and liabilities measured at fair value [Abstract] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract] Quantitative Information About Level 3 Fair Value Measurements Measured on a Recurring Basis and Non-recurring Basis Measurement Frequency [Axis] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Hierarchy and NAV [Domain] Recurring Basis [Member] Fair Value, Recurring [Member] Fair Value by Liability Class [Domain] Nonrecurring Basis [Member] Fair Value, Nonrecurring [Member] Fair Value, Measurement Frequency [Domain] Fair Value Disclosures Fair Value Disclosures [Text Block] Estimated Recorded Book Balances and Fair Values Fair Value, by Balance Sheet Grouping [Table Text Block] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, by Balance Sheet Grouping [Table] Reconciliation for all Assets Measured at Fair Value on a Recurring Basis Using Significant Unobservable Inputs (Level 3) Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Fair Value Measurement [Domain] Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] Significant Other Observable Inputs (Level 2) [Member] Significant Other Observable Inputs (Level 2) [Member] Ending balance Beginning balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Significant Unobservable Inputs (Level 3) [Member] Significant Un-observable Inputs (Level 3) [Member] Fair Value, Inputs, Level 3 [Member] Reconciliation for all assets and (liabilities) measured at fair value on a recurring basis using significant unobservable inputs (Level 3) [Roll Forward] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Transfers in and/or out of Level 3 Purchases, issuances, settlements, maturities and calls Difference Fair Value, Option, Aggregate Differences, Loans and Long-term Receivables Changes in Fair Value for Financial Assets Fair Value, Option, Quantitative Disclosures [Table] Fair Value, Option, Quantitative Disclosures [Line Items] Fair Value Hedge Designation [Member] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] FDIC deposit insurance Federal Home Loan Bank and Federal Reserve Bank stock, at cost Federal Home Loan Bank and Federal Reserve Bank Stock Federal Home Loan Bank Stock and Federal Reserve Bank Stock Loans Past Due Total [Member] Financial Instrument Performance Status [Domain] Loans Not Past Due [Member] Loans Acquired with Deteriorated Credit Quality [Member] Financial Asset Acquired with Credit Deterioration [Member] Financial Instrument Performance Status [Axis] Financial Instrument [Axis] Liabilities [Abstract] Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract] Assets [Abstract] Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] Fair Values of Financial Instruments [Abstract] Fair Values of Financial Instruments Financial Instruments Disclosure [Text Block] Initial allowance on loans purchased with credit deterioration Amortized cost basis of PCD assets, adjusted amount Loans Past Due, 90+ days [Member] 2020 Loans Past Due, 60-89 days [Member] Loans Past Due, 30-59 days [Member] 2017 Financing Receivables, Period Past Due [Domain] Financing Receivables, Period Past Due [Axis] Pre-modification recorded balance Financing Receivable, Troubled Debt Restructuring, Premodification Revolving loans amortized, Cost basis Number of contracts Financing Receivable, Modifications, Number of Contracts Recoveries credited to the allowance Financing Receivable Portfolio Segment [Axis] 2018 Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 2021 Financing Receivable, Year One, Originated, Current Fiscal Year Non-Accrual with no Allowance for Credit Loss Post-modification recorded balance Financing Receivable, Troubled Debt Restructuring, Postmodification 2019 Prior Financing Receivable, Originated, More than Five Years before Current Fiscal Year Individually evaluated for impairment Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment Accrued interest excluded from total Accrued interest excluded from total Financing Receivable Portfolio Segment [Domain] Financing Receivable Portfolio Segment [Domain] Allowance for loan losses and recorded investment in loans by portfolio segment [Abstract] Loan Ratings by Loan Class Financing Receivable Credit Quality Indicators [Table Text Block] Financing Receivable, Past Due [Line Items] Financing Receivable, Allowance for Credit Losses [Line Items] Individually evaluated for impairment Collectively evaluated for impairment TDR Modifications recorded balance Financing Receivable, Modifications [Line Items] Analysis of allowance for loan losses by portfolio segment [Roll Forward] 90+ and Still Accruing Loans charged against the allowance Financing Receivable, Allowance for Credit Loss, Writeoff Increase in allowance for credit losses Increase in allowance for credit losses Financing Receivable, Recorded Investment [Line Items] Total Non-Accrual Financing Receivable, Nonaccrual Financing Receivable, Impaired [Line Items] Collectively evaluated for impairment Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment Class of Financing Receivable, Type [Domain] Class of Financing Receivable [Domain] Balance at end of period Impact of adoption of ASC 326 Allowance for credit losses Allowance for credit losses Financing Receivable, Allowance for Credit Loss Charge offs due to troubled debt restructurings Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down Class of Financing Receivable, Type [Axis] Class of Financing Receivable [Axis] 2025 Finite-Lived Intangible Asset, Expected Amortization, Year Four Three months ending December 31, 2021 Finite-Lived Intangible Asset, Expected Amortization, Remainder of Fiscal Year 2023 Finite-Lived Intangible Asset, Expected Amortization, Year Two Accumulated Amortization 2024 Finite-Lived Intangible Asset, Expected Amortization, Year Three Summary of estimated core deposits intangible amortization [Abstract] Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract] Gross Carrying Amount 2022 Finite-Lived Intangible Asset, Expected Amortization, Year One Total Finite-Lived Intangible Assets, Net Residential Fixed Rate Mortgage Loans [Member] Fixed Income Interest Rate [Member] Food Service [Member] Other real estate and repossessed assets, net Foreign Government [Member] Gain on sale of loans Mortgage loans Net gains on mortgage loans Net gains on assets Goodwill and Other Intangibles Goodwill and Intangible Assets Disclosure [Text Block] Goodwill Gross Carrying Amount Unamortized intangible assets - goodwill [Abstract] Goodwill, Impaired, Accumulated Impairment Loss [Abstract] Goodwill and Other Intangibles [Abstract] Hedging Designation [Axis] Hedging Relationship [Domain] Hedging Designation [Domain] Impaired Loans by class [Abstract] Impaired Financing Receivable, Recorded Investment [Abstract] Related Allowance Impaired Financing Receivable, Related Allowance Recorded Investment, with no related ACL recorded Impaired Financing Receivable, with No Related Allowance, Recorded Investment Unpaid Principal Balance, with no related ACL recorded Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance Unpaid Principal Balance Average Recorded Investment Recorded Investment, with an ACL recorded Impaired Financing Receivable, with Related Allowance, Recorded Investment Interest Income Recognized, with no related ACL recorded Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method Interest Income Recognized, with an a ACL recorded Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method Recorded Investment Impaired Loans Interest Income Recognized Impaired Financing Receivable, Interest Income, Accrual Method Unpaid Principal Balance, with an ACL recorded Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance Average Recorded Investment, with an a ACL recorded Impaired Financing Receivable, with Related Allowance, Average Recorded Investment Average Recorded Investment, with no related ACL recorded Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment Income Before Income Tax Total reclassifications before tax Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Income Statement Location [Domain] Income Tax [Abstract] Income Statement Location [Axis] Condensed Consolidated Statements of Operations [Abstract] Income Tax Income Tax Disclosure [Text Block] Income tax expense Income tax expense Income taxes Increase in accrued expenses and other liabilities Increase (Decrease) in Accrued Liabilities and Other Operating Liabilities Net increase in total deposits Deferred income tax expense (benefit) Increase (Decrease) in Deferred Income Taxes Loans held for sale [Abstract] Increase (Decrease) in Loans Held-for-sale [Abstract] Net deferred loan fees (costs) Increase (Decrease) in Loans, Deferred Income Increase in accrued income and other assets Increase (Decrease) in Other Operating Assets Increase (Decrease) in Stockholders' Equity [Roll Forward] Effect of stock options (in shares) Amortized intangible assets - core deposits [Abstract] Other intangibles Goodwill and other intangibles Intangible Assets, Net (Including Goodwill) Interest Rate Swaption Agreement [Member] Interest on securities available for sale Accrued interest