Short-term Federal Home Loan Bank advances Interest Expense, Federal Home Loan Bank and Federal Reserve Bank Advances, Short-Term Investment Securities Investment, Policy [Policy Text Block] Debt and Equity Securities, FV-NI [Line Items] Debt and Equity Securities, FV-NI [Line Items] Number of banks customers can execute interest rate swaps with Credit Risk Participation Agreements, Number Of Banks Credit Risk Participation Agreements, Number Of Banks Award Timing Predetermined Award Timing Predetermined [Flag] ESOP related expenses (Percent) Effective Income Tax Rate Reconciliation, Tax Expense (Benefit), Share-Based Payment Arrangement, Percent Tax effect OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment, Tax Entity File Number Entity File Number Additional Paid-in Capital Additional Paid-in Capital [Member] HTC Effective Income Tax Rate Reconciliation, Tax Credits, Historic Tax Credits Effective Income Tax Rate Reconciliation, Tax Credits, Historic Tax Credits Post retirement liability outstanding Postemployment Benefits Liability Tax credits Effective Income Tax Rate Reconciliation, Tax Credit, Amount Tabular List, Table Tabular List [Table Text Block] Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Summary of Related Party Loan Activity Schedule of Related Party Transactions [Table Text Block] Provision (Reversal) Financing Receivable, Excluding Accrued Interest, Credit Loss, Expense (Reversal), Including Lending Commitments Financing Receivable, Excluding Accrued Interest, Credit Loss, Expense (Reversal), Including Lending Commitments Summary of Fair Values of Company's Financial Instruments Fair Value, by Balance Sheet Grouping [Table Text Block] Demand deposit accounts Noninterest-Bearing Deposit Liabilities, Domestic Commercial and industrial Commercial And Industrial Portfolio Segment [Member] Commercial and industrial. Measurement Basis [Axis] Measurement Basis [Axis] 2026 Federal Home Loan Bank, Advance, Maturity, Average Interest Rate, Year One Adjustment to Compensation: Adjustment to Compensation [Axis] Related Party Transactions Related Party Transactions Disclosure [Text Block] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Mortgage loans sold to Federal National Mortgage Association without recourse Federal National Mortgage Association Certificates and Obligations (FNMA) [Member] Stock-based compensation Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-Based Compensation Cost Financing Receivable Portfolio Segment [Domain] Financing Receivable Portfolio Segment [Domain] Recoveries Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery Debt issuance as a percentage of aggregate principal (as percent) Debt Instrument, Issuance Discount Or Premium, Percentage Of Aggregate Principal Debt Instrument, Issuance Discount Or Premium, Percentage Of Aggregate Principal Current Current Income Tax Expense (Benefit) Adjustment to Compensation, Amount Adjustment to Compensation Amount Principles of Consolidation Consolidation, Policy [Policy Text Block] Non-cash compensation Share-Based Payment Arrangement, Noncash Expense Derivative asset - notional amount Derivative Asset, Notional Amount Maximum option term (in years) Share Based Compensation Arrangement By Share Based Payment Award Options Contractual Term Maximum Share based compensation arrangement by share based payment award options contractual term maximum. Stock options Share-Based Payment Arrangement, Option [Member] Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Period of separation from service (in months) Maximum Period Of Separation For Distribution Of Vested Portion Maximum period of separation for distribution of the vested portion. Cash and Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Effective Income Tax Rate Reconciliation, Percent [Abstract] Effective Income Tax Rate Reconciliation, Percent [Abstract] Beginning Balance Ending Balance Financing Receivable, Allowance For Credit Loss, Excluding Accrued Interest, Including Lending Commitments Financing Receivable, Allowance For Credit Loss, Excluding Accrued Interest, Including Lending Commitments Percentage of gross unrealized losses (as percent) Percentage Of Individual Securities With Unrealized Losses Percentage of individual securities with unrealized losses. Cash dividends declared Dividends, Common Stock, Cash Total Shareholders’ Equity Beginning balance Ending balance Shareholders’ equity Equity, Attributable to Parent Measurement Frequency [Axis] Measurement Frequency [Axis] Debt Securities, Available-for-Sale [Table] Debt Securities, Available-for-Sale [Table] Other Comprehensive Income Other Comprehensive Income (Loss), Net of Tax [Abstract] Insider Trading Policies and Procedures [Line Items] Summary of Office Properties and Equipment Property, Plant and Equipment [Table Text Block] Common stock, shares authorized (in shares) Common Stock, Shares Authorized Recurring Fair Value, Recurring [Member] Tier 1 leverage capital, To Be Well Capitalized Under Prompt Corrective Action Provisions, amount Banking Regulation, Tier 1 Leverage Capital, Well Capitalized, Minimum Derivatives Deferred Tax Liabilities, Derivatives Common equity tier 1 capital ratio, To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount Banking Regulation, Common Equity Tier 1 Risk-Based Capital, Well Capitalized, Minimum Cover [Abstract] Cash and cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Maximum Maximum [Member] Investment securities held to maturity (fair values of $1,066 and $1,065, respectively) Held to maturity, Amortized Cost Investment securities held to maturity Debt Securities, Held-to-Maturity, Excluding Accrued Interest, before Allowance for Credit Loss Exercisable, Weighted Average Exercise Price (in usd per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price Amortization of intangibles (in years) Finite-Lived Intangible Asset, Useful Life Core deposit intangibles beginning balance Core deposit intangibles ending balance Total CDI Finite-Lived Intangible Assets, Net Fair Value Debt Securities, Available-for-Sale, Unrealized Loss Position Available for sale, Amortized Cost, After Ten Years Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 10 Restricted stock Restricted Stock [Member] Tier 1 risk-based capital, To Be Well Capitalized Under Prompt Corrective Action Provisions, amount Banking Regulation, Tier 1 Risk-Based Capital, Well Capitalized, Minimum Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Debt Instrument [Line Items] Debt Instrument [Line Items] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Schedule of Financing Receivable, Recorded Investment, Credit Quality Indicator [Table] Financing Receivable, Credit Quality Indicator [Table] External Credit Rating, Standard & Poor's [Domain] External Credit Rating, Standard & Poor's [Domain] Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Weighted-Average Term Extension (in months) Financing Receivable, Modified, Weighted Average Term Increase from Modification Income before income tax expense Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Entity Shell Company Entity Shell Company Tier 1 leverage capital, Actual ratio (as percent) Banking Regulation, Tier 1 Leverage Capital Ratio, Actual 2009 Recognition and Retention Plan Two Thousand Nine Recognition And Retention Plan [Member] Two Thousand Nine Recognition And Retention Plan [Member] Investment securities: Interest and Dividend Income, Securities, by Taxable Status [Abstract] Revolving Loans Converted to Term Loans Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan Schedule of Long-Term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Proceeds from sale of office properties and equipment Proceeds from Sale of Property, Plant, and Equipment Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Schedule of Cash Flow, Supplemental Disclosures Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] Remaining lease term (in years) Lessee, Operating Lease, Remaining Lease Term Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Total interest expense Total interest expense Interest Expense, Operating Construction and land Construction And Land Portfolio Segment [Member] Construction and land. Related party loan activity [Roll Forward] Related Party Transactions [Roll Forward] Related Party Transactions Held to maturity, Amortized Cost, One Year or Less Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, Year One Mortgage loans sold to Federal Home Loan Mortgage Corporation without recourse Federal Home Loan Mortgage Corporation Certificates and Obligations (FHLMC) [Member] Individually evaluated for impairment, Allowance for loan losses Financing Receivable, Allowance for Credit Loss, Individually Evaluated Loss on sale of securities, net Debt Securities, Available-for-Sale, Gain (Loss) Document Fiscal Period Focus Document Fiscal Period Focus Fair value of the unearned ESOP shares Unearned ESOP Shares Nonrecurring Basis Receivable [Policy Text Block] Goodwill and core deposit intangibles Intangible Assets, Net (Including Goodwill) ESOP related expenses (Percent) Effective Income Tax Rate Reconciliation, Deductions, Employee Stock Ownership Plan Related Expenses, Percent Effective Income Tax Rate Reconciliation, Deductions, Employee Stock Ownership Plan Related Expenses, Percent Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Award Timing Method Award Timing Method [Text Block] Total Financing Receivable, Excluding Accrued Interest, Nonaccrual Furniture and equipment Furniture and Fixtures [Member] Award Type [Axis] Award Type [Axis] Hedging Relationship [Domain] Hedging Relationship [Domain] Parent Company Parent Company [Member] Stock-based Compensation Plans Share-Based Payment Arrangement [Policy Text Block] Trading Symbol Trading Symbol 2029 Lessee, Operating Lease, Liability, to be Paid, Year Four Note payable leverage loan payments year (in years) Debt Instrument Interest Payment Period Debt instrument interest payment period. 