Amendment Flag Current Fiscal Year End Date Document Period End Date Entity [Domain] Entity [Domain] Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Current Reporting Status Entity Filer Category Entity Public Float Entity Registrant Name Entity Central Index Key Entity Common Stock, Shares Outstanding Document Fiscal Year Focus Document Fiscal Period Focus Legal Entity [Axis] Legal Entity [Axis] Document Type AM Best Rating A+ [Member] AM Best, A+ Rating [Member] AM Best Rating, A Ratings [Member] AM Best Rating, B Rating [Member] AM Best, B Rating [Member] AM Best Rating, B+ Rating [Member] AM Best Rating, A- Rating [Member] Award Type [Axis] Number of securities with market fair value less than amortized cost ACCOUNTING POLICIES [Abstract] Accounts, Notes, Loans and Financing Receivable [Line Items] Unrealized Gains (Losses) on Securities Available For Sale [Member] Accumulated Net Investment Gain (Loss) Attributable to Parent [Member] Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated depreciation and amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment ACCUMULATED OTHER COMPREHENSIVE LOSS [Abstract] Accumulated Other Comprehensive Loss [Member] OTTI recognized in accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Other than Temporary Impairment, Not Credit Loss, Net of Tax, Available-for-sale, Debt Securities Accumulated other comprehensive loss Accumulated other comprehensive loss for regulatory purposes Share based compensation withholding obligation Adjustments Related to Tax Withholding for Share-based Compensation ADJUSTMENTS TO RECONCILE NET INCOME TO NET CASH FROM OPERATING ACTIVITIES ADJUSTMENTS TO RECONCILE NET INCOME TO NET CASH FROM (USED) IN OPERATING ACTIVITIES Adjustments for New Accounting Pronouncements [Axis] Total Adjustments Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities Total FHLB advances, Amount Advances from the FHLB Advertising Total compensation expense (recovery) recognized Allocated Share-based Compensation Expense Increase (decrease) in allowance for loan losses Allowance for loan losses and recorded investment in loans by portfolio segment Amortization Amortization of Mortgage Servicing Rights (MSRs) Intangible amortization expense Amortization of Intangible Assets Antidilutive Securities [Axis] Antidilutive shares excluded from computation of diluted loss per share (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities, Name [Domain] Other real estate, additional charge Impairment charges recognized [Abstract] Other Asset Backed [Member] Assets [Abstract] Assets, Fair Value Disclosure [Abstract] Total Assets Total assets ASSETS ASSETS [Abstract] Assets [Abstract] Maturing after five years but within ten years Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Amortized Cost Basis Total, Fair value Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value Securities available for sale Fair value Securities available for sale Less Than Twelve Months, Fair Value Maturing after one year but within five years Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract] Unrealized gains Twelve Months or More, Unrealized Losses Maturing after ten years Twelve Months or More, Fair Value Available-for-sale Securities, Amortized Cost Basis [Abstract] Maturing after one year but within five years Available-for-sale Securities, Debt Maturities, Year Two Through Five, Amortized Cost Basis Total, Unrealized Losses Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss Unrealized losses Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract] Maturing after ten years Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis Amortized cost Available-for-sale Securities, Amortized Cost Basis Maturing after five years but within ten years Less Than Twelve Months, Unrealized Losses Available-for-sale securities, debt maturities, amortized cost basis Available-for-sale Debt Securities, Amortized Cost Basis Total available-for-sale securities fair value Available-for-sale Securities, Debt Maturities, Single Maturity Date Gain and losses realized on sale of securities available for sale [Abstract] Losses Maturing within one year U.S. agency residential mortgage-backed Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] U.S. agency residential mortgage backed Maturing within one year Available-for-sale Securities, Debt Maturities, Next Twelve Months, Amortized Cost Basis Proceeds Realized gains Balance Sheet Location [Axis] Balance Sheet Location [Domain] Bank-owned life insurance Bank owned life insurance Bank Owned Life Insurance Income REGULATORY MATTERS [Abstract] Buildings [Member] Building [Member] Counterparty Name [Axis] Total risk-based capital Capital Total capital to risk-weighted assets [Abstract] Minimum for Adequately Capitalized Institutions, Ratio Actual, Ratio Capital to Risk Weighted Assets Minimum for Adequately Capitalized Institutions, Amount Minimum for Well Capitalized Institutions, Amount Minimum for Well-Capitalized Institutions, Ratio Recorded Book Balance [Member] Reported Value Measurement [Member] Cash and Cash Equivalents at Beginning of Year Cash and Cash Equivalents at End of Year Cash and Cash Equivalents Cash and Cash Equivalents, at Carrying Value STATEMENTS OF CASH FLOWS Cash and due from banks Net Increase (Decrease) in Cash and Cash Equivalents Cash and Cash Equivalents, Period Increase (Decrease) Cash and due from banks Cash and Cash Equivalents, Fair Value Disclosure Cash Flow Hedge [Member] Cash Flow Hedging [Member] Chief Executive Officer [Member] Class of Stock [Line Items] Stock Reserved [Line Items] Class of Stock [Domain] Accounts Receivables Due to Mepco [Member] Commercial [Member] Commercial [Member] U.S. Agency Commercial Mortgage-Backed [Member] Commercial and Industrial [Member] Commercial and Industrial [Member] COMMITMENTS AND CONTINGENT LIABILITIES Commitments and Contingencies Disclosure [Text Block] Commitments and contingent liabilities Commitments to Extend Credit [Member] COMMITMENTS AND CONTINGENT LIABILITIES [Abstract] Declared (in dollars per share) Common Stock [Member] Common stock, shares issued (in shares) Common stock, par value (in dollars per share) Common Stock Subject to Mandatory Redemption [Member] Common stock, shares authorized (in shares) Common stock, no par value, 500,000,000 shares authorized; issued and outstanding: 21,258,092 shares at December 31, 2016 and 22,251,373 shares at December 31, 2015 Common stock Common stock reserved for issuance (in shares) Common Stock, Capital Shares Reserved for Future Issuance Common stock, shares outstanding (in shares) Common Stock [Abstract] Communications Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] Components of deferred tax assets and liabilities [Abstract] ACCUMULATED OTHER COMPREHENSIVE LOSS Comprehensive Income (Loss) Note [Text Block] Comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent COMPREHENSIVE INCOME Concentration Risk Type [Axis] CONCENTRATIONS OF CREDIT RISK Concentration Risk Disclosure [Text Block] Concentration Risk [Line Items] Concentration Risk [Table] Concentration Risk Type [Domain] INDEPENDENT BANK CORPORATION (PARENT COMPANY ONLY) FINANCIAL INFORMATION Condensed Financial Information of Parent Company Only Disclosure [Text Block] Condensed Financial Statements, Captions [Line Items] INDEPENDENT BANK CORPORATION (PARENT COMPANY ONLY) FINANCIAL INFORMATION [Abstract] Consolidated [Member] Consolidated Entities [Member] PRINCIPLES OF CONSOLIDATION Consumer [Member] Retail [Member] Corporate [Member] Credit Rating, AM Best [Axis] Credit Rating, AM Best [Domain] Cumulative effect of change in accounting principle Current expense (benefit) Issue Date Debt Instrument, Issuance Date OTHER BORROWINGS Debt Disclosure [Text Block] OTHER BORROWINGS [Abstract] Interest Rate Term of note Interest Rate Spread Debt Instrument, Basis Spread on Variable Rate Trust Preferred Securities Issued Debt Instrument, Face Amount Maturity Date Property and equipment Deferred Tax Assets, Property, Plant and Equipment Unrealized loss on securities available for sale Deferred expense Gross deferred tax liabilities Deferred Tax Liabilities, Gross Deferred tax assets [Abstract] Gross deferred tax assets net of valuation allowance Deferred Tax Assets, Net of Valuation Allowance Loss carryforwards Gross deferred tax assets Deferred Tax Assets, Gross Deferred tax assets, net Deferred tax assets, net Deferred tax assets Allowance for loan losses Share based payments Litigation settlement Deferred compensation Alternative minimum tax credit carry forward Other Deferred Tax Assets, Other Deferred tax liabilities [Abstract] Unrealized loss on trading securities Other Deferred Tax Liabilities, Other Valuation allowance Deferred Tax Assets, Valuation Allowance Maximum matching contribution, percent Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay Maximum contribution of employees' eligible wages Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent 401(k) and employee stock ownership plans amount expensed Defined Contribution Plan, Cost Recognized DEPOSITS Deposit Liabilities Disclosures [Text Block] DEPOSITS [Abstract] Deposits Total Deposits Deposits Savings and interest-bearing checking Net depreciation, amortization of intangible assets and premiums and accretion of discounts on securities, loans and interest bearning deposits - time Depreciation, Amortization and Accretion, Net Depreciation expense Derivative Instrument [Axis] Derivative Instrument [Axis] DERIVATIVE FINANCIAL INSTRUMENTS Derivative Instruments and Hedging Activities Disclosure [Text Block] Average Maturity Derivative financial instrument according to type of hedge[ Abstract] Derivatives Derivative financial instruments DERIVATIVE FINANCIAL INSTRUMENTS [Abstract] Notional Amount Derivatives Derivative financial instruments Derivative Liability Gain (Loss) Recognized in Income Fair Value Asset Derivatives Derivative Asset, Fair Value, Gross Asset Liability Derivatives Fair value of derivative instruments, balance sheet location [Abstract] Loss Recognized in Other Comprehensive Income (Loss) (Effective Portion) Loss Reclassified from Accumulated Other Comprehensive Loss into Income (Effective Portion) Derivative Instruments, Gain (Loss) [Line Items] Derivative Contract [Domain] Hedging Relationship [Axis] Derivative Instruments, Gain (Loss) [Table] Derivatives, Fair Value [Line Items] DERIVATIVE FINANCIAL INSTRUMENTS Director [Member] SHARE BASED COMPENSATION AND BENEFIT PLANS Disclosure of Compensation Related Costs, Share-based Payments [Text Block] SHARE BASED COMPENSATION AND BENEFIT PLANS [Abstract] Cash dividends declared NET INCOME PER COMMON SHARE Earnings Per Share, Policy [Policy Text Block] Basic (in dollars per share) Earnings Per Share, Basic Diluted (in dollars per share) Earnings Per Share, Diluted Earnings Per Share Reconciliation [Abstract] Net income per common share Statutory federal income tax rate Tax benefit realized Total compensation cost not yet recognized, period for recognition Stock Options [Member] Tax benefit relating to compensation expense recognized Employee Service Share-based Compensation, Tax Benefit from Compensation Expense Cash proceeds received Total compensation cost not yet recognized Equipment [Member] Furniture, fixtures and equipment Equipment Expense Equity Component [Domain] Custodial Escrow Balances Fair Value Measurements [Member] Fair Value [Member] Executive Officers [Member] Asset (Liability) Fair Value [Abstract] Asset Class [Axis] Liability Class [Axis] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Discount rate Measurement Frequency [Axis] FAIR VALUE DISCLOSURES [Abstract] Total Change in Fair Values Included in Current Period Earnings Fair Value, Option, Changes in Fair Value, Gain (Loss) Measurement Basis [Axis] Asset Class [Domain] Assets and liabilities measured at fair value Fair Value, Measurements, Nonrecurring [Member] Assets and liabilities measured at fair value [Abstract] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value, Measurement Frequency [Domain] Fair Value, Measurements, Recurring [Member] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value Hierarchy [Domain] Changes in fair value for financial assets [Abstract] FAIR VALUE DISCLOSURES Fair Value Disclosures [Text Block] Fair Value by Liability Class [Domain] Quantitative information about Level 3 fair value measurements measured on a non-recurring basis Fair Value, Assets and Liabilities Measured on Nonrecurring Basis, Valuation Techniques [Table Text Block] Fair Value, by Balance Sheet Grouping [Table] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Estimated fair values and recorded book balances Fair Value, by Balance Sheet Grouping [Table Text Block] Concentration of risk loans receivable Fair Value Measurement [Domain] Significant Unobservable Inputs (Level 3) [Member] Significant Unobservable Inputs, (Level 3) [Member] Fair Value, Inputs, Level 3 [Member] 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] Difference Fair Value, Option, Aggregate Differences, Loans and Long-term Receivables Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] Changes in fair value for financial assets Fair Value, Option, Quantitative Disclosures [Line Items] Fair Value, Option, Quantitative Disclosures [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] 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 FHLB advances terminated Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Repayment and Penalties FDIC deposit insurance 2016, Amount Advances from Federal Home Loan Bank ("FHLB") [Member] Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items] Federal Home Loan Bank, Advances, Fiscal Year Maturity [Abstract] Federal home loan bank stock Unused borrowing capacity with FHLB Federal Home Loan Bank, Advances, General Debt Obligations, Amount of Available, Unused Funds 2018, Amount Federal Home Loan Bank, Advances, Maturities Summary, Due in Year Three Federal Reserve Bank Advances [Member] Federal Reserve Bank Advances [Member] 2019, Amount 2017, Rate 2020, Rate 2017, Amount Federal Home Loan Bank, Advances, Maturities Summary, Average Interest Rate of Amounts Due [Abstract] 2020, Amount 2018, Rate Federal Home Loan Bank, Advances, Maturities Summary, Average Interest Rate, Two to Three Years from Balance Sheet Date 2016, Rate Federal Home Loan Bank, Advances, Maturities Summary, Average Interest Rate of Amounts Due within One Year of Balance Sheet Date Title insurance fees Fees and Commissions, Other Service charges on deposit accounts LOANS HELD FOR SALE Finance, Loan and Lease Receivables, Held-for-sale, Policy [Policy Text Block] 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 Financial Instruments Disclosure [Text Block] Financial Instrument [Axis] FAIR VALUES OF FINANCIAL