payable Interest and fees on loans Interest and fees on loans Total Interest Income Interest and Dividend Income, Operating Interest Income Interest Expense Interest Expense [Abstract] Total Interest Expense Interest expense Other borrowings and subordinated debt and debentures Interest Expense, Borrowings Deposits Interest Expense, Deposits Net Interest Income Interest Income (Expense), Net Net Interest Income After Provision for Credit Losses Interest Income (Expense), after Provision for Loan Loss Interest Income [Member] Interest-Rate Cap Agreements [Member] Interest Tax-exempt Taxable Time Interest bearing deposits Interest-bearing Deposits in Banks and Other Financial Institutions Accrued interest receivable Accrued interest included in recorded investment Accrued interest included in total Interest Receivable Interest Rate Swap [Member] Interest Rate Swap [Member] Rate-Lock Mortgage Loan Commitments [Member] Brokered time Interest Expense [Member] Internal Credit Assessment [Axis] Internal Credit Assessment [Domain] Investments [Domain] Visa Stock [Abstract] Investment Owned, Balance [Abstract] Number of shares owned (in shares) Investment Owned, Balance, Shares Investment Type [Axis] Investment Holdings [Table] Amortized Cost and Fair Value of Securities Available for Sale by Contractual Maturity Securities [Abstract] Securities Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Subordinated debentures Subordinated debentures Leases Lessee, Operating Leases [Text Block] 2022 Total lease payments Lessee, Operating Lease, Liability, to be Paid Less imputed interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount 2025 Three months ending December 31, 2021 2024 Maturity Analysis of Lease Liabilities 2023 Compensation and employee benefits Components of operating leases [Abstract] Total Lease, Cost Components of Operating Leases Leases [Abstract] Liabilities [Abstract] Liabilities, Fair Value Disclosure [Abstract] Total Liabilities Total Liabilities Liabilities Liabilities and Shareholders' Equity Liabilities and shareholder's equity [Abstract] Total Liabilities and Shareholders' Equity Liabilities and Equity Loans Insured or Guaranteed by Government Authorities [Domain] Balance at end of period Balance at beginning of period Total ending ACL Allowance for credit losses Loans and Leases Receivable, Allowance Loans Insured or Guaranteed by Government Authorities [Axis] Loans and leases receivable Loans and Leases Receivable, Gross Loans Loans [Abstract] Total loans Loans Loans and Leases Receivable, Net of Deferred Income Loans [Abstract] Loans and Leases Receivable, Other Information [Abstract] Net Loans Loans and Leases Receivable, Net Amount Loans held for sale, carried at fair value Aggregate Fair Value Loans Held-for-sale, Fair Value Disclosure Contractual Principal Financing Receivable, Held-for-Sale Loans receivable Loans Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Net gains on securities available for sale Securities available for sale Marketable Securities, Gain (Loss), Excluding Other-than-temporary Impairment Loss Adjustment for Differences Between Comparable Sales [Member] Measurement Input Type [Axis] Measurement Input Type [Domain] Discount Rate [Member] Prepayment Rate [Member] Retail mortgage loans in process of foreclosure U.S. Agency Residential Mortgage-Backed [Member] Private Label Mortgage-Backed [Member] Private Label Mortgage-Backed [Member] Non-Performing Loans [Member] Non-performing TDRs [Member] Net Cash From Financing Activities Net Cash Provided by (Used in) Financing Activities Cash Flow From Financing Activities Net Cash From Operating Activities Net Cash Provided by (Used in) Operating Activities Cash Flow Used in Investing Activities Net Cash Provided by (Used in) Investing Activities [Abstract] Net Cash Used in Investing Activities Net Cash Provided by (Used in) Investing Activities Net income Net Income Net Income Reclassifications, net of tax Net income per common share [Abstract] Net Income (Loss) Available to Common Stockholders, Diluted [Abstract] New Accounting Pronouncements or Change in Accounting Principle [Table] New Accounting Standards New Accounting Pronouncements, Policy [Policy Text Block] New Accounting Pronouncements or Change in Accounting Principle [Line Items] New Accounting Standards Accounting Standards Update and Change in Accounting Principle [Text Block] New Accounting Standards [Abstract] Non-interest bearing Total Non-interest Expense Noninterest Expense Total Non-interest Income Noninterest Income Non-interest Expense Total Other Noninterest Income, Other Operating Income Non-interest Income Total loans Loans Total loans Net Loans Financing Receivable, after Allowance for Credit Loss Loans Financing Receivable, after Allowance for Credit Loss [Abstract] No Hedge Designation [Member] Other comprehensive income (loss) before reclassifications OCI, before Reclassifications, Net of Tax, Attributable to Parent Occupancy, net Operating Lease, Liability, Statement of Financial Position [Extensible List] Weighted average discount rate Maturities of lease liabilities [Abstract] Operating leases Operating Lease, Payments Lease right of use asset Operating Lease, Right-of-Use Asset Operating lease cost Weighted average remaining lease term Operating Lease, Weighted Average Remaining Lease Term Total Lease liabilities Operating Lease, Liability Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] Preparation of Financial Statements [Abstract] Preparation of Financial Statements Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block] Unrealized gains recognized in other comprehensive income (loss) on derivative instruments Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, before Tax, Parent Unrealized gains recognized in other comprehensive income (loss) on derivative instruments, net of tax Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax, Parent Income tax expense Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), Adjustments, Tax Gain (Loss) Recognized in Other Comprehensive Income (Loss) (Effective Portion) Unrealized losses arising during period Net impairment loss recognized in earnings Other-than-temporary Impairment Loss, Debt Securities, Available-for-sale, Recognized in Earnings Reclassification adjustment for expense recognized in earnings Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax Reclassification adjustments for gains included in earnings Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax Unrealized gains (losses) recognized in other comprehensive income (loss) on securities available for sale OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment, before Tax Unrealized gains (losses) recognized in other comprehensive income (loss) on securities available for sale, net of tax OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment and Tax Income tax expense (benefit) OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment, Tax Accrued income and other assets Other Assets Securities available for sale OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment, before Tax [Abstract] Other borrowings Other borrowings Other Borrowings Derivative instruments Unrealized gains (losses) arising during period OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment and Tax Other investments Other Interest and Dividend Income Accrued expenses and other liabilities Other Liabilities Other Other Real Estate and Foreclosed Assets [Abstract] Other comprehensive income (loss) Other Liabilities [Member] Other Assets [Member] Other comprehensive income (loss) Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Performing TDRs [Member] Performing Financial Instruments [Member] Aging Analysis of Loans by Class Financing Receivable, Past Due [Table Text Block] Share based compensation withholding obligation Payment, Tax Withholding, Share-based Payment Arrangement Disbursements for loans held for sale Payments for Origination of Mortgage Loans Held-for-sale Repurchase of common stock Payments for Repurchase of Common Stock Purchases of securities available for sale Payments to Acquire Debt Securities, Available-for-sale Dividends paid Payments of Dividends Purchase of Federal Home Loan Bank stock Payments to Acquire Federal Reserve Bank Stock Capital expenditures Payments to Acquire Property, Plant, and Equipment Performance Stock Units [Member] Plan Name [Domain] Plan Name [Axis] Portion at Fair Value Measurement [Member] Portion at Fair Value Measurement [Member] Preferred stock, no par value, 200,000 shares authorized; none issued or outstanding Preferred Stock, Value, Issued Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Preferred stock, par value (in dollars per share) Preferred Stock, No Par Value Preferred stock, shares outstanding (in shares) Preferred Stock, Shares Outstanding Preferred stock, shares issued (in shares) Impact of Adoption [Abstract] Prior Period Adjustment [Abstract] Proceeds from the maturity of interest bearing deposits - time Proceeds from (Payments for) in Interest-bearing Deposits in Banks Net decrease in other borrowings