2019 Salary Continuation Agreements 2019 Salary Continuation Agreements [Member] 2019 Salary Continuation Agreements Unearned income Deferred Discounts, Finance Charges and Interest Included in Receivables Tax-exempt interest Interest Income, Securities, Operating, Tax Exempt Entity Address, City or Town Entity Address, City or Town Income before income tax expense Income (Loss) from Continuing Operations Before Income Taxes And Equity In Undistributed Earnings Of Subsidiary Income (Loss) from Continuing Operations Before Income Taxes And Equity In Undistributed Earnings Of Subsidiary Class of Financing Receivable [Axis] Class of Financing Receivable [Axis] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Statement of Income Location, Balance [Domain] Statement of Income Location, Balance [Domain] Aggregate amount of certificates of deposit Time Deposits, at or Above FDIC Insurance Limit Salary Continuation Agreements Salary Continuation Agreements [Member] Salary Continuation Agreements Allowance for Credit Losses Credit Loss, Financial Instrument [Policy Text Block] Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Loans pledged through the bank's blanket lien Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged Originated loans: Financial Asset Originated [Member] Entity Emerging Growth Company Entity Emerging Growth Company Common equity tier 1 capital ratio, Actual ratio (as percent) Banking Regulation, Common Equity Tier 1 Risk-Based Capital Ratio, Actual Summary of Debt Securities, Held-to-maturity Debt Securities, Held-to-Maturity [Table Text Block] Options outstanding (in shares) Outstanding, Number of Option, Beginning Balance (in shares) Outstanding, Number of Option, Ending Balance (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number Condensed Parent Company Only Financial Statements Condensed Financial Information of Parent Company Only Disclosure [Text Block] Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Unfunded lending commitments Unfunded Loan Commitment [Member] Fees and charges Revenue from Contract with Customer, Including Assessed Tax Tier 1 risk-based capital, Minimum Capital Required - Basel III Fully Phased-In (as percent) Tier One Risk Based Capital minimum capital required fully phase in ratio Tier 1 risk based capital minimum capital required fully phase in ratio. Total Financing Receivable, Excluding Accrued Interest, Modified, Accumulated Total noninterest income Noninterest income Noninterest Income Common stock, shares outstanding (in shares) Common Stock, Shares, Outstanding Multi-family residential Multi Family Residential Portfolio Segment [Member] Multi family residential. Gain on sale of loans, net Gain on sale of loans, net Gain (Loss) on Sales of Loans, Net Chief Executive Officer Chief Executive Officer [Member] Loans Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Noninterest Expense Noninterest Expense [Abstract] Cash and cash equivalents Cash in bank Cash and Due from Banks Tier 1 risk-based capital, Minimum Capital Required - Basel III Fully Phased-In, Amount Tier One Risk Based Capital Minimum Capital Required Fully Phase In Tier 1 risk based capital minimum capital required fully phase in. Class of Financing Receivable [Domain] Class of Financing Receivable [Domain] Exercise of stock options Stock Issued During Period, Value, Stock Options Exercised Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Summary of Estimated Future Amortization Expense Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Derivative Instruments and Hedging Activities Disclosure [Abstract] Accrued interest payable and other liabilities Accounts Payable and Accrued Liabilities PPP loans Paycheck Protection Program Loans [Member] Paycheck Protection Program Loans Held to maturity, After One Year through Five Years, Fair Value Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five Weighted-Average Interest Rate Reduction Financing Receivable, Modified, Weighted Average Interest Rate Decrease from Modification Number of Shares Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Restatement Determination Date Restatement Determination Date Income tax expense Total income tax expense Income tax benefit Income Tax Expense (Benefit) Debt instrument basis points Debt Instrument, Basis Spread on Variable Rate Certificates of deposit Interest-Bearing Domestic Deposit, Certificates of Deposits Other assets Other Assets Credit Rating, Standard & Poor's [Axis] Credit Rating, Standard & Poor's [Axis] Fair Value, Over 1 Year Debt Securities, Held-To-Maturity, Continuous Unrealized Loss Position, 12 Months Or Longer, Fair Value1 Debt Securities, Held-To-Maturity, Continuous Unrealized Loss Position, 12 Months Or Longer, Fair Value1 Thereafter Time Deposit Maturities, after Year Five Preferred stock, shares issued (in shares) Preferred Stock, Shares Issued Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Designated as Hedging Designated as Hedging Instrument [Member] Deposit liability Deposit Liability, Uninsured Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Hedging Relationship [Axis] Hedging Relationship [Axis] Total office properties and equipment Property, Plant and Equipment, Gross Held to maturity, One Year or Less, Fair Value Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, Year One ESOP Share Allocation [Roll Forward] Employee Stock Ownership Plan (ESOP), Shares in ESOP1 [Roll Forward] Employee Stock Ownership Plan (ESOP), Shares in ESOP1 Number of employees covered Defined Contribution Plan, Number of Employees Contributions made by company, amount Defined Contribution Plan, Employer Discretionary Contribution Amount Shareholders' Equity Stockholders' Equity, Policy [Policy Text Block] Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Proceeds from exercise of stock options Proceeds from Stock Options Exercised Available portion of lines of credit Unused lines of Credit [Member] Federal Income Tax Paid, Federal, after Refund Received All Trading Arrangements All Trading Arrangements [Member] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] Bank-owned life insurance income (Percent) Effective Income Tax Rate Reconciliation, Tax Exempt Income, Percent Servicing assets, weighted average term (in years) Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Weighted Average Life Loss Contingency Disclosure Commitments and Contingencies, Policy [Policy Text Block] Other Effective Income Tax Rate Reconciliation, Other Adjustments, Amount Deferred tax liabilities: Deferred Tax Liabilities, Gross [Abstract] Number of Shares, Beginning Balance (in shares) Number of Shares, Ending Balance (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Unrecognized compensation cost Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount Net cash provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Subordinated debt amortization period (in years) Debt Instrument, Term Proceeds from sales on securities available for sale Proceeds from Sale of Debt Securities, Available-for-Sale Investment securities available for sale, at fair value (amortized cost $414,884 and $443,804, respectively) Available for sale securities: Total available for sale, Fair Value Investment securities available for sale Debt Securities, Available-for-Sale, Excluding Accrued Interest Amount Federal Home Loan Bank, Advance, Maturity, Average Interest Rate [Abstract] Buildings and improvements Building Improvements [Member] Estimated useful lives of the individual assets (in years) Property, Plant and Equipment, Useful Life Preferred stock, par value (in usd per share) Preferred Stock, Par or Stated Value Per Share Net interest income Interest Income (Expense), Operating Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] PEO Total Compensation Amount PEO Total Compensation Amount Tier 1 risk-based capital, Actual amount Banking Regulation, Tier 1 Risk-Based Capital, Actual Long-Term Debt, Type [Axis] Long-Term Debt, Type [Axis] Depreciation Depreciation expense Depreciation Financing Receivable Name [Axis] Financing Receivable Name [Axis] Financing Receivable Name Gross derivative liabilities Derivative Liability, Subject to Master Netting Arrangement, before Offset Equity Components [Axis] Equity Components [Axis] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Origination year - 3 years prior to current fiscal year Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year Deposits Liabilities, Balance Sheet, Reported Amounts [Abstract] Standby letters of credit Standby Letters of Credit [Member] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Number of reportable segments Number of Reportable Segments Benefit Plans Compensation and Employee Benefit Plans [Text Block] HTC Deferred Tax Assets, Historic Tax Credit Deferred Tax Assets, Historic Tax Credit Home Bank N.A. Home Bank NA [Member] Home Bank NA [Member] Commercial properties Commercial Real Estate [Member] Entity Address, State or Province Entity Address, State or Province Substandard Substandard [Member] Total interest income Total interest income Interest and Dividend Income, Operating Financing Receivables, Period Past Due [Domain] Financial Asset, Aging [Domain] Special Mention Special Mention [Member] Servicing asset Servicing Asset Individually evaluated loans Loans, net Loans Receivable, Fair Value Disclosure Revolving Loans Converted to Term Loans Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan, Reversal Adjustment Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan, Reversal Adjustment Number of banking offices for conducting business Number Of Banking Offices For Conducting Business Number of banking offices for conducting business. Individual: Individual [Axis] Decrease (increase) in accrued interest receivable and other assets Increase in accrued interest receivable and other assets Increase Decrease In Interest Receivable And Other Assets (Increase) decrease in interest receivable and other assets. Dividends paid to shareholders Payment of dividends on common stock Payments of Ordinary Dividends, Common Stock Document Annual Report Document Annual Report Portion of retained earnings not treated for deferred federal income tax liability Deferred Tax Liabilities Not Recognized For Portion Of Retained Earnings Deferred tax liabilities not recognized for portion of retained earnings. Balance, beginning of period Balance, end of period Servicing Asset at Amortized Cost 2014 Plan Two Thousand And Fourteen Equity Incentive Plan [Member] Two Thousand And Fourteen Equity Incentive Plan [Member] Other Borrowings Other Borrowings [Member] Other Borrowings [Member] Principal Forgiveness Principal Forgiveness [Member] Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Entity Interactive Data Current Entity Interactive Data Current Current period gross charge-offs Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract] Financing Receivable, Troubled Debt Restructuring [Line Items] Financing Receivable, Modified [Line Items] Increase (decrease) resulting from: Income Tax Reconciliation [Abstract] Income tax reconciliation. Revenue Recognition Revenue from Contract with Customer [Policy Text Block] Interest Income Interest and Dividend Income, Operating [Abstract] Nondeductible share based compensation expense Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-Based Payment Arrangement, Amount Total noninterest expense Noninterest expense Noninterest Expense Net operating loss acquired Deferred Tax Assets, Operating Loss Carryforwards Payment Deferral Payment Deferral [Member] Transfer of Financial Assets Transfers and Servicing of Financial Assets, Policy [Policy Text Block] Deposits Interest Expense, Deposits Property, Plant and Equipment, Type [Axis] Long-Lived Tangible Asset [Axis] Noninterest Income Noninterest Income [Abstract] Money market accounts Interest-Bearing Domestic Deposit, Money Market Total ESOP shares (in shares) Employee Stock Ownership Plan (ESOP), Shares in ESOP Entity Central Index Key Entity Central Index Key PEO Name PEO Name Derivative fee income Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Additional employer matching contribution on employee contributions