INSTRUMENTS [Abstract] Financing Receivable, Recorded Investment, Past Due [Line Items] 90+ and Still Accruing Loans not Past Due Financing Receivable, Recorded Investment, Current Total Class of Financing Receivable, Type [Axis] Class of Financing Receivable, Type [Axis] Financing Receivable, Modifications [Line Items] Financing Receivables, Period Past Due [Axis] Loans Past Due, 90+ days [Member] Recoveries credited to allowance Loans Past Due, 60-89 days [Member] Individually evaluated for impairment Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment Financing Receivable, Allowance for Credit Losses [Line Items] Loans charged against the allowance Financing Receivable, Allowance for Credit Losses, Write-downs Financing Receivable, Recorded Investment [Line Items] Analysis of allowance for loan losses by portfolio segment [Roll Forward] Non-Accrual Recorded Balance Financing Receivable, Modifications, Subsequent Default, Recorded Investment Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Axis] Number of contracts Financing Receivable, Modifications, Subsequent Default, Number of Contracts Collectively evaluated for impairment Pre-modification recorded balance Financing Receivable, Modifications, Pre-Modification Recorded Investment Summary of loan ratings by loan class Financing Receivable Credit Quality Indicators [Table Text Block] Financing Receivables, Period Past Due [Domain] Allowance for loan losses and recorded investment in loans by portfolio segment [Abstract] Reclassification to loans held for sale Financing Receivable, Reclassification to Held-for-sale Financing Receivable, Impaired [Line Items] Post-modification recorded balance Financing Receivable, Modifications, Post-Modification Recorded Investment Balance at beginning of period Balance at end of period Financing Receivable, Allowance for Credit Losses Number of contracts Financing Receivable, Modifications, Number of Contracts Loans Not Past Due [Member] Class of Financing Receivable, Type [Domain] Collectively evaluated for impairment Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment Individually evaluated for impairment Financing Receivable Portfolio Segment [Domain] Financing Receivable Portfolio Segment [Domain] Loans Past Due, 30-59 days [Member] Charge offs due to troubled debt restructurings 2022 and thereafter 2018 Total Finite-Lived Intangible Assets, Net Accumulated Amortization 2017 Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months Other Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Gross Carrying Amount Estimated useful lives 2021 Summary of estimated core deposit intangible amortization [Abstract] Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract] 2020 2019 Fixed Income Interest Rate [Member] Other real estate and repossessed assets Other real estate and repossessed assets Foreign Government [Member] Gain on securities [Member] Gain (Loss) on Investments [Member] Net gains on securities Gain on securities Net gains on securities Gain on extinguishment of debt Gain on extinguishment of debt Gains on extinguishment of debt Net (gains) losses on other real estate and repossessed assets Gains (Losses) on Sales of Other Real Estate Net gains (losses) on assets INTANGIBLE ASSETS [Abstract] Hedging Relationship [Domain] Hedging Designation [Axis] Hedging Designation [Domain] Impaired loans Unpaid Principal Balance, with an allowance recorded Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance Recorded Investment, with an allowance recorded Impaired Financing Receivable, with Related Allowance, Recorded Investment Recorded Investment, with no related allowance recorded Impaired Financing Receivable, with No Related Allowance, Recorded Investment Interest Income Recognized Impaired Financing Receivable, Interest Income, Accrual Method Unpaid Principal Balance Average Recorded Investment Average Recorded Investment, with No Related Allowance Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment Average Recorded Investment, with Related Allowance Impaired Financing Receivable, with Related Allowance, Average Recorded Investment Impaired Loans by class [Abstract] Impaired Financing Receivable, Recorded Investment [Abstract] Related Allowance Impaired Financing Receivable, Related Allowance Interest Income Recognized, with No Related Allowance Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method Recorded Investment Impaired Financing Receivable, Recorded Investment Unpaid Principal Balance, with no related allowance recorded Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance Interest Income Recognized, with Related Allowance Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method INCOME TAX [Abstract] Income Statement Location [Axis] Equity in undistributed net income of subsidiaries Income (Loss) from Equity Method Investments Income Before Income Tax Income (Loss) Before Income Tax and Equity in Undistributed Net Income of Subsidiaries Total reclassifications before tax Income Statement Location [Domain] Income Approach [Member] Equity in undistributed net income of subsidiaries Income (Loss) from Equity Method Investments, Net of Dividends or Distributions INCOME TAX Income Tax Disclosure [Text Block] Income tax expense Income tax benefit Income tax expense Income tax expense (benefit) CONSOLIDATED STATEMENTS OF OPERATIONS [Abstract] CONDENSED STATEMENTS OF OPERATIONS [Abstract] Statutory rate applied to income before income tax Income tax expense (benefit) [Abstract] Reconciliation of income tax benefit [Abstract] Effective Income Tax Rate Reconciliation, Amount [Abstract] Net change in valuation allowance Non-deductible meals, entertainment and memberships Other, net INCOME TAXES Income Tax, Policy [Policy Text Block] Income taxes Tax-exempt income Effective Income Tax Rate Reconciliation, Tax Exempt Income, Amount Deferred income tax expense Deferred income tax benefit Increase (Decrease) in Deferred Income Taxes Increase (decrease) in accrued expenses and other liabilities Increase (decrease) in accrued expenses and other liabilities Net increase in total deposits Fair value option - Loans held for sale [Abstract] Increase (Decrease) in Loans Held-for-sale [Abstract] Deferred loan fees Increase (Decrease) in Loans, Deferred Income Increase in accrued income and other assets Decrease 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) INTANGIBLE ASSETS Intangible Assets Disclosure [Text Block] Amortized intangible assets - core deposits [Abstract] OTHER INTANGIBLE ASSETS Intangible Assets, Finite-Lived, Policy [Policy Text Block] Other intangibles Intangible assets INTEREST EXPENSE Interest Expense [Abstract] Interest and fees on loans INTEREST INCOME Total Interest Income Interest income Interest and Dividend Income, Operating Total Interest Expense Interest expense Interest expense Interest on securities Accrued interest payable Interest expense on FHLB advances Summary of interest expense on deposits [Abstract] Interest Expense, Deposits [Abstract] Other borrowings Interest Expense, Borrowings Total Deposits Interest Expense, Deposits Time deposits of $100,000 or more Interest Expense, Time Deposits, $100,000 or More Savings and interest bearing checking Interest Expense, NOW Accounts, Money Market Accounts, and Savings Deposits Net Interest Income Interest Income (Expense), Net Interest Income [Member] Time deposits under $100,000 Interest Expense, Time Deposits, Less than $100,000 Net Interest Income After Provision for Loan Losses Interest Income (Expense), after Provision for Loan Loss Taxable Interest-Rate Cap Agreement [Member] Interest Tax-exempt Accrued interest receivable Time Interest Expense [Member] Interest Rate Swap [Member] Interest Rate Swap [Member] Interest bearing deposits Interest-bearing Deposits in Banks and Other Financial Institutions Rate-Lock Mortgage Loan Commitments [Member] Internal Credit Assessment [Domain] Internal Credit Assessment [Axis] SECURITIES Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] SECURITIES [Abstract] Amortized cost and fair value of securities available for sale by contractual maturity Investment in subsidiaries Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures Subordinated debentures Subordinated debentures Subordinated Debentures Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Compensation and employee benefits Land [Member] LEASES [Abstract] LEASES Leases of Lessee Disclosure [Text Block] Total Liabilities Liabilities Total Liabilities and Shareholders' Equity Total Liabilities and Shareholders' Equity LIABILITIES AND SHAREHOLDERS' EQUITY LIABILITIES AND SHAREHOLDERS' EQUITY [Abstract] Liabilities and Equity [Abstract] Liabilities [Abstract] Liabilities, Fair Value Disclosure [Abstract] Litigation Status [Axis] Litigation Status [Domain] Repayments Loans and Leases Receivable, Related Parties, Proceeds Total ending allowance balance Allowance for loan losses Loans and Leases Receivable, Allowance Installment ALLOWANCE FOR LOAN LOSSES Loans and Leases Receivable, Allowance for Loan Losses Policy [Policy Text Block] Net of deferred loan fees Loans [Abstract] Loans and Leases Receivable, Other Information [Abstract] New loans and advances Loans [Abstract] Loans Net Loans Loans and Leases Receivable, Net Amount Summary of loans and leases receivable [Roll Forward] Loans and Leases Receivable, Related Parties [Roll Forward] Total Loans Total Loans Total Loans Loans and Leases Receivable, Net of Deferred Income Balance at end of year Balance at beginning of year Loans and Leases Receivable, Related Parties Loans held for sale, carried at fair value Loans held for sale Loans held for sale Loans Held For Sale [Member] Contractual Principal Loans Receivable Held-for-sale, Amount LOANS AND PAYMENT PLAN RECEIVABLES Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Commercial Commercial loans Loans Receivable, Gross, Commercial, Financial and Agricultural Commercial and industrial Total Long-term Debt Summary of repayments of FHLB Advances [Abstract] 2019 Long-term Debt, Maturities, Repayments of Principal in Year Three 2018 Long-term Debt, Maturities, Repayments of Principal in Year Two 2020 Long-term Debt, Maturities, Repayments of Principal in Year Four 2017 Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months Loss Contingencies [Table] Loss Contingencies [Line Items] Loss Contingency Nature [Axis] Loss Contingency, Nature [Domain] Estimate of reasonably possible loss Major Types of Debt and Equity Securities [Axis] Major Types of Debt and Equity Securities [Domain] Trust preferred securities Marketable Securities [Table Text Block] SECURITIES Marketable Securities, Policy [Policy Text Block] Net gains on securities Securities Marketable Securities, Gain (Loss), Excluding Other than Temporary Impairments Summary of the maturity of time deposits [Abstract] Maturities of Time Deposits [Abstract] Maximum [Member] Minimum [Member] Mortgage loans in process of foreclosure Mortgage Loans on Real Estate, Loan Type [Domain] Weighted average interest rate Mortgage Loans on Real Estate, Loan Type [Axis] Private Label Mortgage-Backed [Member] U.S. Agency Residential Mortgage-Backed [Member] Vehicle service contract counterparty reserve [Roll Forward] Movement in Valuation Allowances and Reserves [Roll Forward] Non-performing TDR's [Member] CASH FLOW FROM FINANCING ACTIVITIES CASH FLOW USED IN FINANCING ACTIVITIES [Abstract] Net Cash Used in Investing Activities Net Cash Provided by (Used in) Investing Activities, Continuing Operations Net Cash From Financing Activities Net Cash Provided by (Used in) Financing Activities, Continuing Operations Net Cash From Operating Activities Net Cash Provided by (Used in) Operating Activities, Continuing Operations CASH FLOW USED IN INVESTING ACTIVITIES CASH FLOW FROM INVESTING ACTIVITIES [Abstract] Net income Net Income Total reclassifications for the period, net of tax Net Income (Loss) Attributable to Parent Net income per common share [Abstract] Net Income (Loss) Available to Common Stockholders, Diluted [Abstract] Net income New Accounting Pronouncements or Change in Accounting Principle [Table] ADOPTION OF NEW ACCOUNTING STANDARDS New Accounting Pronouncements, Policy [Policy Text Block] Mortgage loans servicing rights, change in retained deficit, net of tax New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets New Accounting Standrads [Abstract] New Accounting Pronouncements or Change in Accounting Principle [Line Items] Non-interest bearing NON-INTEREST INCOME NON-INTEREST EXPENSE OTHER NON-INTEREST INCOME [Abstract] Total Non-interest Expense Noninterest Expense Total Non-Interest Income Noninterest Income Other Total other non-interest income Noninterest Income, Other Operating Income Promissory Note [Member] Number of reportable segments No Hedge Designation [Member] No Hedge Designation [Member] Other comprehensive income (loss) before reclassifications OCI, before Reclassifications, Net of Tax, Attributable to Parent Occupancy, net COMMITMENTS TO EXTEND CREDIT AND RELATED FINANCIAL INSTRUMENTS Off-Balance-Sheet Credit Exposure, Policy [Policy Text Block] Open tax year OPERATING INCOME [Abstract] Total Operating Leases, Future Minimum Payments Due OPERATING EXPENSES [Abstract] 2018 Operating Leases, Future Minimum Payments, Due in Two Years Total Operating Expenses Operating Expenses Summary of future minimum lease payments under non-cancelable operating leases [Abstract] Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] 2017 Operating Leases, Future Minimum Payments Due, Next Twelve Months 2022 and thereafter Operating Leases, Future Minimum Payments, Due Thereafter Rental expense on operating leases Operating Leases, Rent Expense, Net Total Operating Loss Carryforwards 2019 Operating Leases, Future Minimum Payments, Due in Three Years Total Operating Income Operating Income (Loss) 2020 Operating Leases, Future Minimum Payments, Due in Four Years 2021 Operating Leases, Future Minimum Payments, Due in Five Years Income tax expense (benefit) Other Comprehensive Income (Loss), Available-for-sale Securities, Tax Other real-estate [Abstract] Income tax expense Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax Reclassification adjustments for gains included in earnings Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax Other Real Estate [Roll Forward] Unrealized gains recognized in other comprehensive income (loss) on derivative instruments Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, before Tax Unrealized gains (losses) recognized in other comprehensive income (loss) on securities available for sale, net of tax Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax Increases to credit losses on securities for which OTTI was previously recognized Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward] Other