Proceeds from Federal Home Loan Bank Advances Proceeds from FHLBank Borrowings, Financing Activities Proceeds from issuance of subordinated debt, net of issuance costs Proceeds from bank-owned life insurance Proceeds from maturities, prepayments and calls of securities available for sale Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-sale Proceeds from issuance of common stock Proceeds Proceeds from the sale of securities available for sale Sale of Mortgage Loans [Abstract] Proceeds from sale of loans Proceeds from the sale of portfolio loans Proceeds from sales of loans held for sale Proceeds from Sale of Loans Held-for-sale Proceeds from the sale of other real estate and repossessed assets Cash proceeds received Legal and professional Property and equipment, net Provision for credit losses Financing Receivable, Credit Loss, Expense (Reversal) Additional provision for credit losses on collateral dependent loans Right of use assets obtained in exchange for lease obligations Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Real Estate [Member] Foreclosed residential real estate properties Other real estate, valuation allowance Real Estate Owned, Valuation Allowance Loans [Abstract] Reclassification out of Accumulated Other Comprehensive Income [Table] Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Domain] Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] Amounts reclassified from AOCIL Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent Reclassification out of Accumulated Other Comprehensive Income [Member] Reclassifications Out of Each Component of AOCIL Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] Regulatory Matters Regulatory Capital Requirements under Banking Regulations [Text Block] Payments of Federal Home Loan Bank Advances Payments of FHLBank Borrowings, Financing Activities Mortgage [Member] Residential Portfolio Segment [Member] Restricted Stock [Member] Retail [Member] Retained Earnings [Member] Retained earnings Revenue from Contracts with Customers [Abstract] Revenue from contracts with customers Revenue from Contract with Customer, Excluding Assessed Tax Revenue from Contracts with Customers Vested and expected to vest, weighted-average remaining contractual term Outstanding, weighted average remaining contractual term Exercisable, aggregate intrinsic value Exercisable, weighted average remaining contractual term Estimated Core Deposits Intangible Amortization Outstanding Stock Option Grants and Transactions Investments in a Continuous Unrealized Loss Position Gains and Losses Realized on Sale of Securities Available for Sale Schedule of Realized Gain (Loss) [Table Text Block] Non-Vested Restricted Stock, Restricted Stock Units and PSU's Schedule of Financing Receivables Past Due [Table] Analysis of ACL by Portfolio Segment Schedule of Financing Receivable, Recorded Investment, Credit Quality Indicator [Table] Schedule of Impaired Financing Receivable [Table] Reconciliation of Basic and Diluted Net Income Per Share Schedule of Financing Receivable, Troubled Debt Restructurings [Table] Schedule of Financing Receivable, Allowance for Credit Losses [Table] Loans on Non-Accrual Status and Past Due More than 90 Days Securities Available for Sale Schedule of Available-for-sale Securities Reconciliation [Table Text Block] Accumulated Other Comprehensive Income (Loss) (AOCIL), Net of Tax Schedule of Available-for-sale Securities [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Debt Securities, Available-for-sale [Line Items] Other Intangible Assets, Net of Amortization Actual Capital Amounts and Ratios Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block] Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table] Impact of Adoption of this ASU Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Stock by Class [Table] Fair Value of Derivative Instruments Commercial and Retail Loan COVID-19 Accommodations Effect of Derivative Financial Instruments on Consolidated Statement of Operations Servicing asset fair value Servicing Asset Servicing asset measurement input Servicing Asset, Measurement Input Capitalized mortgage loan servicing rights, carried at fair value Servicing Asset at Fair Value, Amount Vesting period Average Exercise Price [Roll Forward] Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Weighted Average Grant Date Fair Value [Roll Forward] Number of additional shares approved for grant (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized Cliff Vest After Three Years [Member] Share-based Payment Arrangement, Tranche Two [Member] Closing price (in dollars per share) Share Price Share Based Compensation [Abstract] Share-based Payment Arrangement, Noncash Expense [Abstract] Share based compensation Share-based Payment Arrangement, Noncash Expense Forfeited (in dollars per share) Exercised (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Outstanding, beginning balance (in dollars per share) Outstanding, ending balance (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Number of Shares [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Vested (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Information regarding options exercised [Abstract] Granted (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Outstanding, ending balance (in shares) Outstanding, beginning balance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Granted (in shares) Restricted stock and Performance stock units granted (in shares) Vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Expired (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period Exercisable, period end (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Exercisable, period end (in shares) Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period Intrinsic value Weighted-Average Remaining Contractual Term (Years) [Abstract] Outstanding, beginning balance (in shares) Outstanding, ending balance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Vested and expected to vest, period end (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price Outstanding, ending balance (in dollars per share) Outstanding, beginning balance (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Outstanding, aggregate intrinsic value Number of Shares [Roll Forward] Vested and expected to vest, aggregate intrinsic value Vested and expected to vest, period end (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number Equity Award [Domain] Share based compensation withholding obligation, common stock (in shares) Short-term lease cost Condensed Consolidated Statements of Financial Condition [Abstract] Condensed Consolidated Statements of Comprehensive Income [Abstract] Statement [Table] Statement [Line Items] Condensed Consolidated Statements of Cash Flows [Abstract] Equity Components [Axis] Condensed Consolidated Statements of Shareholders' Equity [Abstract] Exercised (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Number of shares authorized for repurchase (in shares) Stock Repurchase Program, Number of Shares Authorized to be Repurchased Issuance of shares of common stock (in shares) Share based compensation, common stock (in shares) Repurchase of common stock Stock repurchased Issuance of common stock Stock Issued During Period, Value, New Issues Share based compensation Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture Stock repurchased (in shares) Repurchase of shares of common stock (in shares) Total shareholders' equity Total Shareholders' Equity Balance at beginning of period Balances at end of period Shareholders' Equity and Earnings Per Common Share Stockholders' Equity Note Disclosure [Text Block] Shareholders' Equity Shareholders' Equity and Earnings Per Common Share [Abstract] Subordinated debt Summary of Investment Holdings [Line Items] Cash paid during the period for Supplemental Cash Flow Information [Abstract] Tier 1 capital to risk-weighted assets [Abstract] Banking Regulation, Tier One Risk-Based Capital [Abstract] Actual, Ratio Minimum for Well-Capitalized Institutions, Ratio Banking Regulation, Tier One Leverage Capital Ratio, Well Capitalized, Minimum Minimum for Adequately Capitalized Institutions, Amount Banking Regulation, Tier One Risk-Based Capital, Capital Adequacy, Minimum Minimum for Adequately Capitalized Institutions, Ratio Banking Regulation, Tier One Leverage Capital Ratio, Capital Adequacy, Minimum Actual, Amount Banking Regulation, Tier One Risk-Based Capital, Actual Tier 1 capital to average assets [Abstract] Minimum for Well-Capitalized Institutions, Ratio Banking Regulation, Tier One Risk-Based Capital Ratio, Well Capitalized, Minimum Minimum for Adequately Capitalized Institutions, Amount Banking Regulation, Tier One Leverage Capital, Capital Adequacy, Minimum Minimum for Well-Capitalized Institutions, Amount Minimum for Adequately Capitalized Institutions, Ratio Banking Regulation, Tier One Risk-Based Capital Ratio, Capital Adequacy, Minimum Actual, Ratio Banking Regulation, Tier One Leverage Capital Ratio, Actual Minimum for Well-Capitalized Institutions, Amount Banking Regulation, Tier One Risk-Based Capital, Well