between 2% and 6% (as percent) Defined Contribution Plan, Additional Employer Matching Contribution, Percent of Match Defined Contribution Plan, Additional Employer Matching Contribution, Percent of Match Summary of Credit Quality Indicators of Loan Portfolio Financing Receivable Credit Quality Indicators [Table Text Block] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Chief Credit Officer Chief Risk Officer [Member] Chief Risk Officer [Member] Noninterest-bearing Noninterest-Bearing Deposit Liabilities Fair value, end of period Servicing Asset at Amortized Cost, Fair Value St. Martin Bancshares, Inc. St Martin Bancshares [Member] St Martin Bancshares. Exercise Price Award Exercise Price Entity Filer Category Entity Filer Category Dividend from subsidiary Dividend Income, Operating U.S. federal statutory income tax rate (Percent) Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent 2028 Finite-Lived Intangible Asset, Expected Amortization, Year Three Reclassification adjustment for losses included in net income Reclassification adjustment for income (loss) Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Recognition of SBA servicing asset Servicing Asset at Amortized Cost, Additions Entity Address, Address Line One Entity Address, Address Line One Loans Held for Sale Financing Receivable, Held-for-Sale [Policy Text Block] Accumulated Other Comprehensive Loss AOCI Attributable to Parent [Member] Investments [Domain] Investments [Domain] Unrealized Losses Debt Securities, Held-To-Maturity, Unrealized Loss Position, Accumulated Loss1 Debt Securities, Held-To-Maturity, Unrealized Loss Position, Accumulated Loss1 Revolving Loans Converted to Term Loans Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan, Writeoff Internal Credit Assessment [Axis] Internal Credit Assessment [Axis] Business Combination, Asset Acquisition, Transaction between Entities under Common Control, and Joint Venture Formation [Abstract] Internal Credit Assessment [Domain] Internal Credit Assessment [Domain] Total Deposits Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposit Liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposit Liabilities Derivatives and Hedging Activities Derivative Instruments and Hedging Activities Disclosure [Text Block] Vested period (in years) Period Of Benefit Under Plan Period of benefit under plan. Fair Value as of Grant Date Award Grant Date Fair Value Unrecorded deferred income tax liability Deferred Tax Liability Not Recognized, Amount of Unrecognized Deferred Tax Liability, Bad Debt Reserve for Tax Purposes of Qualified Lender Earnings Per Share, Diluted, by Common Class, Including Two-Class Method [Table] Earnings Per Share, Diluted, by Common Class, Including Two-Class Method [Table] Origination year - 4 years prior to current fiscal year Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year Compensation and benefits Labor and Related Expense Mortgage servicing rights Deferred Tax Assets Mortgage Servicing Rights Deferred tax assets mortgage servicing rights. Restricted stock / Stock options (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements Granted, Number of Shares (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Summary of Effect of Company's Derivative Instruments on the Consolidated Statements of Income Schedule of Cash Flow Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block] Relationship to Entity [Domain] Title and Position [Domain] Forfeited, Number of Shares (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Related Party Transaction [Line Items] Related Party Transaction [Line Items] Fair Value , Less Than 1 Year Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months Tier 1 risk-based capital, Actual ratio (as percent) Banking Regulation, Tier 1 Risk-Based Capital Ratio, Actual Deposits Deposit Liabilities Disclosures [Text Block] Income from bank-owned life insurance Bank Owned Life Insurance Income Summary of Significant Unobservable Inputs Used in Fair Value Measurement of Level 3 Assets Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Summary of Information Pertaining to Nonaccrual Loans Financing Receivable, Nonaccrual [Table Text Block] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] 2027 Lessee, Operating Lease, Liability, to be Paid, Year Two Condensed Financial Information Disclosure [Abstract] Condensed Financial Information Disclosure [Abstract] Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Outstanding, Weighted-Average Remaining Contractual Term (Years) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Investment Type [Axis] Investment Type [Axis] Material losses anticipated Material Losses Anticipated As Result Of Transactions Material losses anticipated as a result of transactions. Title Trading Arrangement, Individual Title Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Securities held-to-maturity, Fair Value Debt Securities, Held-to-Maturity, Unrealized Loss Position, Fair Value [Abstract] Non-PEO NEO Non-PEO NEO [Member] GS Financial Corporation GS Financial Corp [Member] GS Financial Corp. Derivative liabilities - notional amount Derivative Liability, Notional Amount Land Land [Member] Available for sale, Gross Unrealized Gains Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax Equity Award [Domain] Award Type [Domain] Amount of Loss Recognized in OCI Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax 2026 Lessee, Operating Lease, Liability, to be Paid, Year One Held to maturity, Gross unrealized losses, Over 1 Year Gross unrealized losses, Over 1 Year Debt Securities, Held-To-Maturity, Continuous Unrealized Loss Position, 12 Months Or Longer, Accumulated Loss1 Debt Securities, Held-To-Maturity, Continuous Unrealized Loss Position, 12 Months Or Longer, Accumulated Loss1 Equity Awards Adjustments Equity Awards Adjustments [Member] Foreclosed assets and ORE - Weighted average / Range of discounts (percent) Foreclosed Assets and Other Real Estate, Measurement Input Foreclosed Assets and Other Real Estate, Measurement Input Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Compensation Amount Outstanding Recovery Compensation Amount Total risk-based capital, To Be Well Capitalized Under Prompt Corrective Action Provisions, amount Banking Regulation, Total Risk-Based Capital, Well Capitalized, Minimum Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Fair Value Estimate of Fair Value Measurement [Member] Note payable leverage loan term (in years) Sub-Tranche Term loan Maturity Maturity period of term loan facility under subtranche. MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Available for sale, Amortized Cost, After One Year through Five Years Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year One Through Five Britton & Koontz Capital Corporation Britton Koontz Capital Corporation (Member) Britton Koontz Capital Corporation. Service fees and charges Deposit Account [Member] 2029 Time Deposit Maturities, Year Four Documents Incorporated by Reference Documents Incorporated by Reference [Text Block] Financing Receivable, Recorded Investment, Past Due [Line Items] Financing Receivable, Past Due [Line Items] Available for sale, Amortized Cost, After Five Years through Ten Years Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 Number of investment securities in a continuous loss position for over 12 months Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions Number of salary continuation agreements Salary Continuation Agreements, Number Salary Continuation Agreements, Number Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Held to maturity, Gross unrealized losses, Less Than 1 Year Gross unrealized losses, Less Than 1 Year Debt Securities, Held-To-Maturity, Continuous Unrealized Loss Position, Less Than 12 Months, Accumulated Loss1 Debt Securities, Held-To-Maturity, Continuous Unrealized Loss Position, Less Than 12 Months, Accumulated Loss1 Financial Instruments [Domain] Financial Instruments [Domain] Benefit Plans [Line Items] Benefit Plans [Line Items] Benefit plans. Held to maturity, After Ten Years, Fair Value Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 10 Deferred tax liabilities Deferred Tax Liabilities, Gross Summary of Effect of Cash Flow Hedge Accounting on Accumulated Other Comprehensive (Loss) Income Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) [Table Text Block] Agreement termination value Assets Needed for Immediate Settlement, Aggregate Fair Value Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Other Investments Federal Home Loan Bank Stock [Policy Text Block] Federal home loan bank stock. Other borrowings expense Interest Expense Other Borrowings Interest Expense Other Borrowings Postemployment Benefits [Abstract] Postemployment Benefits [Abstract] Pledging Purpose [Domain] Pledging Purpose [Domain] Schedule Of Summary Of Significant Accounting Policies [Line Items] Schedule Of Summary Of Significant Accounting Policies [Line Items] Schedule of summary of significant accounting policies. Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Banking Regulation, Regulatory Capital Requirement, Compliance [Table] Banking Regulation, Regulatory Capital Requirement, Compliance [Table] Minimum Minimum [Member] Net interest income after provision for loan losses Interest Income (Expense), after Provision for Loan Loss Nonaccrual Financial Asset, Non-Accrual [Member] Financial Asset, Non-Accrual Tier 1 leverage capital, Minimum Capital Required - Basel III Fully Phased-In, Amount Tier one Leverage Capital Minimum Capital Required Fully Phase In Tier 1 leverage capital minimum capital required fully phase in. SBA guaranteed portion of loans sold Servicing Asset at Amortized Cost, Disposals Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Company Selected Measure Name Company Selected Measure Name Fair Value Measurement [Domain] Fair Value Measurement [Domain] Other Borrowings Debt Disclosure [Text Block] Loss on sale of securities, net Gain (Loss) on Sale of Investments Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Held to maturity, Amortized Cost, After Ten Years Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, after Year 10 Undisbursed portion of loans in process Undisbursed Portion of Loans in Process [Member] Undisbursed portion of loans in process. Collateral [Domain] Collateral Held [Domain] 5.75% Fixed-to-Floating Rate Subordinated Notes 5.75% Fixed-to-Floating Rate Subordinated Notes [Member] 5.75% Fixed-to-Floating Rate Subordinated Notes Goodwill Goodwill [Roll Forward] Financing receivable, recorded investment, 90 days past due and still accruing Financing Receivable, 90 Days or More Past Due, Still Accruing Commitments Commitments and Contingencies Disclosure [Text Block] Weighted average common shares outstanding-assuming dilution (in shares) Weighted Average Number of Shares Outstanding, Diluted Operating Segments Segment Reporting, Policy [Policy Text Block] Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Entity Small Business Company Entity Small Business Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Other