than temporary impairment loss on securities Securities impairment recognized in earnings Net impairment loss recognized in earnings OTTI changes recorded in earnings Total impairment loss Net impairment loss recognized in earnings Other than Temporary Impairment Losses, Investments, Available-for-sale Securities Balance at beginning of period Balance at end of period Other than Temporary Impairment, Credit Losses Recognized in Earnings, Credit Losses on Debt Securities Held Loss recognized in other comprehensive income (loss) Other than Temporary Impairment Losses, Investments, Portion in Other Comprehensive Loss, before Tax, Including Portion Attributable to Noncontrolling Interest Additions to credit losses on securities for which no previous OTTI was recognized Unrealized gains (losses) recognized in other comprehensive income (loss) on securities available for sale Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, before Tax Securities available for sale Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, before Tax, [Abstract] Other borrowings Total Other borrowings Other Borrowings Accrued income and other assets Accrued income and other assets Unrealized gains recognized in other comprehensive income (loss) on derivative instruments, net of tax Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax Derivative instruments Unrealized gain (loss) arising during period Other investments Administrative and other expenses Accrued expenses and other liabilities Accrued expenses and other liabilities Other Other Noninterest Expense Other income Other Operating Income Other Assets [Member] Other comprehensive income (loss) Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent [Abstract] Other Liabilities [Member] Other comprehensive income (loss) Other comprehensive income (loss) Net current period other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Performing TDR's [Member] Aging analysis of loans by class Past Due Financing Receivables [Table Text Block] Parent Company [Member] Parent Company [Member] Disbursements for loans held for sale Payments for Origination of Mortgage Loans Held-for-sale Share based compensation withholding obligation Share based compensation withholding obligation Payments Related to Tax Withholding for Share-based Compensation Net increase in portfolio loans (loans originated, net of principal payments) Payments for (Proceeds from) Loans and Leases Redemptions of trust preferred securities at par value Purchases of securities available for sale Payments to Acquire Available-for-sale Securities Dividends paid Payments of Dividends Repurchase of common stock Payments for Repurchase of Common Stock Purchase of Federal Reserve Bank stock Payments to Acquire Federal Reserve Bank Stock Capital expenditures Payments to Acquire Property, Plant, and Equipment Pending Litigation [Member] Performance stock units [Member] Plan Name [Domain] Plan Name [Axis] Portion at Fair Value Measurement [Member] Portion at Fair Value Measurement [Member] Preferred stock, shares issued (in shares) Preferred Stock, Shares Issued Preferred stock, par value (in dollars per share) Preferred Stock, No Par Value Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Preferred stock, shares outstanding (in shares) Preferred Stock, Shares Outstanding Preferred stock, no par value, 200,000 shares authorized; none issued or outstanding Preferred Stock, Value, Issued President [Member] RECLASSIFICATION Net decrease in other borrowings Cash payment for litigation settlement relating to collection of vehicle service contracts counterparty receivables Proceeds from issuance of common stock Proceeds from issuance of common stock Proceeds from Federal Home Loan Bank advances Proceeds from Federal Home Loan Bank Borrowings Proceeds from bank-owned life insurance Proceeds from sales of loans held for sale Proceeds from Sale of Loans Held-for-sale Proceeds from the sale of securities available for sale Proceeds from the sale of other real estate and repossessed assets Proceeds from the sale of property and equipment Legal and professional Estimated useful lives Property, Plant and Equipment, Useful Life Property, Plant and Equipment, Type [Domain] PROPERTY AND EQUIPMENT PROPERTY AND EQUIPMENT [Abstract] Property and Equipment [Abstract] Summary of property and equipment Property, Plant and Equipment [Table Text Block] Property and equipment, net Property and equipment, Net Property, Plant and Equipment [Line Items] Property and equipment, Gross Property, Plant and Equipment, Type [Axis] PROPERTY AND EQUIPMENT Property, Plant and Equipment Disclosure [Text Block] Provision for loan losses Provision for loan losses Additional provision for loan losses on impaired loans Range [Axis] Range [Domain] OTHER REAL ESTATE [Abstract] Additions charged to expense Real Estate Owned, Valuation Allowance, Provision Real Estate Owned Valuation Allowance [Roll Forward] Direct write-downs upon sale Real Estate Owned, Valuation Allowance, Amounts Applied OTHER REAL ESTATE Real Estate Owned [Text Block] Balance at end of year Balance at beginning of year Other real estate, valuation allowance Real Estate Owned, Valuation Allowance Credit losses recognized in earnings on securities available for sale LOANS AND PAYMENT PLAN RECEIVABLES [Abstract] Amounts reclassified from AOCL Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] Reclassification Out Of Accumulated Other Comprehensive Income [Table] Reclassification out of Accumulated Other Comprehensive Income [Table] Reclassification out of Accumulated Other Comprehensive Income [Member] Reclassification out of Accumulated Other Comprehensive Income [Domain] Reclassification out of Accumulated Other Comprehensive Income [Axis] Summary of reclassifications out of each component of AOCL Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] Changes in unrecognized tax benefits [Roll Forward] REGULATORY MATTERS Regulatory Capital Requirements under Banking Regulations [Text Block] RELATED PARTY TRANSACTIONS Related Party Transactions Disclosure [Text Block] Directors and executive officers deposit Related Party Transaction [Line Items] RELATED PARTY TRANSACTIONS [Abstract] Payments of Federal Home Loan Bank Advances Repayments of Federal Home Loan Bank Borrowings Redemption of subordinated debt Repayments of Subordinated Debt Counterparty Name [Domain] Residential Real Estate [Member] Residential First Mortgages [Member] Residential Mortgage [Member] Mortgage [Member] Mortgage [Member] Cumulative Retrospective Adjustments [Member] Restatement Adjustment [Member] RESTRICTIONS ON CASH AND DUE FROM BANKS Restricted Assets Disclosure [Text Block] Restricted Stock [Member] RESTRICTIONS ON CASH AND DUE FROM BANKS [Abstract] Accumulated Deficit [Member] Accumulated deficit LOAN REVENUE RECOGNITION CONCENTRATIONS OF CREDIT RISK [Abstract] Exercisable, Aggregate Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Vested and Expected to Vest, Weighted-Average Remaining Contractual Term Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term Outstanding, Weighted-Average Remaining Contractual Term Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Exercisable, Weighted-Average Remaining Contractual Term Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Estimated amortization of other intangible assets Scenario, Unspecified [Domain] Originally Presented [Member] Scenario, Previously Reported [Member] Schedule of Financing Receivable, Allowance for Credit Losses [Table] Composition of income tax expense (benefit) Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Schedule of accumulated other comprehensive loss (AOCL), net of tax Summary of deferred tax assets and deferred tax liabilities Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Summary of non-vested restricted stock and stock units and transactions Schedule of Finite-Lived Intangible Assets [Table] Schedule of Financing Receivable, Recorded Investment, Credit Quality Indicator [Table] Summary of outstanding stock option grants and transactions Information regarding options exercised Loans on non-accrual status and past due more than 90 days Other intangible assets, net of amortization Schedule of Financing Receivable, Troubled Debt Restructurings [Table] Summary of loans to directors and executive officers Schedule of Related Party Transactions [Table Text Block] Schedule of Financing Receivables Past Due [Table] CONDENSED STATEMENTS OF FINANCIAL CONDITION Condensed Balance Sheet [Table Text Block] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of changes in unrecognized tax benefits CONDENSED STATEMENTS OF CASH FLOWS Condensed Cash Flow Statement [Table Text Block] Reconciliation of basic and diluted loss per share Analysis of allowance for loan losses by portfolio segment Securities available for sale Schedule of Available-for-sale Securities Reconciliation [Table Text Block] Schedule of Impaired Financing Receivable [Table] Gains and losses realized on sale of securities available for sale Schedule of Realized Gain (Loss) [Table Text Block] Summary of future minimum lease payments under non-cancelable operating leases Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Investments in a continuous unrealized loss position CONDENSED STATEMENTS OF OPERATIONS Condensed Income Statement [Table Text Block] Reconciliation of income tax benefit computed by applying the statutory federal income tax rate Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table] Schedule of Available-for-sale Securities [Table] Schedule of Condensed Financial Statements [Table] Schedule of Available-for-sale Securities [Line Items] Actual capital amounts and ratios Schedule of Fair Value, Off-balance Sheet Risks [Table] Schedule of Federal Home Loan Bank Advances, by Branch of FHLB Bank [Table] Financial instruments with off-balance sheet risk Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Condensed consolidated statement of financial position to reflect cumulative effect of adjustments Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block] Schedule of Short-term Debt [Table] Schedule of Related Party Transactions, by Related Party [Table] Schedule of information regarding subordinated debentures Schedule of Subordinated Borrowing [Table Text Block] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Axis] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Fair value of derivative instruments Schedule of Stock by Class [Table] Loan portfolios Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Effect of derivative financial instruments on consolidated statement of operation Operating Segments [Abstract] Segment Reporting [Abstract] OPERATING SEGMENTS Geographical [Domain] Originated servicing rights capitalized Capitalized mortgage loan servicing rights Balance at end of year Balance at beginning of year Fair value of capitalized mortgage loan servicing rights Average discount rate Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Discount Rate Change in valuation allowance Mortgage loan servicing, net Information regarding options exercised [Abstract] Share based compensation Share-based Compensation Forfeited (in dollars per share) Vesting period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Weighted-Average Grant Date Fair Value [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Exercised (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Granted (in dollars per share) 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] Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Expired (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Number of additional shares approved for grant (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized Forfeited (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Average Exercise Price [Roll Forward] Granted (in shares) Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Expired (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period Outstanding, ending balance (in dollars per share) Outstanding, beginning 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 Outstanding, beginning balance (in shares) Outstanding, ending balance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number 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) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Weighted-Average Remaining Contractual Term (Years) [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract] Intrinsic value Vested (in dollars per share) Vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period 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 Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value 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 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] Outstanding, Aggregate Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Number of Shares [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] SHARE BASED COMPENSATION Share based compensation withholding obligation, common stock (in shares) Financial Instruments Subject to Mandatory Redemption, Financial Instrument [Domain] Short-term Debt, Type [Domain] Short-term Debt, Type [Axis] Short-term Debt [Line Items] Short-term Debt [Line Items] ACCOUNTING POLICIES Significant Accounting Policies [Text Block] Single-family Residential Loans [Member] Standby Letters of Credit [Member] State income tax expense (benefit) State and Local Income Tax Expense (Benefit), Continuing Operations Class of Stock [Axis] Statement [Line Items] Equity Components [Axis] Equity Components [Axis] CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY [Abstract] CONDENSED STATEMENTS OF CASH FLOWS [Abstract] CONSOLIDATED STATEMENTS OF CASH FLOWS [Abstract] CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME [Abstract] Statement [Table] CONDENSED STATEMENTS OF FINANCIAL CONDITION [Abstract] CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION [Abstract] Scenario [Axis] Geographical [Axis] Share based compensation, common stock (in shares) Stock repurchase program, additional authorized amount Stock Repurchase Program, Authorized Amount Stock repurchased (in shares) Repurchase of shares of common stock (in shares) Issuance of common stock Stock Issued During Period, Value, New Issues Repurchase of common stock Stock repurchased Issuance of shares of common stock (in shares) Exercised (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Share based compensation Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures COMMON STOCK Stockholders' Equity, Policy [Policy Text Block] Shareholders' Equity SHAREHOLDERS' EQUITY AND INCOME PER COMMON SHARE Stockholders' Equity Note Disclosure [Text Block] SHAREHOLDERS' EQUITY AND INCOME PER COMMON SHARE [Abstract] Balance at beginning of period Balances at end of the period Total Shareholders' Equity