Capitalized, Minimum Tier 1 capital Banking Regulation, Tier One Leverage Capital, Actual Deposits with stated maturity Trading Activity [Axis] Trading Activity, by Type [Domain] Transfers to other real estate and repossessed assets Financial Instruments [Domain] Troubled Debt Restructurings Trust Preferred [Member] Type of Adoption [Domain] Accounting Standards Update [Domain] Unfunded Loan Commitments [Member] Unfunded Loan Commitment [Member] Subjective Allocation [Member] Unallocated Financing Receivables [Member] Unrealized loss on derivative instrument to be reclassified into earnings Unrealized Gain (Loss) on Derivatives Gross unrecognized tax benefits Commercial Loan Portfolio with Greater Potential Risk Unusual or Infrequent Item, or Both [Domain] Unusual or Infrequent Item, or Both [Line Items] Unusual or Infrequent Item, or Both [Axis] Unusual or Infrequent Item, or Both [Table] U.S. Agency [Member] Obligations of States and Political Subdivisions [Member] Vesting [Axis] Vesting [Domain] Valuation Technique [Axis] Valuation Technique [Domain] Variable lease cost Variable Income Interest Rate [Member] Weighted average shares outstanding for calculation of diluted earnings per share (in shares) Weighted Average Number Diluted Shares Outstanding Adjustment Weighted average shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic Counterparty Name [Axis] Consolidated Entities [Domain] Consolidated Entities [Axis] Cumulative Change, Adjusted Balance [Member] Cumulative Effect, Period of Adoption, Adjusted Balance [Member] Cumulative Effect, Period of Adoption [Domain] Impact of Adoption [Member] Cumulative Change, Adjustment [Member] Cumulative Effect, Period of Adoption, Adjustment [Member] Cumulative Effect, Period of Adoption [Axis] Directors [Member] Hotel [Member] Multifamily [Member] Customer [Axis] Maximum [Member] Minimum [Member] Mortgage Loans on Real Estate, Loan Type [Domain] Mortgage Loans on Real Estate, Loan Type [Axis] Customer [Domain] Products and Services [Domain] Products and Services [Axis] Impact, Adjustment [Member] Revision of Prior Period, Accounting Standards Update, Adjustment [Member] Statistical Measurement [Domain] Statistical Measurement [Axis] Counterparty Name [Domain] Revision of Prior Period [Domain] As Reported [Member] Revision of Prior Period [Axis] Previously Reported [Member] Relationship to Entity [Domain] Title of Individual [Axis] Weighted Average [Member] Cover [Abstract] Document Type Document Quarterly Report Document Transition Report Entity Interactive Data Current Amendment Flag Document Fiscal Year Focus Document Fiscal Period Focus Document Period End Date Entity Registrant Name Entity Central Index Key Entity File Number Entity Tax Identification Number Entity Incorporation, State or Country Code Current Fiscal Year End Date Entity Current Reporting Status Entity Shell Company Entity Filer Category Entity Small Business Entity Emerging Growth Company Entity Address, Address Line One Entity Address, City or Town Entity Address, State or Province Entity Address, Postal Zip Code City Area Code Local Phone Number Title of 12(b) Security Trading Symbol Security Exchange Name Entity Common Stock, Shares Outstanding The number of real estate assets financed by the entity sold during the period. Number of Real Estate Assets Sold Number of real estate assets sold during the period The percentage of the entity's revenue excluded from the scope of ASU 2014-09. Percentage of Revenue Excluded from ASU 2014-09 Percentage of revenues excluded from ASC Topic 606 Single retail external customer or group of external retail customers. Customer, Retail [Member] Retail [Member] Single external business customer or group of external customers. Customer, Business [Member] Business [Member] Income classified as other excluding interest income. Noninterest Income, Other Operating Income, Other Other Interchange income primarily includes debit card interchange and network revenues. Interchange Income [Member] Interchange Income [Member] Revenues are earned on depository accounts for commercial and retail customers and include fees for transaction-based, account maintenance and overdraft services. Service Charges on Deposits [Member] Service Charges on Deposit Accounts [Member] Revenues are earned on depository accounts for commercial and retail customers and include fees for transaction-based, account maintenance services. Account Service Charges [Member] Account Service Charges [Member] Transaction-based fees, which includes services such as ATM use fees, stop payment charges and ACH fees are recognized at the time the transaction is executed as that is the time we fulfill our customer's request. Account maintenance fees, which includes monthly maintenance services are earned over the course of a month representing the period over which the performance obligation is satisfied. Other Deposit Related Income [Member] Other Deposit Related Income [Member] Other deposit related income. Other [Member] Other [Member] Transaction-based fees, which includes services such as ATM use fees. ATM Fees [Member] ATM Fees [Member] Revenues are earned on depository accounts for commercial and retail customers and include fees for overdraft services. Overdraft Fees [Member] Overdraft Fees [Member] Investment and insurance commissions include fees and commissions from asset management, custody, recordkeeping, investment advisory and other services provided to our customers. Revenue is recognized on an accrual basis at the time the services are performed and are generally based on either the market value of the assets managed or the services provided. Investment and Insurance Commissions [Member] Investment and Insurance Commissions [Member] Transaction-based fees, which includes services such as ATM use fees, stop payment charges and ACH fees are recognized at the time the transaction is executed as that is the time we fulfill our customer's request. Transaction Based Revenue [Member] Transaction Based Revenue [Member] Investment and insurance commissions include fees and commissions from asset management, custody, recordkeeping, investment advisory and other services provided to our customers. Asset Management Revenue [Member] Asset Management Revenue [Member] Forward based contracts in which two parties agree to swap periodic payments that are fixed at the outset of the swap contract with variable payments based on a market interest rate (index rate) over a specified period. Interest Rate Swap, Noncommercial [Member] Interest Rate Swap [Member] Refers to purchased options relating to Altitude CD product. Purchased Options [Member] Purchased Options [Member] Refers to written options relating to Altitude CD product. Written Options [Member] Written Options [Member] Mandatory commitments to sell mortgage loans derivative financial instrument. Mandatory Commitments to Sell Mortgage Loans [Member] Mandatory Commitments to Sell Mortgage Loans [Member] Amount of lessee's undiscounted obligation for lease payments for operating lease, due after fourth fiscal year following latest fiscal year. Lessee, Operating Lease, Liability, Payments, Due after Year Four 2026 and thereafter The change in unrealized gains for which a portion of other than temporary impairment has been recognized in earnings before tax and reclassification adjustments of unrealized holding gain (loss) on available-for-sale securities. Other Comprehensive Income (Loss), Available-for-sale Securities, Other Than Temporary Impairment Loss Adjustment, before Reclassification Adjustments and Tax Change in unrealized gains and losses for which a portion of other than temporary impairment has been recognized in earnings Purchase of securities available for sale not yet settled. Purchase of securities available for sale not yet settled Purchase of securities available for sale not yet settled Securitization of certain mortgage loans with Freddie Mac . Securitization of Portfolio Loans Securitization of portfolio loans The net cash inflow or outflow for the (increase) decrease in the beginning and end of period of portfolio loan balances originated net of principal payments. Net (Increase) Decrease of Portfolio Loans, Originated net of Principal Payments Net increase in portfolio loans (loans originated, net of principal payments) Amount of expense related to estimated loss from loan and lease transactions. Provision For Credit Losses Provision for credit losses Tangible personal property used in an office setting. Office [Member] Classification of common stock representing ownership interest in a corporation. VISA Class A Stock [Member] VISA Class A Common Stock [Member] The value of the number of shares held at close of period. Investment Owned, Balance, Shares Value Current value of shares owned Ratio applied to the conversion of one type or class of equity instrument into another type or class of equity instrument. Equity Investment, Conversion Ratio Current conversion ratio Classification of common stock representing ownership interest in a corporation. VISA Class B [Member] VISA Class B Common