expenses Other Cost and Expense, Operating State Current State and Local Tax Expense (Benefit) Subordinated Debt Long-Term Debt [Text Block] Document Transition Report Document Transition Report Unallocated common stock held by: Unallocated Common Stock Held By [Abstract] Unallocated common stock held by. Available for sale, After One Year through Five Years, Fair Value Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Underlying Securities Award Underlying Securities Amount Gross gains Debt Securities, Available-for-Sale, Realized Gain Shares allocated, beginning of year (in shares) Allocated shares held by ESOP trust as of year end (in shares) Employee Stock Ownership Plan (ESOP), Number of Allocated Shares Equity Component [Domain] Equity Component [Domain] Document Period End Date Document Period End Date Cash surrender value of BOLI Cash Surrender Value, Fair Value Disclosure Subsequent Events Subsequent Events, Policy [Policy Text Block] Income Taxes Income Tax Disclosure [Text Block] Contract Amount Contractual Obligation Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Net derivative amounts Derivative Asset, Including Not Subject to Master Netting Arrangement, after Offset and Deduction Exercisable, Weighted-Average Remaining Contractual Term (Years) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Total allowance for credit losses Financing Receivable, Allowance for Credit Loss, Including Lending Commitments Financing Receivable, Allowance for Credit Loss, Including Lending Commitments Document Type Document Type Level 3 Fair Value, Inputs, Level 3 [Member] Earnings Per Share Earnings Per Share [Text Block] Name Outstanding Recovery, Individual Name Marketing and advertising Marketing and Advertising Expense Additional paid-in capital Additional Paid in Capital Product and Service [Axis] Product and Service [Axis] Long-term Federal Home Loan Bank advances Long-term FHLB advances Long-Term Federal Home Loan Bank Advances Revolving Loans Financing Receivable, Excluding Accrued Interest, Revolving, Writeoff Variable lease cost Variable Lease, Cost Amortization and accretion of purchase accounting valuations and intangibles Amortization of Acquisition Costs and Intangible Assets Amortization of Acquisition Costs and Intangible Assets Foreclosed assets and ORE Foreclosed Assets and Other Real Estate Owned, Fair Value Disclosure Foreclosed Assets and Other Real Estate Owned, Fair Value Disclosure Real estate loans: Real Estate Loans [Member] Real estate loans. Federal Home Loan Bank, Advances [Line Items] Federal Home Loan Bank, Advances [Line Items] Proceeds, including principal payments, from loans held for sale Proceeds from Sale, Loan, Held-for-Sale Number of salary continuation agreements Number of Salary Continuation Agreements Number of Salary Continuation Agreements Federal Home Loan Bank stock dividends Federal Home Loan Bank Stock Dividends Receivable Federal home loan bank stock dividends receivable. Range [Axis] Statistical Measurement [Axis] Gross charge-offs, origination year - 1 year before current fiscal year Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff Fair Value Measurement Inputs and Valuation Techniques [Line Items] Fair Value Measurement Inputs and Valuation Techniques [Line Items] Deferred compensation Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Compensation Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Period of stated annual benefit (in years) Period Of Benefit After Retirement Under Plan Period of benefit after retirement under plan. Summary of Outstanding Commitments to Originate Loans and to Advance Additional Amounts Summary Of Outstanding Commitments To Originate Loans And To Advance Additional Amounts [Table Text Block] Summary of outstanding commitments to originate loans and to advance additional amounts. Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items] Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items] SBA Loan SBA Loan [Member] SBA Loan Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] NOW accounts Interest-Bearing Domestic Deposit, Negotiable Order of Withdrawal (NOW) Borrowings on Federal Home Loan Bank advances Proceeds from FHLBank Borrowings, Financing Activities Foreclosed assets, net Foreclosed Assets Net Foreclosed assets net. Combination Term Extension and Principal Forgiveness Extended Maturity and Principal Forgiveness [Member] Other comprehensive income, net of taxes Other comprehensive income Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Collectively evaluated for impairment, including unfunded lending commitments, total allowance for credit losses Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment, Including Unfunded Lending Commitments Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment, Including Unfunded Lending Commitments Combination Term Extension and Interest Rate Reduction Extended Maturity and Interest Rate Reduction [Member] Total operating expenses Operating Expenses Loan commitments maturities period (in years) Maximum Maturity Period Of Contingent Liabilities Maximum maturity period of contingent liabilities. Level 1 Fair Value, Inputs, Level 1 [Member] Gain (loss) on sale of assets, net (Gain) loss on sale of assets, net Gain (Loss) on Disposition of Assets Repayments of Federal Home Loan Bank advances Payments of FHLBank Borrowings, Financing Activities 2025 Salary Continuation Agreements 2025 Salary Continuation Agreements [Member] 2025 Salary Continuation Agreements Loss duration (in months) Period Of Continuous Loss Position For Investment Securities Period of continuous loss position for investment securities. (Decrease) increase in accrued interest payable and other liabilities Decrease in accrued expenses and other liabilities Increase (Decrease) in Accrued Liabilities Related Party Transaction [Table] Related Party Transaction [Table] Diluted (in usd per share) Earnings per common share-assuming dilution (in usd per share) Earnings Per Share, Diluted Related party deposits Related Party Deposit Liabilities Available for sale, After Five Years through Ten Years, Fair Value Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 Total Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount Mortgage loans held for sale Financing Receivable, Held-for-Sale State Income Tax Paid, State and Local, after Refund Received Derivative Liability, Statement of Financial Position [Extensible Enumeration] Derivative Liability, Statement of Financial Position [Extensible Enumeration] Investments, Debt and Equity Securities [Abstract] Investments, Debt and Equity Securities [Abstract] Auditor Location Auditor Location Core Deposits Core Deposits [Member] Securities Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items] Risk participation agreements Risk Participation Agreements [Member] Risk Participation Agreements Other loans: Other Loans [Member] Other loans. (Reversal) provision for unfunded commitments Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal), Unfunded Commitments Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal), Unfunded Commitments Term Extension Extended Maturity [Member] Purchase of Company's common stock at cost Stock Repurchased and Retired During Period, Value Long-term FHLB advances Federal Home Loan Bank Borrowings, Fair Value Disclosure Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Axis] Comprehensive Income (Loss) Comprehensive Income, Policy [Policy Text Block] Chief Financial Officer Chief Financial Officer [Member] Less: amount representing interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount BBB/BB/B Standard & Poor's, BBB or BB or B Rating [Member] Standard & Poor's, BBB or BB or B Rating 2026 Time Deposit Maturities, Year One Income taxes paid Income Taxes Paid, Net Parent Company Only Financial Information [Table] Parent Company Only Financial Information [Table] Parent Company Only Financial Information [Table] Commitments to originate loans Commitments to Extend Credit [Member] Corporate bonds Corporate Bond Securities [Member] 2027 Finite-Lived Intangible Asset, Expected Amortization, Year Two Granted, Weighted-Average Exercise Price (in usd per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Office Properties and Equipment Property, Plant and Equipment Disclosure [Text Block] Total future minimum lease payments Lessee, Operating Lease, Liability, to be Paid Summary of Employee Stock Ownership Plan Employee Stock Ownership Plan (ESOP) Disclosures [Table Text Block] Period for which executive's beneficiary will receive upon death Period Of Monthly Installment Payments On Death During Active Service Period of monthly installment payments on death during active service. Summary of Company's and the Bank's Actual Capital Amounts and Ratios Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block] Loans, net of unearned income Total loans Total Loans Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss Unrealized loss on securities available for sale Deferred Tax Asset, Debt Securities, Trading, Unrealized Loss Summary of Company's Investment Securities With Unrealized Losses, Aggregated by Type and Length Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block] Expiration Date Trading Arrangement Expiration Date Change in related parties, net Loans and Leases Receivable, Related Parties, Change In related Parties, Net Loans and Leases Receivable, Related Parties, Change In related Parties, Net 2030 Finite-Lived Intangible Asset, Expected Amortization, Year Five Allowance for credit losses on held-to-maturity securities Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Excluding Accrued Interest Office properties and equipment, net Total office properties and equipment, net Property, Plant and Equipment, Net RRP shares released for allocation Recognition And Retention Plan Shares Released For Allocation Recognition and retention plan shares released for allocation. Numerator: Net Income (Loss) Attributable to Parent [Abstract] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Entity Current Reporting Status Entity Current Reporting Status Receivables [Abstract] Receivables [Abstract] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] Collateral [Axis] Collateral Held [Axis] Consolidated Entities [Domain] Consolidated Entities [Domain] Available for sale, Amortized Cost, One Year or Less Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, Year One Federal tax based on statutory rate Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount HTC Historic Tax Credit, Income Tax Expense (Benefit) Historic Tax Credit, Income Tax Expense (Benefit) 2026 Federal Home Loan Bank, Advance, Maturity, Fixed Rate, Year One Financial Instrument [Axis] Financial Instrument [Axis] Deferred tax assets: Deferred Tax Assets, Gross [Abstract] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Executive Category: Executive Category [Axis] Available for sale, Gross Unrealized Losses, Over 1 Year Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Loans Financing Receivable [Policy Text Block] Compensation cost related to ESOP