Shareholders' equity Total shareholders' equity Subordinated Borrowing [Table] Subordinated Debentures Subject to Mandatory Redemption [Member] SUBORDINATED DEBENTURES Subordinated Borrowings Disclosure [Text Block] Subordinated Borrowing [Line Items] SUBORDINATED DEBENTURES [Abstract] Mepco [Member] Subsidiaries [Member] Schedule of federal net operating loss forwards Actual, Ratio Minimum for Adequately Capitalized Institutions, Amount Tier One Leverage Capital Required for Capital Adequacy Minimum for Adequately Capitalized Institutions, Ratio Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets Minimum for Well-Capitalized Institutions, Amount Tier One Risk Based Capital Required to be Well Capitalized Tier 1 capital to average assets [Abstract] Minimum for Well-Capitalized Institutions, Ratio Tier One Leverage Capital Required to be Well Capitalized to Average Assets Actual, Ratio Tier One Leverage Capital to Average Assets Minimum for Adequately Capitalized Institutions, Amount Tier One Risk Based Capital Required for Capital Adequacy Minimum for Well Capitalized Institutions, Ratio Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets Tier 1 capital Tier One Leverage Capital Minimum for Adequately Capitalized Institutions, Ratio Tier One Leverage Capital Required for Capital Adequacy to Average Assets Minimum for Well-Capitalized Institutions, Amount Actual, Amount Tier One Risk Based Capital Tier 1 capital to risk-weighted assets [Abstract] Tier One Risk Based Capital [Abstract] 2021 Time Deposit Maturities, Year Five Total Deposits with stated maturity 2020 Time Deposit Maturities, Year Four 2018 Time Deposit Maturities, Year Two 2017 Time Deposit Maturities, Next Twelve Months 2019 Time Deposit Maturities, Year Three 2022 and thereafter Time Deposit Maturities, after Year Five Relationship to Entity [Domain] Title of Individual [Axis] Trading Activity [Axis] Trading securities Trading securities Trading Securities [Member] Trading Activity, by Type [Domain] Trading Securities, Realized Gain (Loss) Trading Securities, Realized Gain (Loss) Transfers to other real estate and repossessed assets Financial Instruments [Domain] TRANSFERS OF FINANCIAL ASSETS Troubled debt restructurings Trust Preferred [Member] Trust Preferred Securities Subject to Mandatory Redemption [Member] Type of Adoption [Domain] Subjective Allocation [Member] Unallocated Financing Receivables [Member] Additions based on tax positions related to the current year Reductions due to the statute of limitations Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations Penalties and interest expense Unrecognized tax benefits of effective tax rate Penalties and interest accrued Reductions due to settlements Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities Balance at beginning of year Balance at end of year Unrecognized Tax Benefits U.S. Agency [Member] Obligations of States and Political Subdivisions [Member] Valuation Allowances and Reserves Type [Axis] Valuation and Qualifying Accounts Disclosure [Table] Balance at end of year Balance at beginning of year Valuation Allowances and Reserves, Balance Reserve established on previously charged-off receivable Valuation Allowances and Reserves, Additions for Adjustments Capitalized mortgage loan servicing rights, valuation allowance Valuation allowance Reversal of valuation allowance on net deferred tax assets Valuation Allowances and Reserves [Domain] Valuation Technique [Axis] Valuation Technique [Domain] Additions (recoveries) recorded to expense Valuation Allowances and Reserves, Additions for Charges to Cost and Expense Valuation and Qualifying Accounts Disclosure [Line Items] Charge-offs, net Valuation Allowances and Reserves, Period Increase (Decrease) Variable Income Interest Rate [Member] Amended Warrant [Member] Warrant [Member] Weighted average shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic Restricted stock units (in shares) Weighted average shares outstanding for calculation of diluted earnings per share (in shares) Weighted Average Number Diluted Shares Outstanding Adjustment Tabular disclosure of components of regulatory capital. Components of regulatory capital [Text Block] Components of regulatory capital Dividends paid to the parent company by its wholly owned subsidiary. Dividends From Subsidiary Dividends from subsidiary Cash inflow received as return of capital from subsidiary Proceeds from return of capital from subsidiary Return of capital from subsidiary The net cash outflow for the purchase of Interest-bearing Deposits-Time by banks in other financial institutions with maturities greater than three months including, for example, certificates of deposits. Payments For In Interest Bearing Deposits In Banks Time Purchases of interest bearing deposits - time The net cash inflow for the maturity of Interest-bearing Deposits-Time by banks in other financial institutions with maturities greater than three months including, for example, certificates of deposits. Proceeds From Interest Bearing Deposits In Banks Time Proceeds from the maturity of interest bearing deposits - time Maturity of interest bearing deposits - time Sum of operating profit and nonoperating income or expense before equity in undistributed net loss of subsidiaries. Income Loss from Continuing Operations Before Equity in Undistributed Net Loss of Subsidiaries Income (Loss) Before Equity in Undistributed Net Income of Subsidiaries For banks and other depository institutions: Interest-bearing deposits-time in other financial institutions with maturities of more than three months including, for example, certificates of deposits, which are presented separately from cash on the balance sheet. Interest bearing deposits time Interest bearing deposits - time 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 Schedule of the inputs used in the fair value measurement of assets and liabilities. This disclosure may include, but is not limited to, the fair value of the asset and liability, valuation technique used to measure fair value, the inputs used to measure fair value, the ranges of the inputs, and the weighted averages of the inputs. Fair Value Inputs Assets and Liabilities Quantitative Information [Table] Represents the sales comparison approach to measure fair value. Sales comparison approach [Member] Sales Comparison Approach [Member] Represents the present value of net servicing revenue used to measure fair value. Present Value of Net Servicing Revenue [Member] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Fair Value Inputs Assets and Liabilities Quantitative Information [Line Items] Quantitative information about Level 3 fair value measurement measured on a non recurring basis [Abstract] Represents the impaired loans mortgage loans. Impaired Loans Mortgage [Member] Represents the other real estate mortgage and installment loans. Other Real Estate Mortgage and Installment [Member] Represents the impaired loans commercial. Impaired Loans Commercial [Member] Represents the other real estate commercial loans. Other Real Estate Commercial [Member] Impaired Loan [Abstract] Impaired loan [Abstract] Amount before allowance of commercial loans and leases receivable includes, but not limited to, commercial and industrial loans, agricultural loans, mortgage loans, promissory notes, interbank and other loans to financial institutions, draws against credit facilities, trade financing, lease financings, fair value disclosure. Commercial, Fair Value Disclosure Commercial Commercial impaired loans, fair value disclosure. Impaired Loans Commercial Commercial Amount before allowance of consumer mortgage and installment and revolving loans issued to individuals, including, but not limited to credit card, automobile, boat, student, durable home appliance loans, fair value disclosure. Mortgage and Installment, Fair Value Disclosure Mortgage and Installment Capitalized mortgage loan servicing rights, fair value disclosure. Capitalized Mortgage Loan Servicing Rights Fair Value Disclosure. Capitalized mortgage loan servicing rights Unobservable Inputs Weighted Average [Abstract] Adjustment for differences between comparable sales used as an input to measure fair value. Fair Value Inputs Adjustment for Differences Between Comparable Sales Adjustment for differences between comparable sales Cost to service used as an input to measure fair value. Fair Value Inputs, Cost of Service Cost to service Ancillary income used as an input to measure fair value. Fair Value Inputs Ancillary Income Ancillary income Capitalization rate used as an input to measure fair value. Fair Value Inputs Capitalization Rate Capitalization rate Float rate used as an input to measure fair value. Fair Value Inputs Float Rate Float rate Mortgage impaired loans, fair value disclosure. Impaired Loans Mortgage Mortgage The denominations amount of aggregate domestic and foreign time deposit liabilities (including certificates of deposits, individual retirement accounts and open accounts) in denominations of $250,000 or more. Time Deposits Denominations Amount Time Deposits denominations amount The denominations amount of aggregate domestic and foreign time deposit liabilities (including certificates of deposits, individual retirement accounts and open accounts) in denominations of $250,000 or more. Time Deposits, $250,000 or More Aggregate amount of time deposits of $250,000 or more Summary of reciprocal deposits [Abstract] Summary of reciprocal deposits [Abstract] Amount of reciprocal money market deposits. Reciprocal Money Market Deposits Money market Total amount of reciprocal deposits . Reciprocal deposits Reciprocal Total Amount of reciprocal demand deposits. Reciprocal Demand Deposits Demand Amount of reciprocal time deposits. Reciprocal Time Deposits Time The maximum dollar level at which collateral dependent commercial impaired loans will have their appraisal reports reviewed by the special assets group. Value of collateral dependent impaired loans that will be reviewed by special assets group, maximum Value of collateral-dependent impaired loans that will be reviewed by special assets group, maximum Class of assets, impaired loans. Impaired Loans [Member] Commercial Other Real Estate [Abstract] Commercial [Abstract] Installment [Abstract] Refers to the fair value of home equity installment - 1st lien. Home Equity Installment 1st Lien Fair Value Disclosure Home equity - 1st lien Income producing real estate stated at fair value. Income producing real estate, Fair Value Disclosure Income producing - real estate Mortgage [Abstract] Mortgage [Abstract] Refers to the fair value of home equity mortgage - 1st lien. Home Equity Mortgage 1st Lien Fair Value Disclosure Resort lending mortgage, fair value disclosure. Resort Lending, Fair Value Disclosure Resort lending 1-4 family mortgage, fair value disclosure. Family 1 to 4, fair value disclosure 1-4 family Impaired loans [Abstract] Impaired loans [Abstract] Commercial [Abstract] Mortgages [Abstract] Mortgage [Abstract] Land development and construction real estate, stated at fair value. Land, land development and construction real estate, Fair Value Disclosure Land, land development & construction - real estate The minimum dollar level at which collateral dependent commercial impaired loans will have their appraisal reports reviewed by an independent third party. Value of collateral dependent impaired loans that will be reviewed by independent third party minimum Value of collateral-dependent impaired loans that will be reviewed by independent third party, minimum Refers to the other real estate of loan portfolios. Other Real Estate [Member] Other [Member] The additional recovery (charges) of capitalized mortgage loan servicing rights, whose individual strata is measured at fair value. Capitalized Mortgage Loan Servicing Rights Additional Income Charges Capitalized mortgage loan servicing rights recoveries The carrying amount of capitalized mortgage loan servicing rights, whose individual strata is measured at fair value. Capitalized mortgage loan servicing rights, carrying amount Capitalized mortgage loan servicing rights, carrying amount Carrying amount of other real estate that are impaired, net reserves. Other Real Estate Impaired, Net Reserves Other real estate, carrying amount The valuation allowance on loans measured for impairment, using the fair value of collaterals. Collateral dependent loans, valuation allowance For each line item in the statement of financial position, the amounts of gains and losses from fair value changes, for those assets with elected fair value option. Fair Value Option Changes In Fair Value Gain Loss2 Net Gains (Losses) on Assets Loans which are measured for impairment using the fair value of collaterals. Collateral dependent loans, carrying amount The amount of impaired collateral dependent that is primarily secured by other than real estate. Impairment Collateral Dependent Other Than Real Estate Total impaired collateral value Director and officer ownership percentage exceeding a specific percentage amount. Percentage Of Voting Interest Owned By Related Party Related party entity ownership percentage Director and officer borrowing relationship exceeding a defined dollar amount. Borrowing Relationship Exceeds Level For Related Party Borrowing relationship exceeds level Represents effective percentage of vehicle service contract payment plans purchased from counterparties. Effective yields of payment plan receivables Effective yields of payment plan receivables Residential home equity and other junior mortgages. Residential home equity and other junior mortgages [Member] Residential Home Equity and Other Junior Mortgages [Member] The cash outflow for the purchase of mortgage loans receivable. Payments To Acquire Mortgage Loans Receivable Mortgage loans purchased Portfolio segment of the company's total financing receivables related to agriculture receivables. Agriculture Portfolio Segment [Member] Agricultural [Member] Portfolio segment of the company's total financing receivables related to payment plan receivable financing receivables. Payment Plan Receivable Portfolio Segment [Member] Payment Plan Receivables [Member] Represents total carrying amount of vehicle service contract payment plans purchased from counterparties. Payment Plan Receivables, Total Payment plan receivables The weighted average servicing fee on a group of mortgage loans receivable. Residential Mortgage Loans Weighted Average Servicing Fee Percentage Mortgage loans, servicing fee percentage Loans to fund construction and land development. Construction And Land Improvements [Member] Construction and Land Development [Member] Amount of unamortized discount on payment plan receivables. Unamortized Discount Unamortized discount Weighted average