Stock [Member] Reserve balance as of the reporting date for loss reimbursements on sold mortgage loans. Reserve For Loss Reimbursement On Sold Loans Loss reimbursement reserve on sold mortgage loans Concentration risk in relation to a quantitative amount, which serves as the loans and lease receivable or (denominator) in the equation, this concept represents the concentration percentage derived from the division. Concentration Risk, Loans and Lease Receivable, Percentage % of Total Loans Non interest provision for loss reimbursement on sold loans. Provision for loss reimbursement on sold loans Loss reimbursement on sold loans Loss Reimbursement Obligations [Abstract] Loss Reimbursement Obligations [Abstract] Regulatory Matters [Abstract] The cumulative amount of the subsidiary reporting entity's undistributed earnings or deficit. Retained Earnings Accumulated Deficit Subsidiary Undivided profits A component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. Independent Bank [Member] Independent Bank [Member] Components of regulatory capital [Abstract] Components of regulatory capital [Abstract] Trust preferred securities qualifying as Tier 1 capital. Qualifying Trust Preferred Securities Qualifying trust preferred securities Add (deduct) [Abstract] Add (deduct) [Abstract] The period for current expected credit loss transition method for regulatory purposes. Current Expected Credit Loss Transition Method for Regulatory Purpose Period of transition method for regulatory purposes Current expected credit loss as a components of regulatory capital. Current Expected Credit Loss CECL Allowance for loan losses and allowance for unfunded lending commitments included in total risk-based capital. Allowance For Loan Losses And Unfunded Lending Commitments Limited At Specific Risk Weighted Assets Allowance for credit losses and allowance for unfunded lending commitments limited to 1.25% of total risk-weighted assets Estimated recorded book balance and fair value [Abstract] Estimated recorded book balances and fair values [Abstract] Total amount of reciprocal deposits included in deposits with no stated maturity. Reciprocal Deposits Included in Deposits with No Stated Maturity Reciprocal deposits included in deposits with no stated maturity Total amount of reciprocal deposits included in deposits with stated maturity. Reciprocal Deposits Included In Deposits With Stated Maturity Reciprocal deposits included in deposits with stated maturity For banks and other depository institutions: Fair value disclosure of Interest-bearing deposits in other financial institutions for relatively short periods of time including, for example, certificates of deposits, which are presented separately from cash on the balance sheet, interest-bearing balances with the Federal Reserve Banks. Interest Bearing Deposits With Banks, Fair Value Disclosure Interest bearing deposits This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents all loans held for investment, net of related allowance and loans held-for-sale as presented on the statement of financial position as of the balance sheet date. Net Loans And Loans Held For Sale Fair Value Disclosure Net loans and loans held for sale Amount of all domestic deposit liabilities with no stated maturity. Domestic Deposit Savings No Stated Maturity Deposits with no stated maturity Fair value portion of banks and other depository institutions: Includes cash on hand (currency and coin), cash items in process of collection, noninterest bearing deposits due from other financial institutions (including corporate credit unions), and noninterest bearing balances with the Federal Reserve Banks, Federal Home Loan Banks and central banks. Cash and Due from Banks, Fair Value Disclosure Cash and due from banks Tabular disclosure of components of regulatory capital. Components of regulatory capital [Text Block] Regulatory Capital Aggregate intrinsic value [Abstract] Aggregate Intrinsic Value [Abstract] Total amount of reciprocal deposits . Reciprocal deposits Reciprocal Portfolio segment of the company's total financing receivables related to installment financing receivables. Installment Portfolio Segment [Member] Installment [Member] Expenses incurred relating to the conversion of our core data processing system to a new system hosted by a different vendor. Conversion Related Expense Conversion related expenses Includes amounts charged depositors for: (1) maintenance of their accounts (maintenance charges); (2) failure to maintain specified minimum balances on account; (3) exceeding the number of checks or transactions allowed to be processed in a given period; (4) checks drawn on no minimum balance deposit accounts; (5) withdrawals from nontransaction deposit accounts; (6) closing savings accounts before a specified minimum period of time has elapsed; (7) accounts which have remained inactive for extended periods of time or which have become dormant; (8) checks drawn against insufficient funds that the bank assesses regardless of whether it decides to pay, return or hold the check; (9) issuing stop payment orders; (10) certifying checks. This item does not include penalties assessed on the early withdrawal of time deposits. Depositor Accounts, Fees and Commissions Service charges on deposit accounts Income from servicing real estate mortgages held by others net of any related impairment of capitalized service costs. Mortgage Loan Servicing Income Mortgage loan servicing, net The amount of expenses incurred in the period for data processing services and related costs. Data Processing Data processing Amount of expense related to debit card transactions. Interchange Expense Interchange expense Expenses generally relating to the origination of loans (not subject to capitalization), the collection of loans and maintaining other real estate and repossessed assets. Loan And Collection Loan and collection Represents interchange fees earned on debit card transactions. Interchange Income Interchange income From 700 to 749 credit score as defined by the external credit rating agency, Fair Isaac Corporation (FICO). Element name and standard label in FICO Score [numeric lower end] to [numeric higher end] [Member] format. FICO Score, 700 to 749 [Member] 700 to 749 [Member] Under 500 credit score as defined by the external credit rating agency, Fair Isaac Corporation (FICO). Element name and standard label in FICO Score [numeric lower end] to [numeric higher end] [Member] format. FICO Score, Under 500 [Member] Under 500 [Member] From 500 to 549 credit score as defined by the external credit rating agency, Fair Isaac Corporation (FICO). Element name and standard label in FICO Score [numeric lower end] to [numeric higher end] [Member] format. FICO Score, 500 to 549 [Member] 500 to 549 [Member] From 650 to 699 credit score as defined by the external credit rating agency, Fair Isaac Corporation (FICO). Element name and standard label in FICO Score [numeric lower end] to [numeric higher end] [Member] format. FICO Score, 650 to 699 [Member] 650 to 699 [Member] From 600 to 649 credit score as defined by the external credit rating agency, Fair Isaac Corporation (FICO). Element name and standard label in FICO Score [numeric lower end] to [numeric higher end] [Member] format. FICO Score, 600 to 649 [Member] 600 to 649 [Member] Unknown credit score as defined by the external credit rating agency, Fair Isaac Corporation (FICO). Element name and standard label in FICO Score [numeric lower end] to [numeric higher end] [Member] format. FICO Score, Unknown [Member] Unknown [Member] From 550 to 599 credit score as defined by the external credit rating agency, Fair Isaac Corporation (FICO). Element name and standard label in FICO Score [numeric lower end] to [numeric higher end] [Member] format. FICO Score, 550 to 599 [Member] 550 to 599 [Member] From 750 to 799 credit score as defined by the external credit rating agency, Fair Isaac Corporation (FICO). Element name and standard label in FICO Score [numeric lower end] to [numeric higher end] [Member] format. FICO Score, 750 to 799 [Member] 750 to 799 [Member] Greater than 800 credit score as defined by the external credit rating agency, Fair Isaac Corporation (FICO). Element name and standard label in FICO Score Greater Than [low end numeric value] [Member] or FICO Score Less Than [high end numeric value] [Member] formats. FICO Score, Greater than 800 [Member] 800 and Above [Member] Class of financing receivables related to recreational vehicle lending financing receivables. Recreational Vehicle Lending [Member] Recreational Vehicle Lending [Member] Class of financing receivables related to resort lending financing receivables. Resort Lending [Member] Resort Lending [Member] Class of financing receivables related to other installment financing receivables. Installment Other [Member] Other [Member] Class of financing receivables related to 1-4 family owner occupied non-jumbo financing receivables. Family 1 4, Owner Occupied, Non-jumbo [Member] 1-4 Family Owner Occupied - Non-jumbo [Member] Class of financing receivables related to boat lending