Employee Stock Ownership Plan (ESOP), Compensation Expense State taxes, net of federal income tax effect (Percent) Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent Total, end of period SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate NMTC Effective Income Tax Rate Reconciliation, Tax Credit, Investment, Amount Total interest expense Interest Expense, Operating and Nonoperating Current Fiscal Year End Date Current Fiscal Year End Date Available for sale, Gross Unrealized Losses, Less Than 1 Year Gross unrealized losses, Less Than 1 Year Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Total deposits Deposits Summary of Loans, Net of Unearned Income Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Weighted-Average Grant Date Fair Value Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Number of shares available for grant (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant Professional services Professional Fees Derivative liabilities Derivative Liability Other expenses Other Noninterest Expense Granted, Weighted-Average Grant Date Fair Value (in usd per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Loan Restructuring Modification [Axis] Loan Restructuring Modification [Axis] Pass Pass [Member] Interest rate contracts Interest Rate Contract [Member] Payment Deferral (dollars in thousands) Financing Receivable, Excluding Accrued Interest, Modified, Increase (Decrease) from Modification Unrealized Losses Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss Summary of Assets and Liabilities Measured on Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Number of options and common stock not included in computing diluted earnings per share (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Denominator: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Collateral Pledged Collateral Pledged [Member] Summary of Past Due Loans Financing Receivable, Past Due [Table Text Block] Short-term Federal Home Loan Bank advances Short-term FHLB advances Federal Home Loan Bank, Advance, Maturity, Year One Interest-bearing Interest-Bearing Deposit Liabilities Other Commitments [Table] Other Commitments [Table] Net cash (used in) provided by financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Regulatory fees Regulatory Fees Regulatory fees. Weighted-Average Grant Date Fair Value Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Measure: Measure [Axis] Provision (reversal) for loan losses Financing Receivable, Credit Loss, Expense (Reversal) Thereafter Finite-Lived Intangible Asset, Expected Amortization, after Year Five Property, Plant and Equipment, Type [Domain] Long-Lived Tangible Asset [Domain] Consumer Consumer Portfolio Segment [Member] Number of businesses acquired Business Combination, Number of Businesses Acquired Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Amortization of subordinated debt issuance cost Amortization of Debt Issuance Costs Entity Tax Identification Number Entity Tax Identification Number Average cost of shares in open market required to fund the 2009 plan (in usd per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Per Share Weighted Average Price of Shares Purchased Tax credits (Percent) Effective Income Tax Rate Reconciliation, Tax Credit, Percent Exercised, Weighted-Average Grant Date Fair Value (in usd per share) Share Based Compensation Arrangement By Share Based Payment Award Options Exercises Weighted Average Grant Date Fair Value Share based compensation arrangement by share based payment award options exercises weighted average grant date fair value. Gross charge-offs, origination year - 3 year before current fiscal year Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff Outstanding, Weighted Average Exercise Price, Beginning Balance (in usd per share) Outstanding, Weighted Average Exercise Price, Ending Balance (in usd per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price Payment period (in years) Period For Payment For Deferred Compensation And Salary Continuation Agreement Period For Payment For Deferred Compensation And Salary Continuation Agreement Common stock, shares issued (in shares) Common Stock, Shares, Issued Period for appraises of property (in months) Period For Appraises Of Property Period for appraises of property. Derivative Asset, Statement of Financial Position [Extensible Enumeration] Derivative Asset, Statement of Financial Position [Extensible Enumeration] Weighted average remaining lease term (years) Operating Lease, Weighted Average Remaining Lease Term Goodwill and Intangibles Goodwill and Intangible Assets Disclosure [Text Block] Current: Current Federal, State and Local, Tax Expense (Benefit) [Abstract] U.S. agency mortgage-backed Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member] Entity Public Float Entity Public Float Trading Arrangement: Trading Arrangement [Axis] Total Shareholder Return Amount Total Shareholder Return Amount Unrealized losses on cash flow hedges Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, before Tax, Parent Average volume of FHLB balances Federal Home Loan Bank, Short-Term Advances, Activity For Year, Average Balance Of Agreements Outstanding Federal Home Loan Bank, Short-Term Advances, Activity For Year, Average Balance Of Agreements Outstanding Security Exchange Name Security Exchange Name Cash Surrender Value of Bank-Owned Life Insurance Liability for Future Policy Benefit [Policy Text Block] Federal Home Loan Bank, Advances [Table] Federal Home Loan Bank, Advances [Table] Pledging Purpose [Axis] Pledging Purpose [Axis] Purchase of Company's common shares at cost (in shares) Stock Repurchased During Period, Shares Operating expenses Operating Expenses [Abstract] Statement [Line Items] Statement [Line Items] Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Fair Value Measurement Inputs and Valuation Techniques [Table] Fair Value Measurement Inputs and Valuation Techniques [Table] Common Stock Common Stock [Member] Released, Number of Shares (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Net change in cash and cash equivalents Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Employee Stock Ownership Plan (ESOP), Shares in ESOP [Abstract] Employee Stock Ownership Plan (ESOP), Shares in ESOP [Abstract] Range [Domain] Statistical Measurement [Domain] Thereafter Lessee, Operating Lease, Liability, to be Paid, after Year Five Summary of Condensed Balance Sheets Condensed Balance Sheet [Table Text Block] Available for sale, amortized cost Available for sale, Amortized Cost Debt Securities, Available-for-Sale, Amortized Cost, Excluding Accrued Interest, before Allowance for Credit Loss Securities pledged to secure public deposits Debt Securities, Available-for-Sale, Restricted Tax Jurisdiction of Domicile [Extensible Enumeration] Tax Jurisdiction of Domicile [Extensible Enumeration] Interest rate swaps Interest Rate Swap [Member] Cash surrender value of bank-owned life insurance Bank Owned Life Insurance Losses on equity investments Income (Loss) from Equity Method Investments Without Related Allowance Financing Receivable, Excluding Accrued Interest, Nonaccrual, No Allowance Common equity tier 1 capital ratio, Minimum Capital Required - Basel III Fully Phased-In, Amount Common equity Tier One capital Minimum Capital Required Fully Phase In Common equity tier 1 capital minimum capital required fully phase in. Retirement Plan Name [Axis] Retirement Plan Name [Axis] Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Basic (in usd per share) Earnings per common share (in usd per share) Earnings Per Share, Basic Financial Liabilities Liabilities, Fair Value Disclosure [Abstract] FHLB stock dividends Deferred Tax Liabilities Federal Home Loan Bank Stock Dividends Deferred Tax Liabilities Federal Home Loan Bank Stock Dividends Deferred tax assets Deferred Tax Assets, Gross Servicing assets, prepayment rate (as percent) Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Prepayment Speed Deferred: Deferred Federal, State and Local, Tax Expense (Benefit) [Abstract] 2030 Time Deposit Maturities, Year Five 2014 Salary Continuation Agreements 2014 Salary Continuation Agreements [Member] 2014 Salary Continuation Agreements Summary of Notional Amounts and Fair Value of Derivative Liabilities Schedule of Derivative Liabilities at Fair Value [Table Text Block] Deposits Deposits, Fair Value Disclosure Held to maturity, Gross Unrealized Gains Debt Securities, Held-to-Maturity, Accumulated Unrecognized Gain Measurement Input Type [Domain] Measurement Input Type [Domain] Changes in the cash surrender value of bank owned life insurance Effective Income Tax Rate Reconciliation, Changes in Cash Surrender Value of Bank Owned Life Insurance, Amount Effective Income Tax Rate Reconciliation, Changes in Cash Surrender Value of Bank Owned Life Insurance, Amount Collateralized mortgage obligations Collateralized Mortgage Obligations [Member] Summary of Financial Assets Measured at Fair Value on Nonrecurring Basis Fair Value Measurements, Nonrecurring [Table Text Block] Loans transferred to ORE, net of charge offs Loans Transferred To Other Real Estate, Net Of Charge Offs Loans Transferred To Other Real Estate, Net Of Charge Offs Summary of Allowance for Loan Losses and Recorded Investment in Loans Schedule Of Allowance For Loan Losses And Recorded Investment In Loans [Table Text Block] Schedule of allowance for loan losses and recorded investment in loans. Charge-offs Total Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Taxable interest Interest Income, Securities, Operating, Taxable Accounts and Financing Receivables [Table] Accounts and Financing Receivables [Table] Securities held for trading purposes Debt Securities, Trading, and Equity Securities, FV-NI Derivative Instruments, Gain (Loss) [Line Items] Derivative Instruments, Gain (Loss) [Line Items] Compensation and benefits expense Share-Based Payment Arrangement, Expense Hedging Designation [Domain] Hedging Designation [Domain] Schedule Of Other Borrowings [Table] Schedule Of Other Borrowings [Table] Schedule Of Other Borrowings [Table] Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] Forfeited, Number of Options (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period Total Liabilities and Shareholders’ Equity Liabilities and Equity Derivative Instruments, Gain (Loss) [Table] Derivative Instruments, Gain (Loss) [Table] Summary of Activity Related to Servicing Assets Servicing Asset at Amortized Cost [Table Text Block] Long-term Federal Home Loan Bank advances Interest Expense, Federal Home Loan Bank and Federal Reserve Bank Advances, Long-Term Shares allocated during the year (in shares) Stock Issued During Period, Shares, Employee Stock Ownership Plan Bank card fees Credit Card [Member] Other Deferred Tax Assets, Other Accounting Policies [Abstract] Accounting Policies [Abstract] New loans Loans and Leases Receivable, Related Parties, Additions Summary of Maturity of Remaining Lease Liabilities Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block] Unallocated Common Stock Held by RRP Unallocated