remaining contractual term of mortgage loans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Mortgage Loans Weighted Average Remaining Contractual Maturity Weighted average remaining contractual maturity Portfolio segment of the company's total financing receivables related to real estate receivables. Real Estate Portfolio Segment [Member] Real Estate [Member] Portfolio segment of the company's total financing receivables related to commercial receivables that do not include loans from the commercial real estate portfolio segment. Commercial Loan Portfolio Segment, Excluding Real Estate Portfolio Segment [Member] Commercial [Member] 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 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 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 Disclosure of troubled debt restructurings. Troubled debt restructuring TDR that subsequently defaulted [Abstract] 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 Refers to additional amounts committed to lend to customers with outstanding loans that are classified as troubled debt restructurings. Additional amounts committed to lend as troubled debt restructurings Loans classified as troubled debt restructurings [Abstract] Amount of increase (decrease) in the allowance for doubtful accounts due to TDR's that subsequently defaulted. Allowance For Doubtful Accounts Receivable Period Increase Decrease Due To T D R Increase (decrease) in allowance for loan loss due to TDRs that subsequently defaulted 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, specific reserve Financing arrangement that represents a contractual right to receive money either on demand or on fixed or determinable dates related to commercial land, land development and real estate construction. Commercial Land Land Development Real Estate Construction Financing Receivable [Member] Land, Land Development and Construction Real Estate [Member] Class of financing receivables related to resort lending financing receivables. Resort Lending [Member] Resort Lending [Member] Class of financing receivables related to 1-4 family financing receivables. Family 1 4 [Member] 1-4 Family [Member] Class of financing receivables related to purchased loans financing receivables. Purchased Loans [Member] Purchased Loans [Member] Class of financing receivables related to home equity - 2nd lien financing receivables. Home Equity, Second Lien [Member] Home Equity - 2nd Lien [Member] Class of financing receivables related to loans not secured by real estate financing receivables. Loans Not Secured By Real Estate [Member] Loans Not Secured By Real Estate [Member] Class of financing receivables related to income producing real estate financing receivables. Commercial Income Producing Real Estate Receivable [Member] Income Producing - Real Estate [Member] Portfolio segment of the company's total financing receivables related to installment financing receivables. Installment Portfolio Segment [Member] Installment [Member] 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 Class of financing receivables related to installment financing receivables. Installment Other [Member] Other [Member] Class of financing receivables related to home equity - 1st lien financing receivables. Home Equity, First Lien [Member] Home Equity - 1st Lien [Member] The period when loan payment is considered to be in default. Past due period for modified loans Past due period for modified loans Schedule itemizing specific types of notes receivable serviced for others. May include for each the gross carrying value, allowance, and net carrying value as of the balance sheet date. Schedule of Loans and Financing Receivables Serviced For Others [Table] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Schedule of Loans and Financing Receivables Serviced For Others [Line Items] Analysis of capitalized mortgage loan servicing rights [Abstract] The average servicing fee rate used to estimate the fair value of servicing assets and servicing liabilities. Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Average Servicing Fee Rate Average servicing fee The average PSA rate used to estimate the fair value of servicing assets and servicing liabilities. Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Discount Rate, Average PSA Rate Average PSA Rate The average coupon rate used to estimate the fair value of servicing assets and servicing liabilities. Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Average Coupon Rate Average coupon rate The carrying amount of mortgage loans on real estate that were being serviced for others at period end. Mortgage Loans On Real Estate Serviced Loans sold and serviced that have had servicing rights capitalized Mortgage Loans Serviced For Others [Abstract] Mortgage loans serviced for others [Abstract] Refers to maximum percentage of decline in net worth for two consecutive quarters. Maximum percentage of decline in net worth for two consecutive quarters Maximum percentage of decline in net worth for two consecutive quarters Refers to the required amount of highest level of capital need to maintain. Highest Level of Capital Amount Highest level of capital, Amount This is the principal amount outstanding for mortgage loans serviced for others. Principal Amount Outstanding On Loans Serviced For Others Mortgage loans serviced Refers to percentage of decline in net worth during the period for profitability requirement. Percentage of decline in net worth during the period Percentage of decline in net worth during the period Refers to maximum percentage of decline in net worth for one consecutive quarter. Maximum percentage of decline in net worth for one consecutive quarter Maximum percentage of decline in net worth for one consecutive quarter Refers to additional required amount of capital required to be maintained as a percent of loans serviced. Highest Level Of Capital Amount Plus Highest level of capital Refers to Mortgage loans serviced for Fannie Mae. Fannie Mae [Member] Refers to Mortgage loans serviced for Freddie Mac. Freddie Mac [Member] Refers to Mortgage loans serviced for Ginnie Mae. Ginnie Mae [Member] Ginnie Mae [Member] Refers to other mortgage loans serviced. Other Mortgage loans serviced [Member] Other [Member] Refers to maximum number of consecutive quarterly losses recorded for profitability requirement. Maximum number of consecutive quarterly losses recorded for profitability requirement 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 other mortgage loans service's principal balances. Schedule of Other Mortgage Loans Services Principal Balances [Table Text Block] Other mortgage loans service's principal balances 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 Tabular disclosure of an analysis of capitalized mortgage loan servicing rights. Schedule of capitalized mortgage loan servicing rights [Table Text Block] Schedule of capitalized mortgage loan servicing rights Tabular disclosure of troubled debt restructuring that subsequently defaulted. Troubled debt restructuring during the past twelve months that subsequently defaulted [Table Text Block] Troubled debt restructuring during the past twelve months that subsequently defaulted Credit ratings of of insurer or risk retention group counterparties [Abstract] Credit ratings of insurer or risk retention group counterparties [Abstract] Class of financing receivables related to partial refund payment plan receivable financing receivables. Payment Plan Receivable, Partial Refund Payment Plan Receivables, Partial Refund The percentage of outstanding payment plan receivables that a third party insurer or risk retention group is obligated to pay upon cancellation only with respect to the unearned portion previously funded to the administrator. Subsidiary Outstanding Payment Plan Insured By Third Party Two Subsidiary's payment outstanding payment plan 2, insured by third party Class of financing receivables related to full refund payment plan receivable financing receivables. Payment Plan Receivables, Full Refund Payment Plan Receivables, Full Refund Class of financing receivables related to other payment plan receivable financing receivables. Payment Plan Receivable, Other Assets Payment plan receivables, Other Total payment plan receivable. Payment Plan Receivable Total 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] 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] 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] Loan ratings/credit scores by loan class [Abstract] Accrued total interest included in recorded investment in loans at period end. Accrued interest included in recorded in investment in loans Accrued interest included in recorded investment Accrued interest included in total Represents the FICO score of loans by category. Credit score 550 to 599 550-599 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 500 to 549 500-549 Represents the FICO score of loans categorized as unknown. Unknown Represents the FICO score of loans by category. Credit score 600 to 649 600-649 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 Under 500 Under 500 Represents the FICO score of loans by category. Credit score 700 to 749 700-749 Represents the FICO score of loans by category. Eight hundreds and above 800 and above Total recorded investments by credit score. Credit score by investment Total 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] Not rated insurer or risk retention group counterparty. Not Rated [Member] The percentage of outstanding payment plan receivables that a third party insurer or risk retention group is obligated to pay. Subsidiary outstanding payment plan insured by third party Subsidiary's outstanding payment plan insured by third party Amount of interest that was recorded on non-performing loans. Non Performing Loan Interest Income Recorded Interest Income Aging analysis of loans by class [Abstract] Aging analysis of loans by 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 but unpaid interest. Excludes loans and leases covered under loss sharing agreements. Loans And Leases Receivable Recorded Investment Total loans recorded investment Amount of interest that would have been accrued if non-performing loans continued to accrue interest according to their original terms. Accrued Interest, Non-Performing Loan Accrued interest included in recorded investment Non performing loans [Abstract] Non performing loans [Abstract] Recorded investment in financing receivables that are past due and are not performing as per the loan agreement at the balance sheet date. Financing Receivable, Recorded Investment, Total Non Performing Loans Total Non-performing Loans Class of financing receivables related to other payment plan receivable financing receivables. Payment Plan Receivable Other [Member] Other [Member] Class of financing receivables related to partial refund payment plan receivable financing receivables. Payment Plan Receivable Partial Refund [Member] Partial Refund [Member] Class of financing receivables related to full refund payment plan receivable financing receivables. Payment Plan Receivables Full Refund [Member] Full Refund [Member] Financing receivables that are equal to or greater than 30 days past due. Financing Receivables, Equal to Greater than 30 Days Past Due [Member] Loans Past Due Total [Member] Amount of interest that would have been accrued if non-performing loans continued to accrue interest according to their original terms. Non Performing Loan Interest Income Accrued Interest Additions (deductions) [Abstract] Allowance for loan losses [Abstract] Accrued total interest included in recorded investment in impaired loans at period end. Accrued Interest, Impaired Loans Accrued interest included in recorded investment Impaired Loan With An Allocated Allowance [Abstract] Impaired loans with an allocated allowance [Abstract] Average recorded investment in and interest income earned on impaired loans by class [Abstract] Impaired loan with no allocated allowance [Abstract] Impaired loan with no allocated allowance [Abstract] Amount of troubled debt restructurings. Troubled Debt Restructuring, Amount TDR 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 Non-troubled debt restructured, allowance based on collateral. Non Troubled Debt Restructuring Allowance Based on Collateral Non - TDR - allowance based on collateral Troubled debt restructured with allowance based on the collateral Troubled Debt Restructuring Allowances Based on Collateral TDR - allowance based on collateral Troubled debt restructured, allowance based on present value cash flow. Troubled Debt Restructuring Allowances Based on Present Value Cash Flow TDR's 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 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 With no related allowance recorded Non-troubled debt restructured, allowance based on present value cash flow. Non Troubled Debt Restructuring Allowance Based on Present value Cash Flow Non - TDR - allowance based on present value cash flow Amount of allowance for loan losses allocated [Abstract] Total amount of allowance for loan losses allocated Allowance For Loan Losses Allocated Total amount of allowance for loan losses allocated 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 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 collateral. Troubled Debt Restructuring Allowance Based on Collateral TDR - allowance based on collateral Non-Troubled debt restructured allowance based on present value cash flow. Non Troubled Debt Restructuring Allowances Based On Present Value Cash Flow Non - TDR - allowance based on present value cash flow The adjusted total of all stockholders' equity (deficit) items. Stockholders Equity Attributable to Parent As Adjusted Balance at beginning of period, as adjusted The value of transfers to other liabilities held for sale in the period. Transfers to Other Liabilities Held for Sale Transfers to other liabilities held for sale The net cash outflow or inflow associated with sale of branch. Cash Paid For Received From Branch Sale Net cash paid for branch sale Amount of cash outflow due to purchase of portfolio loans. Payments To Acquire Portfolio Loans Purchase of portfolio loans The cash inflow associated with principal payments, prepayments and call (requests of early payments) on securities not classified as either held-to-maturity securities or trading securities which are classified as available-for-sale securities. Principal Payments Received On Available For Sale Securities Principal payments received on securities available for sale The cash inflow associated with the sale of the Federal Reserve Stock (equity interest in Federal Reserve Bank) and Federal Home Loan stock during the period. Proceeds From Sale Of Federal Reserve Stock And Federal