financing receivables. Boat Lending [Member] Boat Lending [Member] Class of financing receivables related to 1-4 family owner occupied jumbo financing receivables. Family 1 4, Owner Occupied, Jumbo [Member] 1-4 Family Owner Occupied - Jumbo [Member] Class of financing receivables related to 1-4 family second lien financing receivables. Family 1 4, Second Lien [Member] 1-4 Family - 2nd Lien [Member] Credit Scores by Loan Class [Abstract] Summary of Credit Scores by Loan Class [Abstract] Amount, before allowance for credit loss, of accrued interest on financing receivable originated more than five years prior to current fiscal year. Financing Receivable, Accrued Interest, More than Five Years before Current Fiscal Year Accrued interest, Prior Amount, before allowance for credit loss, of accrued interest on financing receivable originated in current fiscal year. Financing Receivable, Accrued Interest, Current Fiscal Year Accrued interest, 2021 Amount, before allowance for credit loss, of accrued interest on financing receivable that can be withdrawn, repaid and redrawn. Financing Receivable, Accrued Interest, Revolving Accrued interest, Revolving Amount, before allowance for credit loss, of accrued interest on financing receivable originated two years prior to current fiscal year. Financing Receivable, Accrued Interest, Two Years before Current Fiscal Year Accrued interest, 2019 Amount, before allowance for credit loss, of accrued interest on financing receivable originated three years prior to current fiscal year. Financing Receivable, Accrued Interest, Three Years before Current Fiscal Year Accrued interest, 2018 Amount, before allowance for credit loss, of accrued interest on financing receivable originated four years prior to current fiscal year. Financing Receivable, Accrued Interest, Four Years before Current Fiscal Year Accrued interest, 2017 Amount, before allowance for credit loss, of accrued interest on financing receivable originated in fiscal year prior to current fiscal year. Financing Receivable, Accrued Interest, Fiscal Year before Current Fiscal Year Accrued interest, 2020 Class of financing receivables related to 1-4 family non-owner occupied financing receivables. Family 1 4, Non-owner Occupied [Member] 1-4 Non-owner Occupied [Member] 1-4 Family Non-owner Occupied [Member] Non performing loans [Abstract] Non performing loans [Abstract] Amount of financing receivable on nonaccrual status with allowance for credit loss. Financing Receivable, Nonaccrual, With Allowance for Credit Loss Non-Accrual with an Allowance for Credit Loss Class of financing receivables related to commercial and industrial financing receivables. Commercial and Industrial [Member] Commercial and Industrial [Member] Loan to finance the purchase of commercial real estate, including but not limited to, land or building. Commercial Real Estate Loan [Member] Commercial Real Estate [Member] Amount of financing receivables guaranteed by US Government Authorities. Financing Receivable, Government Guaranteed Loans Government guaranteed loans excluded from non-performing loans Tabular disclosure of the summary of restricted stock and performance stock units ("PSU") granted pursuant to the entity's share-based payment arrangement. Share-based Payment Arrangement, Restricted Stock and Performance Stock Units Granted [Table Text Block] Restricted Stock and Performance Stock Units Granted Reclassification Adjustment, Accumulated Other Comprehensive Income [Abstract] Reclassifications out of AOCIL [Abstract] Effect of derivative financial instruments on the condensed consolidated financial statements of operations [Abstract] Effect of derivative financial instruments on the condensed consolidated financial statements of operations [Abstract] Primary financial statement caption encompassing interest expense and fees on loans. Interest Expense and Fees on Loans [Member] Interest and Fees on Loans [Member] Primary financial statement caption encompassing interest expense on securities available for sale. Interest Expense on Securities Available for Sale [Member] Interest on Securities Available for Sale - Tax-exempt [Member] Gain on mortgage loans. Net Mortgage Loan Gains [Member] Net Gains on Mortgage Loans [Member] Shares that an entity has not yet issued because the agreed-upon consideration, such as employee services, has not yet been received and shares or units awarded to employees for meeting certain performance targets. Non Vested Restricted Stock and Performance Stock Units [Member] Non-vested Restricted Stock and PSU's [Member] Derivative financial instruments according to type of hedge designation. Derivative Financial Instruments According To Type Of Hedge Designation [Table Text Block] Derivative Financial Instruments According to Type of Hedge Designation Tabular disclosure of average recorded investment in and interest income earned on impaired loans by class. Average recorded investment in and interest income earned on impaired loans by class [Table Text Block] Average Recorded Investment in and Interest Income Earned on Impaired Loans by Class Tabular disclosure of amortized cost of collateral-dependent loans of different classes.. Amortized Cost of Collateral-dependent Loans by Class [Table Text Block] Amortized Cost of Collateral-dependent Loans by Class Financing receivables that have been classified as troubled debt restructurings during the period. Troubled Debt Restructurings During Period [Table Text Block] Troubled Debt Restructuring During the Period Non-TDR Loan Modifications and Paycheck Protection Program ("PPP") due to COVID-19 [Abstract] Non-TDR Loan Modifications and Paycheck Protection Program ("PPP") due to COVID-19 [Abstract] Number of financing receivables that have been modified under COVID-19. Financing Receivable, Modifications, Other than Troubled Debt Restructurings, Number of Contracts Number of loans with Covid 19 Accommodations The Economic Aid to Hard-Hit Small Businesses, Nonprofits, and Venues Act (''Economic Aid Act'') was signed into law which allocates an additional funding for the PPP ("Round 2"). Economic Aid Act Two [Member] Closed and Outstanding - Round 2 Loans [Member] Amount of remaining unaccreted net fees. Remaining Unaccreted Net Fees Unaccreted net fees remaining at period end The subsequent accommodation to the novel coronavirus (COVID-19) Categorized as a pandemic by the World Health Organization. COVID-19, Subsequent Accommodation [Member] COVID-19 Subsequent Accommodation [Member] Amount of financing receivable modified by other than troubled debt restructurings. Financing Receivable, Modifications by Other Than Troubled Debt Restructurings, Loans Outstanding Non-TDR loan modifications, portfolio loans outstanding Number of outstanding loans. Financing Receivable, Number of Loans Outstanding Number of outstanding loans Percentage of total loans that have been modified by other than troubled debt restructurings. Financing Receivable, Modifications by Other than Troubled Debt Restructuring, Percentage of Loans Modified Percentage of total loans, COVID-19 Accommodations Represents the term of loan modification for suspension of loan payments period in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Includes, but not limited to, weeks in a year or quarter. Loan Modification, Term of Suspended Payments Suspended payments period for Retail loans Represents the term of loan modification for interest only period in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Includes, but not limited to, weeks in a year or quarter. Loan Modification, Term of Interest Only Period Interest only period for Commercial loans Mortgage loans serviced for others related to installment financing receivables. Mortgage Loans Serviced For Others [Member] Mortgage Loans Serviced for Others [Member] Small Business Administration (SBA), CARES Act, Paycheck Protection Program loans. Small Business Administration (SBA), CARES Act, Paycheck Protection Program [Member] Paycheck Protection Program [Member] The novel coronavirus (COVID-19) Categorized as a pandemic by the World Health Organization. COVID-19 [Member] COVID-19 Accommodations [Member] First round of the Small Business Administration (SBA), CARES Act, Paycheck Protection Program loans. Small Business Administration (SBA), CARES Act, Paycheck Protection Program, Round One [Member] Closed and Outstanding - Round 1 Loans [Member] Represents the collateral dependent loans mortgage and installment loans. Collateral Dependent Loans Mortgage and Installment [Member] Collateral Dependent Loans Mortgage and Installment [Member] Represents the collateral dependent loans. Collateral Dependent Loans [Member] Collateral Dependent Loans Commercial [Member] Collateral Dependent Loans [Member] Refers to the capitalized mortgage loan servicing rights. Capitalized Mortgage Loan Servicing Rights [Member] Capitalized Mortgage Loan Servicing Rights [Member] Mortgage Loan Servicing, Net [Member] Unobservable Inputs Weighted Average [Abstract] Ranges and Weighted Average [Abstract] Value of input used to measure investment in impaired