Common Stock Held By RRP [Member] Unallocated common stock held by RRP. Total Loans Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Financing Receivables Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Financing Receivables Origination year - current fiscal year Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year Parent Company Only Financial Information [Line Items] Parent Company Only Financial Information [Line Items] Parent Company Only Financial Information [Line Items] Pay vs Performance Disclosure [Line Items] Tier 1 leverage capital, To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio (as percent) Banking Regulation, Tier 1 Leverage Capital Ratio, Well Capitalized, Minimum Discount on purchased loans Deferred Tax Assets Discount On Purchased Loans Deferred tax assets discount on purchased loans. U.S. government agency US Government Agencies Debt Securities [Member] Present value of net future minimum lease payments Operating Lease, Liability Greater Than 90 Days Past Due 90+ Days Past Due and Accruing Financial Asset, Equal to or Greater than 90 Days Past Due [Member] Threshold for significant investments Financing Receivable, Significant Loan Threshold Financing Receivable, Significant Loan Threshold Liabilities Liabilities [Abstract] Acquisition Activity Business Combination [Text Block] Accrued liability for interest or penalty payments Income Tax Examination, Penalties and Interest Accrued Regulatory Matters Regulatory Capital Requirements under Banking Regulations [Text Block] Origination year - 2 years prior to current fiscal year Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Company Selected Measure Amount Company Selected Measure Amount 2028 Lessee, Operating Lease, Liability, to be Paid, Year Three Gross charge-offs, origination year - more than 4 years prior to current fiscal year Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year, Writeoff American Bank American Bank [Member] American bank. Tier 1 risk-based capital, To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio (as percent) Banking Regulation, Tier 1 Risk-Based Capital Ratio, Well Capitalized, Minimum Comprehensive Income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Measurement Input Type [Axis] Measurement Input Type [Axis] Name Measure Name Available for sale, One Year or Less, Fair Value Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, Year One Increase in deposits, net Increase (Decrease) in Deposits Proceeds from maturities, prepayments and calls on securities available for sale Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-Sale CDI Finite-Lived Intangible Assets [Roll Forward] Legal Entity [Axis] Legal Entity [Axis] Total Assets Assets Summary of Condensed Statements of Cash Flows Condensed Cash Flow Statement [Table Text Block] Provision for loan losses Deferred Tax Asset, Tax Deferred Expense, Reserve and Accrual, Financing Receivable, Allowance for Credit Loss 2026 Finite-Lived Intangible Asset, Expected Amortization, Year One Audit Information [Abstract] Audit Information Released, Weighted-Average Grant Date Fair Value (in usd per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Financing Receivable, Recorded Investment [Line Items] Financing Receivable, Credit Quality Indicator [Line Items] Management Management [Member] Income Taxes Income Tax, Policy [Policy Text Block] Financing Receivable, Allowance for Credit Loss [Roll Forward] Financing Receivable, Allowance for Credit Loss [Roll Forward] Cash flows from operating activities, net of effects of acquisitions: Cash flows from operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Total risk-based capital, Minimum Capital Required - Basel III Fully Phased-In (as percent) Risk Based Capital minimum capital required fully phased in ratio Risk based capital minimum capital required fully phased in ratio. Weighted average useful life (in years) Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life Age after which employees will be entitled to a stated annual benefit Age After Which Employee Will Be Entitled To Stated Annual Benefit Age after which employees will be entitled to a stated annual benefit. Note payable Notes Payable, Noncurrent Assets Financial Assets Assets, Fair Value Disclosure [Abstract] 2027 Time Deposit Maturities, Year Two 2029 Finite-Lived Intangible Asset, Expected Amortization, Year Four Investment securities held to maturity, fair value Investment securities held to maturity Total held to maturity, Fair Value Debt Securities, Held-to-Maturity, Fair Value Other investments Other Investments Cash dividends declared per common share (in usd per share) Cash dividends declared, per share (in usd per share) Common Stock, Dividends, Per Share, Declared Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Recognition of new operating leases Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Net lease cost: Lease, Cost [Abstract] Debt Securities, Available-for-sale [Line Items] Debt Securities, Available-for-Sale [Line Items] Total Assets Business Combination, Recognized Asset Acquired, Asset Level 2 Fair Value, Inputs, Level 2 [Member] Held to maturity, After Five Years through Ten Years, Fair Value Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 Document Financial Statement Error Correction Flag Document Financial Statement Error Correction [Flag] State tax based on statutory rate Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Business Combination [Domain] Business Combination [Domain] Summary of Income Tax (Benefit) Expense Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Summary of Information Regarding Company's Investment Securities Classified as Available for Sale and Held to Maturity Schedule Of Available For Sale Securities And Held To Maturity [Table Text Block] Schedule of available for sale securities and held to maturity. Loans individually evaluated - Weighted average / Range of discounts (percent) Impaired Loans, Measurement Input Impaired Loans, Measurement Input Plan Name [Axis] Plan Name [Axis] Office Properties and Equipment Property, Plant and Equipment, Policy [Policy Text Block] PEO PEO [Member] Tier 1 leverage capital, Actual amount Banking Regulation, Tier 1 Leverage Capital, Actual Summary of Amortized Cost and Estimated Fair Value by Maturity of Company's Investment Securities Investments Classified by Contractual Maturity Date [Table Text Block] Tier 1 leverage capital, Minimum Capital Required - Basel III Fully Phased-In (as percent) Tier One leverage capital minimum capital required fully phased in ratio Tier 1 leverage capital minimum capital required fully phased in ratio. Noncash investing and financing activities: Noncash Investing and Financing Items [Abstract] Intangible assets Deferred Tax Liabilities, Intangible Assets Related party loans exceeding specified percentage of shareholders equity (as percent) Related Party Loans Exceeding Specified Percentage Of Shareholders Equity Related party loans exceeding specified percentage of shareholders equity. PCD Loans Financial Asset Acquired with Credit Deterioration [Member] Common equity tier 1 capital ratio, actual amount Banking Regulation, Common Equity Tier 1 Risk-Based Capital, Actual Accumulated depreciation Deferred Tax Liabilities, Property, Plant and Equipment Total certificates of deposit Time Deposits Retained Earnings Retained Earnings [Member] Common stock issued under incentive plans, net of shares surrendered in payment, including tax benefit Shares Issued, Value, Share-Based Payment Arrangement, After Forfeiture, Including Tax Shares Issued, Value, Share-Based Payment Arrangement, After Forfeiture, Including Tax Summary of Consolidated Quarterly Results of Operations Quarterly Financial Information [Table Text Block] Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Share-Based Payment Arrangement [Abstract] Cash and cash equivalents at beginning of year Cash and cash equivalents at end of year Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Income Statement [Abstract] Income Statement [Abstract] Derivative assets Derivative Asset Fair Value, Over 1 Year Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer Nonrecurring Fair Value, Nonrecurring [Member] Summary of Maturities of Certificates of Deposit Time Deposit Maturities [Table Text Block] Financing Receivable, Troubled Debt Restructuring [Table] Financing Receivable, Modified [Table] Summary of Portfolio Segments by Risk Characteristics Schedule of Risk Characteristics by Portfolio Segment [Table Text Block] Schedule of Portfolio Segments by Risk Characteristics Other income Noninterest Income, Other (Reversal) provision for credit losses on unfunded commitments Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal) Product and Service [Domain] Product and Service [Domain] Contribution to salary agreement Amounts Paid Under Deferred Compensation And Salary Continuation Agreements Amounts Paid Under Deferred Compensation And Salary Continuation Agreements Securities available-for-sale, Fair Value Debt Securities, Available-for-Sale [Abstract] Purchase of Federal Home Loan Bank stock Payments to Acquire Federal Home Loan Bank Stock Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Forms, printing and supplies Supplies and Postage Expense Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Business Combination [Table] Business Combination [Table] Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Bank-owned life insurance income Effect of tax-exempt income Effective Income Tax Rate Reconciliation, Tax Exempt Income, Amount Revolving Loans Financing Receivable, Excluding Accrued Interest, Revolving Statewide Bank Statewide Bank [Member] Statewide bank. 2015 Salary Continuation Agreements 2015 Salary Continuation Agreements [Member] 2015 Salary Continuation Agreements City Area Code City Area Code Summary of Activity in Allowance for Loan Losses Financing Receivable, Allowance for Credit Loss [Table Text Block] Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Salary Continuation Agreements Salary Continuation Agreements [Policy Text Block] Salary continuation agreements. Outstanding, Weighted-Average Grant Date Fair Value, Beginning Balance (in usd per share) Outstanding, Weighted-Average Grant Date Fair Value, Ending Balance (in usd per share) Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Grant Date Fair Value Share based compensation arrangement by share based payment award options outstanding weighted average grant date fair value. ESOP related expenses Income Tax Rate Reconciliation, Deductions, Employee Stock Ownership Plan Related Expenses Income Tax Rate Reconciliation, Deductions, Employee Stock Ownership Plan Related Expenses Debt Securities, Trading, and Equity Securities, FV-NI [Table] Debt Securities, Trading, and Equity Securities, FV-NI [Table] Cash flows from investing activities, net of effects of acquisitions: Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Accrued interest receivable Interest Receivable Operating Lease, Liability, Statement of Financial Position [Extensible List] Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration] Employer matching contribution as percentage of employee contributions made on first 2% of employee's pay (as percent) Defined Contribution Plan, Employer Matching Contribution, Percent of Match Related Party Transactions [Abstract] Related Party Transactions [Abstract] Percent of period vested (as percent) Defined Contribution Plan, Employers Matching Contribution, Annual Vesting Percentage Net lease cost Lease, Cost Other liabilities Other Liabilities Cash Flow Hedging Cash Flow Hedging [Member] Goodwill Goodwill beginning balance Goodwill ending balance Goodwill Summary of Net Lease Cost and Selected Other Information Lease, Cost [Table Text Block] Federal Deferred Federal Income Tax Expense (Benefit) Auditor Name Auditor Name Stock compensation related benefits Effective Income Tax Rate Reconciliation, Tax Expense (Benefit), Share-Based Payment Arrangement, Amount Accounts receivable, Inventory and Equipment Equipment [Member] Decrease in interest-bearing deposits in banks Proceeds from (Payments for) in Interest-Bearing Deposits in Banks Supplementary cash flow information: Supplemental Cash Flow Information [Abstract] Other Performance Measure, Amount Other Performance Measure, Amount Weighted-Average Exercise Price Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Fair Value Measurements and Disclosures Fair Value Measurement, Policy [Policy Text Block] Collectively evaluated for impairment, including unfunded lending commitments, total allowance for credit losses Financing Receivable, Allowance for Credit Loss, Collectively Evaluated Related Party [Domain] Related and Nonrelated Parties [Domain] Foreclosed real estate assets Repossessed Assets Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract] Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract] Commercial and residential properties Real Estate [Member] Derivative Instrument [Axis] Derivative Instrument [Axis] Reserve requirements Cash Reserve Deposit Required and Made Commercial real estate Commercial Real Estate Portfolio Segment [Member] Net discount on loans Financing Receivable, Unamortized Loan Cost (Fee) and Purchase Premium (Discount) Entity [Domain] Entity [Domain] Credit Loss Status [Axis] Credit Loss Status [Axis] Investment in subsidiary Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures Net cash used in investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Interest paid on deposits and borrowed funds Interest Paid, Excluding Capitalized Interest, Operating Activity Document Fiscal Year Focus Document Fiscal Year Focus Right-of-use asset Operating Lease, Right-of-Use Asset Effective tax rate (as percent) Effective Income Tax Rate Reconciliation, Percent Costs to sell Measurement Input, Cost to Sell [Member] Operating lease cost Operating Lease, Cost Selected other operating lease information Operating Lease Information [Abstract] Operating Lease Information Carrying Amount Reported Value Measurement [Member] Plan Name [Domain] Plan Name [Domain] Unrecognized compensation cost, period for recognition (in years) Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Franchise and shares tax Taxes, Miscellaneous Exercised, Number of Options (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period Intangible Assets Goodwill and Intangible Assets, Policy [Policy Text Block] Derivatives and Hedging Activities Derivatives, Policy [Policy Text Block] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Not Designated as Hedging Instrument Not Designated as Hedging Instrument [Member] Federal Current Federal Tax Expense (Benefit) Other Commitments [Line Items] Other Commitments [Line Items] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Data processing and communication Information Technology and Data Processing Individually evaluated for impairment, including unfunded lending commitments, total allowance for credit losses Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment, Including Unfunded Lending Commitments Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment, Including Unfunded Lending Commitments Securities available-for-sale, Unrealized Losses Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss [Abstract] Doubtful Doubtful [Member] 401 (k) and Profit Sharing Plan Four Zero One KAnd Profit Sharing Plan [Member] Four zero one k and profit sharing plan. Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Summary of Long-term Advances Federal Home Loan Bank, Advances [Table Text Block] Weighted Average Weighted Average [Member] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Deferred lender fees Financing Receivable, Unamortized Loan Cost (Fee) Operating Leases Lessee, Leases [Policy Text Block] Amortization of acquisition intangible Amortization of intangibles Amortization of Intangible Assets Mortgage loans held for sale Loan, Mortgage, Held-for-Sale, Fair Value Disclosure Loan 1 Financing Receivable, One [Member] Financing Receivable, One Arrangement Duration Trading Arrangement Duration Benefit Plans [Table] Benefit Plans [Table] Benefit Plans [Table] One- to four-family first mortgage One To Four Family First Mortgage Portfolio Segment [Member] One to four family first mortgage. ESOP shares released for allocation Amortization of ESOP Award Local Phone Number Local Phone Number Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Fair Value, Less Than 1 Year Debt Securities, Held-To-Maturity, Continuous Unrealized Loss Position, Less Than 12 Months, Fair Value1 Debt Securities, Held-To-Maturity, Continuous Unrealized Loss Position, Less Than 12 Months, Fair Value1 Total Financing Receivable, Accrued Interest, Writeoff Accrued interest receivable and other assets Interest Receivable and Other Assets Stock-based Payment Arrangements Share-Based Payment Arrangement [Text Block] Assets Assets [Abstract] Credit Facility [Axis] Credit Facility [Axis] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Balance, beginning of year Balance, end of year Loans and Leases Receivable, Related Parties Debt Instrument [Axis] Debt Instrument [Axis] Forfeited, Weighted-Average Grant Date Fair Value (in usd per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Fair Value Measurements and Disclosures Fair Value Disclosures [Text Block] Business Combination [Line Items] Business Combination [Line Items] Credit Facility [Domain] Credit Facility [Domain] Shareholders’ Equity Equity, Attributable to Parent [Abstract] Former executive Executive Officer [Member] Repayments, net Loans and Leases Receivable, Related Parties, Proceeds Summary of Loans Modification Financing Receivable, Modified [Table Text Block] Proceeds from redemption of Federal Home Loan Bank stock Proceeds from Sale of Federal Home Loan Bank Stock Note payable interest rate (as percent) Fixed-to-floating rate (as percent) Debt Instrument, Interest Rate, Stated Percentage 30-59 Days Past Due Financial Asset, 30 to 59 Days Past Due [Member] Entity Voluntary Filers Entity Voluntary Filers Fair Value Debt Securities, Held-To-Maturity, Unrealized Loss Position, Fair Value1 Debt Securities, Held-To-Maturity, Unrealized Loss Position, Fair Value1 Accrued interest receivable Debt Securities, Available-For-Sale Securities And Held-To-Maturity Securities, Accrued Interest, After Allowance For Credit Loss Debt Securities, Available-For-Sale Securities And Held-To-Maturity Securities, Accrued Interest, After Allowance For Credit Loss Held to maturity, Amortized Cost, After Five Years through Ten Years Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, after Year 5 through 10 Gross derivative assets Derivative Asset, Subject to Master Netting Arrangement, before Offset Common equity tier 1 capital ratio, Minimum Capital Required - Basel III Fully Phased-In (as percent) Common equity Tier one capital minimum capital required fully phased in ratio Common equity tier 1 capital minimum capital required fully phased in ratio Property, Plant and Equipment [Abstract] Property, Plant and Equipment [Abstract] Entity Registrant Name Entity Registrant Name Estimate of additional amounts to be reclassified as additional interest income Cash Flow Hedge Gain (Loss) to be Reclassified within 12 Months Friendswood Capital Corporation Friendswood Capital Corporation (“Friendswood”) [Member] Friendswood Capital Corporation (“Friendswood”) Retirement Plan Name [Domain] Retirement Plan Name [Domain] Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Total risk-based capital, To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio (as percent) Banking Regulation, Total Risk-Based Capital Ratio, Well Capitalized, Minimum Municipal bonds Municipal Bonds [Member] Loan Servicing Loan Servicing [Text Block] Loan Servicing [Text Block] Undistributed earnings in subsidiary Undistributed earnings in subsidiary Dividends Received In Excess Of Earnings Of Subsidiary Undistributed Earnings Dividends received in excess of earnings of subsidiary undistributed earnings. Total Assets, Fair Value Disclosure Number of debt securities with unrealized losses Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions Deposits: Deposits [Abstract] Total Past Due Financial Asset, Past Due [Member] Number of operating segments Number of Operating Segments COO, CBO And CAO COO, CBO And CAO [Member] COO, CBO And CAO Net amortization of premium on investments Accretion (Amortization) of Discounts and Premiums, Investments Related Party [Axis] Related and Nonrelated Parties [Axis] Granted, Weighted-Average Grant Date Fair Value (in usd per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Summary of Changes in Carrying Amount of Goodwill and Core Deposit Intangible Schedule of Finite-Lived Intangible Assets [Table Text Block] Restatement Determination Date: Restatement Determination Date [Axis] Repayments of other borrowings Repayments of Other Debt Originations of loans held for sale Payment for Origination and Purchase, Loan, Held-for-Sale Name Trading Arrangement, Individual Name Number of Options Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Nonvested, Number of Shares [Roll Forward] Aggregate principal amount Debt Instrument, Face Amount Public Deposits Deposits [Member] Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Name Awards Close in Time to MNPI Disclosures, Individual Name New Markets Tax Credits ("NMTC") New Markets Tax Credit, Income Tax Expense (Benefit) New Markets Tax Credit, Income Tax Expense (Benefit) Weighted-Average Grant Date Fair Value, Beginning Balance (in usd per share) Weighted-Average Grant Date Fair Value, Ending Balance (in usd per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Collectively evaluated for impairment, Recorded investment in loans Financing Receivable, Collectively Evaluated for Credit Loss Held to maturity, Amortized Cost, After One Year through Five Years Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, after Year One through Five Accumulated unrealized gains, net of taxes, on derivative instruments AOCI, Cash Flow Hedge, Cumulative Gain (Loss), after Tax Foregoing loan servicing