Home Loan Stock Redemption of Federal Home Loan Bank and Federal Reserve Bank stock The value of transfers to payment plan receivables and other assets held for sale in the period. Transfers to Payment Plan Receivables and Other Assets Held for sale Transfers to payment plan receivables and other assets held for sale The value of payment plan receivables transferred to vehicle service contract counterparty receivables in the period. Transfer of payment plan receivables to vehicle service contract counterparty receivables The cash inflow associated with the collection of vehicle service contract counterparty receivables. Proceeds From The Collection Of Vehicle Service Contract Counterparty Receivables Proceeds from the collection of vehicle service contract counterparty receivables Cash Paid During the Period For [Abstract] Cash paid during the year for The net cash outflow or inflow for the increase (decrease) in the beginning and end of period vehicle service contract counterparty payables balances. Net Increase Decrease In Vehicle Service Contract Counterparty Payables Net decrease in vehicle service contract counterparty payables Purchase of securities available for sale not yet settled. Purchase of securities available for sale not yet settled Purchase of securities available for sale and interest bearing deposits - time not yet settled The cash inflow associated with maturities (principal being due) on securities not classified as either held-to-maturity securities or trading securities which are classified as available-for-sale securities. Proceeds From Maturity Of Available For Sale Securities Proceeds from the maturity of securities available for sale Amount of expense to be paid to settle a class litigation matter. Litigation Settlement, Expenses Litigation settlement expense Gain (loss) from sale of branches. Gain on Branch sale Net gain on branch sale Net gain on branch sale Amount of loss on sale of Mepco. Loss on Sale of Payment Plan Business Loss on sale of payment plan business Represents estimated losses incurred during the period relating to vehicle service contract counterparty receivables. Vehicle Service Contract Counterparty Contingencies Vehicle service contract counterparty contingencies The gain (loss) in earnings that represent the difference between sale price and carrying value of loans and Leases that were sold during the reporting period, the difference between fair value and carrying value of loans held for sale still held at period end and fair value of mortgage banking derivatives still held at period end. This does not include the cash proceeds of the sales. This is a noncash adjustment when calculating net cash generated by operating activities using the indirect method. Gain Loss On Sale Of And Fair Value Adjustments On Loans And Leases Net gains on mortgage loans Mortgage loans Disclosure of accounting policy for vehicle service contract counterparty receivables. VEHICLE SERVICE CONTRACT COUNTERPARTY RECEIVABLES, NET [Policy Text Block] VEHICLE SERVICE CONTRACT COUNTERPARTY RECEIVABLES, NET Disclosure of accounting policy for capitalized mortgage loan servicing rights. Capitalized Mortgage Loan Servicing Rights [Policy Text Block] CAPITALIZED MORTGAGE LOAN SERVICING RIGHTS The entire policy disclosure represents an equity interest in the Federal Reserve Bank. It does not have a readily determinable fair value because its ownership is restricted and it lacks a market (liquidity). FEDERAL RESERVE BANK STOCK [Policy Text Block] FEDERAL RESERVE BANK ("FRB") STOCK Disclosure of accounting policy for interest bearing deposits. INTEREST BEARING DEPOSITS [Policy Text Block] INTEREST BEARING DEPOSITS Disclosure of accounting policy for other real estate and repossessed assets. Other Real Estate and Repossessed Assets [Policy Text Block] OTHER REAL ESTATE AND REPOSSESSED ASSETS Disclosure of accounting policy for payment plan receivable revenue recognition. PAYMENT PLAN RECEIVABLE REVENUE RECOGNITION [Policy Text Block] PAYMENT PLAN RECEIVABLE REVENUE RECOGNITION The entire policy disclosure represents an equity interest in the Federal Home Loan Bank. It does not have a readily determinable fair value because its ownership is restricted and it lacks a market (liquidity). Federal Home Loan Bank, Advances Policy Text Block [Policy Text Block] FEDERAL HOME LOAN BANK ("FHLB") STOCK Disclosure of accounting policy for bank owned life insurance. BANK OWNED LIFE INSURANCE [Policy Text Block] BANK OWNED LIFE INSURANCE Disclosure of accounting policy for payment plan receivables and other assets held for sale. Payment Plan Receivables and Other Assets Held for Sale [Policy Text Block] PAYMENT PLAN RECEIVABLES AND OTHER ASSETS HELD FOR SALE Represents the aggregate amount of funds due from counterparties for cancelled service contracts, net of any reserves. Vehicle Service Contract Counterparty Receivables Net Vehicle service contract counterparty receivables, net Balance at beginning of year, net of reserve Balance at end of year, net of reserve Refers to payment plan receivables and other assets held-for-sale relating to the sale of Mepco. Payment Plan Receivables And Other Assets Held For Sale Payment plan receivables and other assets held for sale Represents carrying amount of vehicle service contract payment plans purchased from counterparties, net of discount. Payment Plan Receivables Payment plan receivables Payment plan receivables Amount before allowance of consumer mortgage. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements. Loans and Leases Receivable, Mortgage Mortgage Amount classified as liabilities attributable to the sale of Mepco. Liabilities Held for Sale Other liabilities held for sale Pre tax reclassification adjustment for the accretion on settled derivative instruments that was realized in net income during the period. Other Comprehensive Income (Loss), Reclassification Adjustment For Accretion on Settled Derivatives Reclassification adjustment for accretion on settled derivatives 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 Before tax amount of the income statement impact of the reclassification adjustment for other than temporary impairment included in earnings. Other Comprehensive Income Loss, Reclassification Adjustment for Other Than Temporary Impairment Portion Recognized in Earnings, Net, Available-for-sale Securities Reclassification adjustment for other than temporary impairment included in earnings Aggregate dividends declared and during the period for each share of common stock outstanding. Cash Dividends Declared and Paid Per Common Share Cash dividends declared and paid per common share (in dollars per share) Non interest provision for loss reimbursement on sold loans. Provision for loss reimbursement on sold loans Loss reimbursement on sold loans 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 Amount of expense related to debit card transactions. Interchange Expense Interchange expense The amount of expenses incurred in the period for data processing services and related costs. Data Processing Data processing Represents interchange fees earned on debit card transactions. Interchange Income Interchange income Charges in the period for credit card and bank service fees. Credit Card and Bank Service Fees Credit card and bank service fees Bank is required to maintain reserve balances in the form of vault cash and non-interest earning balances with the FRB. The amount refers to average reserve balances to be maintained. Average reserve balances to be maintained Average reserve balances maintained Cash balances held related to investment security transactions and merchant payment processing operations. Reserve balances related to investment security transactions and merchant payment processing operations Reserve balances related to investment security transactions and merchant payment processing operations Tabular disclosure of summary of reciprocal deposits. Summary of reciprocal deposits [Table Text Block] Summary of reciprocal deposits Tabular disclosure of maturity of time deposits. Summary of maturity of time deposits [Table Text Block] Summary of maturity of time deposits Tabular disclosure of interest expense on deposits. Summary of interest expense on deposits [Table Text Block] Summary of interest expense on deposits Tabular disclosure of other borrowings. Summary of other borrowings [Table Text Block] Summary of other borrowings Tabular disclosure of maturity dates and weighted average interest rates of federal home loan bank advances. Schedule of maturity dates and weighted average interest rates of federal home loan bank advances [Table Text Block] Schedule of maturity dates and weighted average interest rates FHLB Tabular disclosure of repayments of federal home loan bank advances. Schedule of repayments of federal home loan bank advances [Table Text Block] Schedule of repayments of federal home loan bank advances Refers to the outstanding amount borrowed during the period from the Federal Reserve Bank. Federal Reserve Bank, Amount Outstanding During Period Borrowings outstanding Assets, including available for sale securities, pledged to secure borrowings. Assets Pledged As Collateral Available for sale and loans, pledged to secure other borrowings Represents minimum percentage of unpaid principal balance of FHLB advances that needs to be held in the form of federal home loan bank stock. Federal Home Loan Bank Stock As Percentages Of Outstanding Advances FHLB stock as percentages of outstanding advances Hair cut percentage used on qualifying mortgage and home equity loan collateral. Federal Home Loan Bank Advances Home Equity Collateral Federal home loan bank, advances, interest rate Federal Reserve Bank Borrowings [Abstract] Federal reserve bank borrowings [Abstract] Represents minimum percentage of unpaid principal balance of residential mortgage loans that needs to be held in the form of federal home loan bank stock. Federal Home Loan Bank Stock As Percentages Of Unpaid Principal Balance FHLB stock as percentages of unpaid principal balance Refers to federal home loan bank (FHLB) fixed interest rate advances. Federal Home Loan Bank, Advances, Fixed Rate [Member] Fixed-Rate Advances [Member] Summary of other borrowings [Abstract] The carrying amount on the balance sheet date for the aggregate of borrowings owed by the reporting entity that may include Treasury Tax and Loan or other borrowings not otherwise defined in the taxonomy. Borrowings Other The weighted average interest rate applicable to the Federal Home Loan Bank advances which are due as of the balance sheet date. Federal Home Loan Bank, Advances, Maturities Summary, Average Interest Rate of Amounts As of Balance Sheet Date Total FHLB advances, Rate Amount of advances or credit lines available from the Federal Reserve Bank. Federal Reserve Bank, Advances, General Debt Obligations, Amount of Available, Unused Funds Unused borrowing capacity with the FRB Amount of residential real estate included in foreclosed assets. Foreclosed Residential Real Estate Foreclosed residential real estate Carrying amount of other assets taken in settlement of troubled loans. Other Repossessed Assets Other repossessed assets Disposals of real estate assets taken in settlement of troubled loans through surrender or foreclosure. Other Real Estate, Acquired Disposals Sales of other real estate Carrying amount of other real estate assets taken in settlement of troubled loans through surrender or foreclosure. Other Real Estate, Acquired Balance at end of year, net of valuation allowance Balance at beginning of year, net of valuation allowance Valuation adjustments made to real estate assets taken in settlement of troubled loans through surrender or foreclosure. Other Real Estate, Acquired Valuation Adjustments Additions to valuation allowance charged to expense Additions of real estate assets taken in settlement of troubled loans through surrender or foreclosure. Other Real Estate, Acquired Additions Loans transferred to other real estate Securities Disclosures [Abstract] 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 The net book value of securities were pledged to secure borrowings, public deposits and for other purposes as required by law. Book Value Of Pledged Securities Pledged securities with book value Realized gain related to U.S. Treasury short position. Realized gain related to U.S. Treasury short position Realized gain related to U.S. Treasury short position Trust preferred securities that are not rated. Unrated Issues No OTTI [Member] Unrated Issues [Member] 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 The amount of credit related other than temporary impairments recognized in earnings. Credit Related OTTI Recognized in Earnings 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 residential mortgage backed, without Single Maturity Date, Amortized Cost Basis Private label residential mortgage-backed Private label residential mortgage-backed securities that are super senior securities. Super Senior Security [Member] Private label residential mortgage-backed securities that are senior securities. Senior Security [Member] Private label residential mortgage-backed securities that are senior support securities. Senior Support Security [Member] 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 residential mortgage backed, Debt Maturities, without Single Maturity Date, Fair Value Private label residential mortgage-backed Trust preferred securities that are rated. Rated Issues [Member] Rated Issues [Member] 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 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 Total debt maturities at fair value. Debt Maturities at Fair Value Total Total debt maturities at amortized cost basis. Debt Maturities at Amortized Cost Total 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 number of private label mortgage backed securities with OTTI with unrealized loss. Private Label Mortgage Backed Securities With OTTI Unrealized Loss Number of private label mortgage backed securities currently below investment grade with OTTI unrealized loss The number of private label mortgage backed securities with OTTI unrealized loss less than previously recorded credit OTTI amount. Private Label Mortgage Backed Securities Unrealized Loss Less Than OTTI Credit Number of private label mortgage backed securities with OTTI unrealized loss less than previous OTTI credit The number of securities rated below investment grade by rating agency. Number of securities rated below investment grade Number of securities rated below investment grade The number of private label mortgage backed securities with OTTI with unrealized gain. Private Label Mortgage Backed Securities With OTTI Unrealized Gains Number of private