loans measured at fair value. Impaired Loans, Measurement Input Impaired loans measurement input Value of input used to measure real estate owned by financial institution by financial institution. Other Real Estate, Measurement Input Other real estate measurement input Fair value amount of other real estate taken in settlement of troubled loans through surrender or foreclosure. Real Estate, Other Other real estate fair value Amount of investment in collateral dependent loans measured at fair value. Collateral Dependent Loans, Fair Value Collateral dependent loans fair value Represents the present value of net servicing revenue used to measure fair value. Present Value of Net Servicing Revenue [Member] Present Value of Net Servicing Revenue [Member] Represents the sales comparison approach to measure fair value. Sales comparison approach [Member] Sales Comparison Approach [Member] Represents the other real estate mortgage. Other Real Estate Mortgage [Member] Other Real Estate Mortgage [Member] Measurement input using float rate to determine fair value. Measurement Input, Float Rate [Member] Float Rate [Member] Measurement input using ancillary income to determine present value of future cash flows. Measurement Input, Ancillary Income [Member] Ancillary Income [Member] Measurement input using cost to service to determine present value of future cash flows. Measurement Input, Cost to Service Approach [Member] Cost to Service [Member] The valuation allowance on loans measured for impairment, using the fair value of collaterals. Collateral dependent loans, valuation allowance Class of financing receivables related to 1-4 family financing receivables. Family 1 4 [Member] Mortgage Loans [Member] Carrying amount of other real estate that are impaired, net reserves. Other Real Estate Impaired, Net Reserves Other real estate, carrying amount Amount of unrealized gain (loss) on loans held for sale measured at fair value with change in fair value recognized in net income. Loans Held-for-sale, Unrealized Gain Loss Loans held for sale Amount of unrealized gain (loss) on capitalized servicing rights measured at fair value with change in fair value recognized in net income. Servicing Asset, Unrealized Gain Loss Capitalized mortgage loan servicing rights, net gains (losses) Loans which are measured for impairment using the fair value of collaterals. Collateral dependent loans, carrying amount Amount of available-for-sale debt securities at fair value that do not have a single maturity date and which the entity has decided to disclose separately rather than allocating the fair value over several maturity groupings. Private label mortgage backed, Debt Maturities, without Single Maturity Date, Fair Value Private label mortgage-backed Amount of available-for-sale debt securities at fair value that do not have a single maturity date and which the entity has decided to disclose separately rather than allocating the fair value over several maturity groupings. Other Asset Backed Debt Maturities Without Single Maturity Date Fair Value Other asset backed Amount of available-for-sale debt securities at fair value that do not have a single maturity date and which the entity has decided to disclose separately rather than allocating the fair value over several maturity groupings. Government Agency Commercial mortgage backed, Debt Maturities, without Single Maturity Date, Fair Value U.S. agency commercial mortgage-backed Amount of available-for-sale debt securities at cost, net of adjustments, that do not have a single maturity date and which the entity has decided to disclose separately rather than allocating the cost over several maturity groupings. Adjustments include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings (less any cumulative-effect adjustments, as defined) and fair value hedge accounting adjustments. Government Agency, Commercial mortgage backed, without Single Maturity Date, Amortized Cost Basis U.S. agency commercial mortgage-backed Amount of available-for-sale debt securities at cost, net of adjustments, that do not have a single maturity date and which the entity has decided to disclose separately rather than allocating the cost over several maturity groupings. Adjustments include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings (less any cumulative-effect adjustments, as defined) and fair value hedge accounting adjustments. Private label mortgage backed, without Single Maturity Date, Amortized Cost Basis Private label mortgage-backed Amount of available-for-sale debt securities at cost, net of adjustments, that do not have a single maturity date and which the entity has decided to disclose separately rather than allocating the cost over several maturity groupings. Adjustments include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings (less any cumulative-effect adjustments, as defined) and fair value hedge accounting adjustments. Other Asset Backed Without Single Maturity Date Amortized Cost Basis Other asset backed Refers to number of weighted average performance stock units. Weighted Average Number Of Performance Shares Stock Performance share units (in shares) Number of stock units for deferred compensation plan for non employee directors determined by relating the portion of time within a reporting period that restricted shares have been outstanding to the total time in that period. Stock Units For Deferred Compensation Plan For Non Employee Directors Stock units for deferred compensation plan for non-employee directors (in shares) Earnings Per Share, Antidilutive Disclosures [Abstract] Antidilutive Securities [Abstract] Refers to the other real estate of loan portfolios. Other Real Estate [Member] Other Real Estate [Member] Capitalized mortgage loan servicing rights, fair value disclosure. Capitalized Mortgage Loan Servicing Rights Fair Value Disclosure. Capitalized mortgage loan servicing rights Class of assets, impaired loans. Impaired Loans [Member] Impaired Loans [Member] Amount of disproportionate tax effects from securities available for sale. Accumulated Other Comprehensive Income Loss Disproportionate Tax Effects From Securities Available For Sale [Member] Disproportionate Tax Effects from Securities Available for Sale [Member] Tabular disclosure of lessee's right of use assets and lease liabilities. Lessee, Operating Lease, Balance Sheet Information [Table Text Block] Supplemental Balance Sheet Information Related to Operating Leases Amount of allowance for credit losses on unfunded loan commitments. Allowance For Credit Losses and Unfunded Loan Commitments Allowance for credit losses on unfunded lending commitments New Accounting Standards and Pronouncements [Abstract] New Accounting Standards [Abstract] Allowance for loan losses forecast period in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Allowance for Loan Losses Forecast Period Allowance for loan losses forecast period The fair value of non-rated trust preferred securities at the end of the period. Non Rated Trust Preferred Securities Fair Value Fair value of non-rated trust preferred securities The number of securities at period end that are not rated for investment quality by an external rating agency. Number Of Securities Not Externally Rated Number of securities not rated The number of securities rated as investment grade by rating agency. Number Of Securities Rated As Investment Grade Number of issues rated as investment grade The amortized cost of non-rated trust preferred securities at the end of the period. Non Rated Trust Preferred Securities Amortized Cost Non-rated securities, amortized cost Stock Repurchase Program [Abstract] Share Repurchase Plan [Abstract] Loan Ratings by Loan Class [Abstract] Summary of Loan Ratings by Loan Class [Abstract] Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. This amount includes accrued interest. Excludes loans and leases covered under loss sharing agreements. Loans And Leases Receivable Recorded Investment Total recorded investment Loans Total recorded investment These loans are generally referred to as "non-watch" commercial credits that include very high or exceptional credit fundamentals through acceptable credit fundamentals. Non-Watch 1-6 [Member] Non-Watch 1-6 [Member] These loans are generally referred to as "watch" commercial credits. This rating includes loans to borrowers that exhibit potential credit weakness or downward trends. If not checked or cured these trends could weaken our asset or credit position. While potentially weak, no loss of principle or interest is envisioned with these ratings. Watch 7-8 [Member] Watch 7-8 [Member] These loans are generally referred to as "substandard - non-accrual" and "doubtful" commercial credits. This rating includes loans to borrowers with weaknesses that make collection of debt in full, on the basis of current facts, conditions and values at best questionable and at worst improbable. All of these loans are placed in non-accrual. Non Accrual 10-11 [Member] Non-Accrual 10-11 [Member] These loans are generally referred to as "substandard accruing" commercial credits. This rating