label mortgage backed securities currently with OTTI unrealized gains The number of major credit rating agencies rating individual securities during the period with fair value less than amortized cost. Number Of Major Credit Rating Agencies Rating Securities With Fair Value Less Than Amortized Cost Number of major credit rating agencies rating securities with fair value less than amortized cost Number of investment positions in available-for-sale investments in a continuous unrealized loss position for which an other-than-temporary impairment (OTTI) has not been recognized in the income statement that were purchased prior to 2016. Number of securities purchased prior to 2016 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 private label mortgage backed securities that are forecasted to have complete recovery of cost basis. Private Label Mortgage Backed Securities Complete Recovery of Cost Basis Number of private label mortgage backed securities complete recovery of cost basis Private Label Mortgage Backed Securities Below Investment Grade [Abstract] Unrealized gain on private label mortgage backed securities currently below investment grade with credit related OTTI. Private Label Mortgage Backed Securities Currently Below Investment Grade With Credit Related O T T I Unrealized Gains Unrealized gain Fair value of private label mortgage backed securities currently below investment grade with credit related OTTI. Fair Value Private Label Mortgage Backed Securities Currently Below Investment Grade With Credit Related O T T I Fair value Non-credit unrealized losses on private label mortgage backed securities currently below investment grade with credit related OTTI. Private Label Mortgage Backed Securities Currently Below Investment Grade With Credit Related O T T I Non Credit Unrealized Losses Non-credit unrealized loss Amortized cost of private label mortgage backed securities currently below investment grade with credit related OTTI. Private Label Mortgage Backed Securities Currently Below Investment Grade With Credit Related O T T I Amortized Cost Amortized cost The amount of calculated credit related OTTI on private label mortgage backed securities. Private Label Mortgage Backed Securities Currently Below Investment Grade Cumulative Credit Related O T T I Cumulative credit related OTTI 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 The percentage of excess impairments on rated bonds. Percentage of excess impairment on bonds Percentage of excess impairment on securities The number of impaired bonds. Number of bonds with impairment in excess of ten percent Trust preferred securities [Abstract] Trust preferred securities [Abstract] Fair value of trust preferred securities. Trust Preferred Security Fair Value Fair Value Net unrealized gain/loss on trust preferred securities. Trust Preferred Security Net Unrealized Gain Loss Net Unrealized Loss The number of bonds with impairment for more than 12 months. Number of Bonds with Impairment For More Than 12 Months Number of securities with impairment for more than 12 months Percentage of consolidated shareholders' equity to compare against investment obligations of state and political subdivisions. State And Political Subdivision Shareholders' Equity Threshold Shareholder equity threshold not exceeded by revenue or taxing authority amount Refers to the amount of payment plan receivables and commercial loans held for sale. Payment Plan Receivables And Commercial Loans Held For Sale Payment plan receivables and commercial loans held for sale Estimated recorded book balance and fair value [Abstract] Estimated fair values and recorded book balances [Abstract] 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 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 Amount of all domestic deposit liabilities with no stated maturity. Domestic Deposit Savings No Stated Maturity Deposits with no stated maturity 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 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 Tabular disclosure of private label residential mortgage backed securities below investment grade that had credit related OTTI. Schedule Of Private Label Residential Mortgage Backed Securities Below Investment Grade With Credit Related OTTI [Text Block] Private label residential mortgage backed securities below investment grade Refers to concentration of credit risk to health care and social assistance. Health Care and Social Assistance [Member] Refers to concentration of credit risk to construction and development loans. Construction and Development Loans [Member] Refers to concentration of credit risk to lessor residential real estate. Lessors of Residential Real Estate [Member] Refers to concentration of credit risk to construction general contractors and land development. Construction General Contractors And Land Development [Member] Construction General Contractors and Land Development [Member] Refers to concentration of credit risk to lessor nonresidential real estate. Lessors of Nonresidential Real Estate [Member] Tabular disclosure of the change in other real estate on properties owned taken in settlement of troubled loans through surrender or foreclosure by banks. Other Real Estate, Roll Acquired Forward [Text Block] Summary of other real estate activity Tabular disclosure of the change in real estate valuation allowance. Other Real Estate Valuation Allowance Roll Forward [Table Text Block] Valuation allowance for other real estate owned 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 Completed securities trade of a shorted U.S. Treasury security. Completed securities trade Refers to written options relating to Altitude CD product. Written Options [Member] Represents fair value of amended warrant that was reclassified into shareholders' equity during the period. Fair Value Of Amended Warrant Reclassified Into Shareholders Equity Fair value of amended warrant was reclassified into shareholders' equity Mandatory commitments to sell mortgage loans derivative financial instrument. Mandatory Commitments to Sell Mortgage Loans [Member] Mandatory Commitments to Sell Mortgage Loans [Member] Refers to purchased options relating to Altitude CD product. Purchased Options [Member] Termination fees associated with pay-fixed interest rate swaps. Termination fee Pay Fixed Interest Rate Swap Termination fee Refers to request for approval to transfer of capital from bank to parent entity. Transfer Of Capital From Bank To Parent Entity Request Request for approval to transfer capital from bank to parent entity The cumulative amount of the subsidiary reporting entity's undistributed earnings or deficit. Retained Earnings Accumulated Deficit Subsidiary Undivided profits Components of regulatory capital [Abstract] 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] Common Equity Tier One Capital [Abstract] Common equity tier 1 capital to risk-weighted assets [Abstract] The minimum amount of Common Equity Tier 1 Capital required for capital adequacy purposes under the regulatory framework for prompt corrective action. Common Equity Tier One Capital Required For Capital Adequacy Minimum for Adequately Capitalized Institutions, Amount The amount of Common Equity Tier 1 Capital required to be categorized as well capitalized under the regulatory framework for prompt corrective action. Common Equity Tier One Capital Required To Be Well Capitalized Minimum for Well-Capitalized Institutions, Amount Common Equity Tier 1 Capital divided by risk weighted assets as defined by regulations. Common Equity Tier One Capital To Risk Weighted Assets Actual, Ratio Common Equity Tier 1 Capital as defined in the regulations. Common Equity Tier One Capital Actual, Amount Common equity tier 1 capital The minimum Common Equity Tier One Capital Ratio (Tier one capital divided by risk-weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action. Common Equity Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets Minimum for Adequately Capitalized Institutions, Ratio The Common Equity Tier 1 capital ratio (Tier 1 capital divided by risk weighted assets) required to be categorized as "well capitalized" under the regulatory framework for prompt corrective action. Common Equity Tier One Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets Minimum for Well Capitalized Institutions, Ratio Add (deduct) [Abstract] Add (deduct) [Abstract] Deferred tax assets not qualifying as Tier 1 capital. Disallowed Deferred Tax Assets, Tier 1 Capital Disallowed deferred tax assets Deferred tax assets not qualifying as common equity Tier 1 capital. Disallowed Deferred Tax Assets Disallowed deferred tax assets Trust preferred securities qualifying as Tier 1 capital. Qualifying Trust Preferred Securities Qualifying trust preferred securities Capitalized mortgage loan servicing rights not qualifying as Tier 1 capital. Disallowed Capitalized Mortgage Loan Servicing Rights Disallowed capitalized mortgage loan servicing rights 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 loan losses and allowance for unfunded lending commitments limited to 1.25% of total risk-weighted assets Including the current and noncurrent portions, the carrying value of preferred securities trust that embody an unconditional obligation requiring the issuer to redeem the securities by transferring the funds at a specified or determinable date (or dates) or upon an event that is certain to occur, that are issued by a consolidated trust to outside investors where the trust uses the proceeds of the issuance of those securities to purchase, from the financial institution that established the trust on balance sheets date. Trust Preferred Securities Trust preferred securities Represents maximum period within which issuance costs have been capitalized and amortized on straight-line basis in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Maximum period within which issuance costs have been capitalized and amortized on straight line basis Maximum period within which issuance costs have been capitalized and amortized on straight line basis The amount of discount associated with securities redeemed. Discount Allocation To Securities Redeemed Trust preferred securities redeemed at discount Summary of subordinated debentures and trust preferred securities [Abstract] Date when the debt instrument is scheduled to be redemption, in CCYY-MM-DD format. Debt Instrument Redemption Date First Permitted Redemption Date For an issue of Subordinated Debentures, maximum distribution deferral period (payments of interest). Distribution Deferral Period Subordinated Debentures Distribution deferral period, maximum quarters Summary of information regarding subordinated debentures [Abstract] Aggregate stated amount of common stock issued by trusts. Common Stock Issued By Trust Common Stock Issued Subsidiaries trust which is controlled, directly or indirectly, by its parent. The usual condition for control is ownership of a majority (over 50%) of the outstanding voting stock. The power to control may also exist with a lesser percentage of ownership, for example, by contract, lease, agreement with other stockholders or by court decree. Subsidiaries Trust Four [Member] Midwest Guaranty Trust I [Member] Subsidiaries trust which is controlled, directly or indirectly, by its parent. The usual condition for control is ownership of a majority (over 50%) of the outstanding voting stock. The power to control may also exist with a lesser percentage of ownership, for example, by contract, lease, agreement with other stockholders or by court decree. Subsidiaries Trust Two [Member] IBC Capital Finance III [Member] Subsidiaries trust which is controlled, directly or indirectly, by its parent. The usual condition for control is ownership of a majority (over 50%) of the outstanding voting stock. The power to control may also exist with a lesser percentage of ownership, for example, by contract, lease, agreement with other stockholders or by court decree. Subsidiaries Trust Three [Member] IBC Capital Finance IV [Member] Refers to Shareholder ownership percentage maximum relating to a tax benefits preservation plan. Shareholders ownership percentage Shareholders with certain limited exceptions Refers to the level of beneficial ownership that will trigger the exercisability of a Right. Beneficial Ownership Level Beneficial ownership level The percentage share authorized to be repurchased under a stock repurchase plan. Stock Repurchase Program Percentage Of Shares Authorized To Be Repurchased Stock repurchase program percentage of shares authorized to be repurchased 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) Refers to number of weighted average performance stock units. Weighted Average Number Of Performance Shares Stock Performance share units (in shares) The entire disclosure for the components of other non-interest expense. Other Non-interest Income [Text Block] OTHER NON-INTEREST INCOME Tabular disclosure of the detailed components of other noninterest income. May include methodology, assumptions and amounts for noninterest income items. Schedule of other non-interest income [Table Text Block] Schedule of other non-interest income Amount of other non-interest income which are not separately presented in any other noninterest income category. Other Miscellaneous Non Interest Income Other Amount of income earned from ATM cards. Fees ATM Cards ATM fees Amount of commissions on investment and insurance products. Investment and Insurance Commissions Investment and insurance commissions Other real estate rental income. Other Real Estate Rental Income Other real estate rental income Gain on mortgage loans. Net Mortgage Loan Gains [Member] Mortgage Loan Gains [Member] Fair value of U.S. treasury warrants. (Increase) Decrease in Fair Value of U.S. Treasury Warrants [Member] Decrease in Fair Value of U.S. Treasury Warrants [Member] Effect Of Derivative Financial Instruments On Consolidated Financial Statements Of Operations [Abstract] Effect of derivative financial instruments on the consolidated financial statements of operations [Abstract] Refers to U.S. Treasury short position member. U.S. Treasury short position [Member] A reserve for the estimated amount of expense related to vehicle service contract counterparty receivable. Vehicle Service Contract Counterparty Reserve [Member] The contract value of financial standby letters of credit, which are not recognized in the financial statements (off-balance sheet). Contract Disclosure Off Balance Sheet Risks Amount Financial instruments risk represented by contract amounts The amount refers to class notification costs and certain other estimated expenses. Notification Costs And Other Estimated Expenses Notification costs and other estimated expenses Refers to variable rate on standby letters of credit. Contract Disclosure Off Balance Sheet Risks Liability Variable Rate Variable interest rate Reserve balance as of the reporting date for loss reimbursements on sold mortgage loans. Reserve For Loss Reimbursement On Sold Loans Reserve for loss reimbursements on sold mortgage loans A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. Vehicle service contract counterparty receivable [Roll Forward] Reserve balance as on reporting date against counterparty receivable. Reserve Reserve at end of year Represents estimated losses incurred during the period relating to vehicle service contract counterparty receivables. Vehicle Service Contract Counterparty Contingencies Expense Reserves (established) reversed and charge-offs recorded to expense Cash received during the period from the counterparty receivable. Cash received Cash received Transferred to (from) contingency reserves during the period. Transferred to (from) contingency reserves Transferred from contingency reserves Reserve established on previously charged-off receivable during the period. Reserve Established On Previously Charged Off Receivable Reserve established on previously charged-off receivable Amount transferred during the period from the payment plan receivable to counterparty receivable. Transfers in from payment plan receivables Recovery of previously charged-off receivable during the period. Recovery of Previously Charged Off Receivable Recovery of previously charged-off receivable Represents transfer to held for sale incurred during the period relating to vehicle service contract counterparty receivables. Vehicle Service Contract Transfer to Held For Sale Transfer to held for sale Represents a reserve on the remaining balance of a promissory note from one of the Company's counterparties. Reserve On Counterparty Promissory Notes Full reserve on the remaining balance The installment payment period for service contract purchased by consumer. Installment payments period for service contract Amount of deferred tax liability net of tax amount of unrealized holding gain (loss) after reclassification adjustments and transfers on available-for-sale securities. Deferred Tax Liabilities, Unrealized Gain On Securities Available For Sale Unrealized gain on securities available for sale Amount of deferred tax liability attributable to taxable temporary differences from capitalized mortgage loan servicing rights. Deferred Tax Liabilities Capitalized Mortgage Loan Servicing Rights Capitalized mortgage loan servicing rights The unrealized excess benefits on share-based compensation for which a benefit will be recorded to additional paid in capital when realized. Unrealized Excess Tax Benefit Share Based Compensation Operating Loss Carry Forward NOL Unrealized excess benefits on share-based compensation Refers to alternative minimum tax credit carryforwards with indefinite lives. Alternative Minimum Tax Credit Carryforwards With Indefinite Lives Minimum tax credit carryforwards with indefinite lives Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from loss reimbursement on sold loans reserve. Deferred Tax Assets, Loss reimbursement on sold loans reserve Loss reimbursement on sold loans reserve Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from other than temporary impairment charge on securities available for sale. Deferred Tax Assets, Other than temporary impairment charge on securities available for sale Other than temporary impairment charge on securities available for sale Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from vehicle service contract counterparty contingency reserve. Deferred Tax Assets, Vehicle Service Contract Counterparty Contingency Reserve Vehicle service contract counterparty contingency reserve Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from reserve for unfunded lending commitments. Deferred Tax Assets, Reserve for Unfunded Lending Commitments Reserve for unfunded lending commitments Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from valuation allowance on other real estate. Deferred Tax Assets Valuation Allowance On Other Real Estate Valuation allowance on other real estate Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from purchase premiums, net. Deferred Tax Assets, Purchase Premiums Net Purchase premiums, net Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from non accrual loan interest income. Deferred Tax Assets, Non Accrual Loan Interest Income Non accrual loan interest income Amount of deferred tax liability attributable to taxable temporary differences from federal home loan bank stock. Deferred Tax Liabilities, Federal Home Loan Bank stock Federal Home Loan Bank stock The portion of the difference between total income tax expense or benefit as reported in the Income Statement for the period and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations attributable to changes in unrecognized tax benefits. Income tax reconciliation unrecognized tax benefits Unrecognized tax benefit Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to (deductible) or nondeductible equity-based compensation costs. Effective Income Tax Rate Reconciliation, Share-based Compensation Cost, Excess (Benefit) Deficit Amount Share-based compensation Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to the tax effect of Bank Owned Life Insurance. Effective Income Tax Rate Reconciliation, Bank Owned Life Insurance, Income Tax Effect Amount Bank owned life insurance Amount of deferred tax liability attributable to taxable temporary differences from deferred loan origination fees and costs. Deferred Tax Liabilities Deferred Expense Deferred Loan Origination Fees Costs Deferred loan fees The component of income tax expense for the period representing the increase (decrease) in the entity's establishment of valuation allowance pertaining to continuing operations. Establishment of Valuation Allowance Valuation allowance - change in estimate Operating Loss Carryforward [Abstract] Operating loss carryforwards [Abstract] The sum of domestic, foreign and state and local operating loss carryforwards, before tax effects, available to reduce future taxable income under enacted tax laws for period two. Operating Loss Carryforwards, Period Two 2032 The sum of domestic, foreign and state and local operating loss carryforwards, before tax effects, available to reduce future taxable income under enacted tax laws for period one. Operating Loss Carryforwards, Period One 2031 Tabular disclosure of Analysis of vehicle service contract counterparty receivable. Analysis of vehicle service contract counterparty receivable [Table Text Block] Analysis of vehicle service contract counterparty receivable Tabular disclosure of Analysis of vehicle service contract counterparty reserve. Analysis of vehicle service contract counterparty reserve [Table Text Block] Analysis of vehicle service contract counterparty reserve Tabular disclosure of subordinated debentures and trust preferred securities. Schedule of subordinated debentures and trust preferred securities [Table Text Block] Schedule of subordinated debentures and trust preferred securities Document and Entity Information [Abstract] Amount of disproportionate tax effects from cash flow hedges. Accumulated Other Comprehensive Income Loss Disproportionate Tax Effects From Cash Flow Hedges [Member] Disproportionate Tax Effects from Cash Flow Hedges [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] Accumulated net gain or loss from settled derivatives. Accumulated Net Gain Loss From Settled Derivatives [Member] Unrealized Losses on Settled Derivatives [Member] BRANCH SALE [Abstract] The entire disclosure for information related branch sale. Branch sale related information [Text Block] BRANCH SALE Schedule of location of branches. Schedule Of Branch Location [Table] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Branch Location [Line Items] Gross amount of all deposit liabilities held by the entity, including foreign and domestic, interest and noninterest bearing; may include demand deposits, saving deposits, Negotiable Order of Withdrawal (NOW) and time deposits among others, net of adjustments. Deposits, Gross Total deposit liabilities The cash inflow from the sale of real property and fixed assets. Proceeds from Sale of Real Property and Fixed Assets Proceeds from Real property and fixed assets Refers to percentage of average deposit liabilities. Percentage of average deposit liabilities Percentage of average deposit liabilities The net book value of the real property and fixed assets related to branch sale. Net Book Value of Real Property and Fixed Assets Related to Branch Sale Net book value of real property and fixed assets Amount of the payment of deposit premium on core deposits. Deposit Premium on Identified Core Deposits Premium payment amount Refers to number of days in period to calculate average deposit liabilities. Number of Days For Average Deposit Liabilities Average days for deposit liabilities Refers to number of business days prior to closing date. Number of business days prior to closing date Number of business days prior to closing date Average deposit liabilities based on 20 day period held by the entity. Deposit Liabilities Based On Twenty Day Period Average deposit liabilities Refers the branch of bank to be sold. Midland Michigan [Member] Midland Branch [Member] Refers to certain other assets related to the sale of the payment plan receivables processing business. Payment Plan Receivable Certain Other Assets Payment plan receivables, certain other assets Refers to percentage of loan portfolio which was secured by real estate as on balance sheet date. Percentage of loan portfolio secured by real estate Percentage of loan portfolio secured by real estate Number of consecutive payments for mortgage loans and the borrower's capacity to repay the loan and collateral values appear insufficient for each loan class. Number of consecutive payments for mortgage loans misses Number of past due days for commercial loan, installment loans and payment plan receivables when accrual of interest income is discontinued. Number of past due days for commercial loan, installment loans and payment plan receivables Number of past due days for commercial loan, installment loans and payment plan receivables A plan offered by a corporation that allows investors to reinvest their cash dividends by purchasing additional shares or fractional shares on the dividend payment date. Dividend Reinvestment Plan [Member] A reward system designed to improve employees' long-term performance by providing rewards that may not be tied to the entity's share price. long term incentive plans [Member] Long-Term Incentive Plans [Member] Bank Owned Life Insurances [Abstract] Bank Owned Life Insurance [Abstract] Number of lives of group flexible premium non-participating variable life insurance contract that the company purchased. Group Flexible Premium Non-Participating Variable Life Insurance Contract Number of lives of group flexible premium non-participating variable life insurance contract Mortgage Loan Servicing Rights [Abstract] Mortgage Loan Servicing Rights [Abstract] Fees from servicing mortgage loans that have been sold. Mortgage Loan Servicing Fees Mortgage loan servicing fees Accounting Standards Update 2016-09, Compensation - Stock Compensation (718) Improvements to Employee Share-Based Payment Accounting. Accounting Standards Update 201609 [Member] ASU 2016-09 [Member] Other Intangible Assets [Abstract] Payment Plan Receivables [Abstract] Restatement Of Prior Year Financial Position [Abstract] Cumulative Effect Adjustments to Condensed Consolidated Statement of Financial Position [Abstract] Represents the unrealized excess benefit associated with certain share-based compensation. Unrealized Excess Benefits Associated With Share-based Compensation Unrealized excess benefits on share based compensation The increase (decrease) during the reporting period related to the impact of making an accounting policy election to account for forfeitures as they occur after consideration of deferred taxes. Increase Decrease in Equity After Consideration of Deferred Taxes Impact to equity after consideration of deferred taxes Refers to the cumulative effect adjustment related to the impact of making an accounting policy election to account for forfeitures as they occur. Forfeiture Cumulative Effect Adjustment Forfeiture provision The recognized tax benefit related to excess compensation benefits for equity-based payment arrangements during the period. Employee Service Share-based Compensation, Tax Benefit from Excess Compensation Expense Income tax expense (benefit) Disclosure of information related to payments of plan receivables and other assets held for sale. Payment Plan Receivables And Other Assets Held For Sale [Table] Line items represent information related to payments of plan receivables and other assets held for sale. Payment Plan Receivables And Other Assets Held For Sale [Line Items] Refers to liabilities to be assumed related to the sale of the payment plan receivable processing business. Payment Plan Receivable, Liabilities Assumed Payment plan receivables, liabilities assumed Loan Revenue Recognition [Abstract] Expenditures for employee health care and life insurance benefits as provided for compensation. Employee Compensation Benefit Health Care And Life Insurance Expense Health care and life insurance expense Represents the expense recognized during the period arising from compensation arrangements for performance programs with employees, directors and certain consultants qualifying for treatment as employees. Incentive Based Compensation Expense Performance-based compensation expense 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] Senior officers of the entity. Senior Officers [Member] Aggregate intrinsic value [Abstract] Aggregate Intrinsic Value [Abstract] Number of new stock units or restricted shares issued during the period. Stock Units Or Restricted Shares Issued During Period Number of restricted stock units issued to executive officers (in shares) 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) Name of the equity-based compensation arrangement plan, in Q2 changed name from Performance based compensation plan to Long-term incentive plan. Performance Based Compensation Plan [Member] Long-term incentive plan [Member] Percentage of employees' contribution to a defined contribution plan. Employee Matching Contribution Percentage Employee matching contribution, percentage This item represents the percentage of contributions during the period made by the entity to the Employee Stock Ownership Plan (ESOP). Employee Stock Ownership Plan E S O P Contributions To E S O P Employee stock ownership plan (ESOP), contributions