includes loans to borrowers that exhibit a well-defined weakness where payment default is probable and loss is possible if deficiencies are not corrected. Generally, loans with this rating are considered collectible as to both principle and interest primarily due to collateral coverage. Substandard Accrual 9 [Member] Substandard Accrual 9 [Member] Average recorded investment in and interest income earned on impaired loans by class [Abstract] Average recorded investment in and interest income earned on impaired loans by class [Abstract] Troubled Debt Restructuring [Abstract] Troubled Debt Restructuring [Abstract] The period when loan payment is considered to be in default. Past due period for modified loans Past due period for modified loans Period of time the maturity date of a troubled debt restructured loan is extended for in certain circumstances. Financing Receivable Modifications Of Maturity Date, Extension Modifications involving extension of maturity date, period range in certain circumstances Disclosure of troubled debt restructurings. Troubled debt restructuring Troubled debt restructuring Specific allowance for loan and lease losses on receivable financings that are classified as troubled debt restructurings. Troubled Debt Restructuring Loans and Leases Receivable Specific allowance Troubled debt restructuring, reserve Period of time an interest rate is modified for in a troubled debt restructuring. Financing Receivable Modifications Of Stated Interest Rate Period Modification of stated interest rate of loans, range of period Period of time the maturity date of a troubled debt restructured loan is extended for. Financing Receivable Modifications Of Maturity Date Modifications involving extension of maturity date, period range The number of consecutive timely payments required to be received for non-accrual loans to be removed from inclusion with the non-performing troubled debt restructurings. Number of Consecutive Timely Payments Required Number of consecutive timely payments required Amount of direct write-downs of receivables charged against the allowance for doubtful accounts due to TDR's that subsequently defaulted. Allowance For Doubtful Accounts Receivable Charge Offs Due To T D R Charge-offs on TDRs that subsequently defaulted Period of time an interest rate is modified for in a troubled debt restructuring in certain circumstances. Financing Receivable Modifications Of Stated Interest Rate Period, Extension Modification of stated interest rate of loans, range of period in certain circumstances Loans classified as troubled debt restructurings [Abstract] Loans classified as troubled debt restructurings [Abstract] Impaired loans with an allocated allowance for loan losses [Abstract] Impaired loans with an allocated ACL [Abstract] Troubled debt restructured with allowance based on the collateral Troubled Debt Restructuring Allowances Based on Collateral TDR - allowance based on collateral Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses. Impaired Financing Receivables Total impaired loans Impaired loan with no allocated allowance [Abstract] Impaired loans with no allocated ACL [Abstract] Amount of troubled debt restructurings. Troubled Debt Restructuring, Amount Troubled debt restructurings ("TDR") Non-troubled debt restructured, allowance based on collateral. Non Troubled Debt Restructuring Allowance Based on Collateral Non - TDR - allowance based on collateral Amount of allowance for loan losses allocated [Abstract] Amount of ACL allocated [Abstract] Troubled debt restructured allowance based on collateral. Troubled Debt Restructuring Allowance Based on Collateral TDR - allowance based on collateral Total amount of allowance for loan losses allocated Allowance For Loan Losses Allocated Total amount of ACL allocated Non-troubled debt restructured allowance based on collateral. Non Troubled Debt Restructuring Allowances Based On Collateral Non - TDR - allowance based on collateral Troubled debt restructured allowance based on present value cash flow. Troubled Debt Restructuring Allowance Based on Present Value Cash Flow TDR - allowance based on present value cash flow Troubled debt restructured, allowance based on present value cash flow. Troubled Debt Restructuring Allowances Based on Present Value Cash Flow TDR - allowance based on present value cash flow Amount of unpaid principal balance of impaired financing receivables that are not trouble debt restructured for which there is no related allowance for credit losses. Non Troubled Debt Restructuring Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance Non - TDR The entity's equity-based compensation arrangement plan. Long-Term Incentive Plan [Member] Long-Term Incentive Plan [Member] Share issued to directors in place of quarterly cash retainer's fees during the period. Shares issues in place of retainer fees Shares issues as retainer fees (in shares) The period over which the performance feature of performance stock units is determined based on the entity's total shareholder return starting on the grant date to the total shareholder return over that period for a banking index of the entity's peers, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Performance Shares, Performance Feature Period of Comparison Performance feature comparison period The credited percentage of the current value of shares issued on a deferred basis. Shares Issued on Deferral Basis, Credited Percentage of Current Value Shares issued on deferral basis credited percentage of current value Person serving on the board of directors (who collectively have responsibility for governing the entity), but are non employees. Non Employee Directors [Member] Non-Employee Directors [Member] Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized after the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. Finite-Lived Intangible Assets, Amortization Expense, after Year Four 2026 and thereafter Collateral-dependent Loans by Class [Abstract] Collateral-dependent Loans by Class [Abstract] Other loan represents as other collateral loan. Other Collateral Loan [Member] Other Loan [Member] Represents collateral dependent loan. Collateral Dependent Loan [Member] Collateral Dependent Loans [Member] Aging analysis of loans by class [Abstract] Aging analysis of loans by class [Abstract] Accrued total interest included in recorded investment in impaired loans at period end. Accrued Interest, Impaired Loans Accrued interest included in recorded investment Amount of allowance for credit losses related to recorded investment for which there is no related allowance for credit losses. Impaired Financing Receivable Related Allowance With No Related Allowance Related Allowance, with no related ACL recorded Fair Value Assets Measured On Recurring Basis Gain Loss Realized And Unrealized [Abstract] Total losses realized and unrealized [Abstract] Allowance for loan losses [Abstract] ACL [Abstract] A valuation allowance for certain loans acquired in transfer not accounted for as debt securities that are expected to be uncollectible. Financing Receivable Allowance For Credit Losses, Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Loans acquired with deteriorated credit quality Additions (deductions) [Abstract] Additions (deductions) [Abstract] Loan ratings/credit scores by loan class [Abstract] Loan ratings/credit scores by loan class [Abstract] Represents loans categorized as unknown when the FICO credit score is not known. Credit Score Unknown Unknown Represents the FICO score of loans by category. Credit score 700 to 749 700-749 Represents the FICO score of loans by category. Credit score Under 500 Under 500 Represents the FICO score of loans by category. Credit score 650 to 699 650-699 Represents the FICO score of loans by category. Credit score 550 to 599 550-599 Total recorded investments by credit score. Credit score by investment Total Represents the FICO score of loans by category. Eight hundreds and above 800 and above Represents the FICO score of loans by category. Credit score 500 to 549 500-549 Represents the FICO score of loans by category. Credit score 750 to 799 750-799 Represents the FICO score of loans by category. Credit score 600 to 649 600-649 Loan to purchase or refinance residential real estate (for example, but not limited to, a home) in which the interest rate is and the amount of each payment remain constant throughout the life of the loan and loans in which the interest rate is periodically adjusted according to changes in a specified reference rate. Fixed Rate Residential Mortgage and Adjustable Rate Residential Mortgage [Member] Residential Fixed and Adjustable Rate Mortgage [Member] Refers to Mortgage loans serviced for Freddie Mac. Freddie Mac [Member] Represents the difference between the aggregate fair value and aggregate remaining contractual principal balance for loans held for sale Difference In Aggregate Fair Value And Aggregate Remaining Contractual Principal Balance For Loans Held For Sale [Table Text Block] Aggregate Fair Value and Aggregate Remaining Contractual Principal Balance for Loans Held for Sale