arrangements Escrow Deposit Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Eligibility age to participate in ESOP Eligibility Age To Participate In ESOP Eligibility age to participate in ESOP. ICFR Auditor Attestation Flag ICFR Auditor Attestation Flag Percent of employee's pay to be matched by employer (as percent) Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay Share-based compensation cost APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Tax effect for unrealized gains on investment securities OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, Tax Summary of Condensed Statements of Operations Condensed Income Statement [Table Text Block] Other Borrowings [Line Items] Other Borrowings [Line Items] Other borrowings [Line Items]. Auditor Firm ID Auditor Firm ID Credit Loss Status [Domain] Credit Loss Status [Domain] Statement of Income Location, Balance [Axis] Statement of Income Location, Balance [Axis] Financing Receivable Name [Domain] Financing Receivable Name [Domain] Financing Receivable Name Investment Securities Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] NMTC Deferred Tax Liabilities, Investments Employee Stock Ownership Plan (ESOP) Employee Stock Ownership Plan (ESOP), Deferred Shares Forfeited, Weighted-Average Grant Date Fair Value (in usd per share) Share Based Compensation Arrangement By Share Based Payment Award Awards Forfeited In Period Weighted Average Grant Date Fair Value Share-based compensation arrangement by share-based payment award awards forfeited in period weighted average grant date fair value. Assets Derivative Asset [Abstract] Interest Expense Interest Expense, Operating and Nonoperating [Abstract] Less accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Earnings Per Share Earnings Per Share, Policy [Policy Text Block] Salary continuation plan Deferred Tax Assets Retirement Plans And Salary Continuation Deferred tax assets retirement plans and salary continuation. Netting adjustments Derivative Liability, Subject to Master Netting Arrangement, Asset Offset Purchases of securities available for sale Payments to Acquire Debt Securities, Available-for-Sale Operating income Operating Income (Loss) [Abstract] Preferred stock, $0.01 par value - 10,000,000 shares authorized; none issued Preferred Stock, Value, Issued Subordinated debt, net of unamortized issuance cost Subordinated debt, net of issuance cost Subordinated Debt Origination year - 1 year before current fiscal year Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year Servicing Asset at Amortized Cost, Balance [Roll Forward] Servicing Asset at Amortized Cost, Balance [Roll Forward] Subordinated Debt Subordinated Debt [Member] Financing Receivables, Period Past Due [Axis] Financial Asset, Aging [Axis] All Executive Categories All Executive Categories [Member] Summary of Deferred Tax Asset Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Advance from Federal Home Loan Bank [Abstract] Common stock, $0.01 par value - 40,000,000 shares authorized; 7,831,342 and 8,091,522 shares issued and outstanding, respectively Common Stock, Value, Issued Loans, including fees Interest and Fee Income, Loans and Leases Title and Position [Axis] Title and Position [Axis] Income before equity in undistributed earnings of subsidiary Income Loss From Continuing Operations After Provision For Income Taxes And Before Equity Method Investments Income loss from continuing operations after provision for income taxes and before equity method investments. Gross charge-offs, origination year - current fiscal year Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year, Writeoff Core Deposit Intangible Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Finite-Lived Business Combination [Axis] Business Combination [Axis] Interest income Interest Income [Member] Mortgage loans in process of foreclosure Mortgage Loans in Process of Foreclosure, Amount Net deferred tax asset Deferred Tax Assets, Net Percentage of amortized investment securities portfolio (as percent) Percentage Of Amortized Investment Securities Portfolio Percentage of amortized investment securities portfolio. PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Available for sale, After Ten Years, Fair Value Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 10 Long-term FHLB Advances Federal Home Loan Bank Advances, Disclosure [Text Block] 60-89 Days Past Due Financial Asset, 60 to 89 Days Past Due [Member] Loans individually evaluated for impairment Impaired Loans Fair Value Disclosure Impaired Loans Fair Value Disclosure Hedging Designation [Axis] Hedging Designation [Axis] Other investments and deposits Other Interest and Dividend Income Loan servicing arrangements Loan Servicing [Member] Loan servicing. Louisiana Bancorp, Inc. Louisiana Bancorp Inc [Member] Louisiana Bancorp Inc [Member] Net derivative amounts Derivative Liability, Including Not Subject to Master Netting Arrangement, after Offset and Deduction Amount of Gain Reclassified from AOCI into Income Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax Derivative Contract [Domain] Derivative Contract [Domain] Unallocated Common Stock Held by ESOP Unallocated Common Stock Held By ESOP [Member] Unallocated common stock held by ESOP. Schedule of Financing Receivable, Allowance for Credit Losses [Table] Financing Receivable, Allowance for Credit Loss [Table] Issuance of stock under incentive plans Proceeds from Issuance of Common Stock Gross losses Debt Securities, Available-for-Sale, Realized Loss All Individuals All Individuals [Member] Long-Term Debt, Type [Domain] Long-Term Debt, Type [Domain] Residential properties Residential Real Estate [Member] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Purchases of office properties and equipment Payments to Acquire Property, Plant, and Equipment Name Forgone Recovery, Individual Name Commitments which present an unusual risk Commitments Presenting Unusual Risk Commitments presenting unusual risk. Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Foreclosed Assets and ORE Financing Receivable, Real Estate Acquired Through Foreclosure [Policy Text Block] Shares distributed during the year (in shares) Employee Stock Ownership Plan (ESOP), Shares Contributed to ESOP Individually evaluated for impairment, Recorded investment in loans Financing Receivable, Individually Evaluated for Credit Loss Percent of outstanding common to be approved for restricted stock awards under the RRP (as percent) Share-Based Compensation Arrangement by Share-Based Payment Award, Percentage of Outstanding Stock Maximum Gross charge-offs, origination year - 4 year before current fiscal year Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff 2007 Salary Continuation Agreements 2007 Salary Continuation Agreements [Member] 2007 Salary continuation agreements. Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Other borrowings Other Borrowings Weighted Average Rate Advance from Federal Home Loan Bank, by Interest Rate Type, by Maturity [Abstract] Liabilities Derivative Liability [Abstract] Consolidated Quarterly Results of Operations (unaudited) Quarterly Financial Information [Text Block] Exercisable, Weighted-Average Grant Date Fair Value (in usd per share) Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Grant Date Fair Value Share based compensation arrangement by share based payment award options exercisable weighted average grant date fair value. Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Credit card receivables Credit Card Receivable [Member] Short-term FHLB Advances Federal Home Loan Bank Advances Disclosure Short Term [Text Block] Federal home loan bank advances, disclosure, short term. Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Title of 12(b) Security Title of 12(b) Security Provision for loan losses Provision for loan losses Provision (Reversal) Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal) Debt Securities, Available-for-sale, Unrealized Loss Position, Fair Value [Table] Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table] Earnings per share: Earnings Per Share [Abstract] 2030 Lessee, Operating Lease, Liability, to be Paid, Year Five Unallocated shares (in shares) Employee Stock Ownership Plan (ESOP), Number of Suspense Shares Britton & Koontz Britton And Koontz Bank [Member] Britton and Koontz bank. Common equity tier 1 capital ratio, To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio (as percent) Common Equity Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets Common equity tier one risk based capital required to be well capitalized to risk weighted assets. Quarterly Financial Information Disclosure [Abstract] Quarterly Financial Information Disclosure [Abstract] Gross charge-offs, origination year - 2 year before current fiscal year Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff Common Stock issued under incentive plans (in shares) Stock Issued during Period share under Incentive Plans, Net of Shares Surrendered in Payment Stock Issued during Period share under Incentive Plans, Net of Shares Surrendered in Payment Total risk-based capital, Minimum Capital Required - Basel III Fully Phased-In, Amount Risk Based Capital Minimum Capital Required Fully Phase In Risk based capital minimum capital required fully phase in. Effect of dilutive securities: Weighted Average Number of Shares Outstanding, Diluted, Adjustment [Abstract] Financing Receivable, Allowance for Credit Losses [Line Items] Financing Receivable, Allowance for Credit Loss [Line Items] Exercised, Weighted-Average Exercise Price (in usd per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price 2009 Stock Option Plan Two Thousand Nine Stock Option Plan [Member] Two thousand nine stock option plan. Award Timing Disclosures [Line Items] Fair Value, Measurement Frequency [Domain] Measurement Frequency [Domain] Federal Home Loan Banks [Abstract] Renewal term (in years) Lessee, Operating Lease, Renewal Term Amortization Servicing Asset at Amortized Cost, Amortization State Deferred State and Local Income Tax Expense (Benefit) Loan Restructuring Modification [Domain] Loan Restructuring Modification [Domain] Summary of Unpaid Principal Balance of Serviced Mortgage Loans for Others Schedule Of Mortgage Loans Sold And Serviced Unpaid Principal Balance [Table Text Block] Schedule of mortgage loans sold and serviced unpaid principal balance. Total loans, net of unearned income and allowance for loan losses Loans classified as credit cards Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss Net Income Net Income Income applicable to common shares Net Income (Loss) Attributable to Parent Total risk-based capital, Actual ratio (as percent) Banking Regulation, Total Risk-Based Capital Ratio, Actual Summary of Provision for Federal Income Taxes Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Award vesting period (in years) Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Other items, net (Percent) Effective Income Tax Rate Reconciliation, Other Adjustments, Percent Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Purchase of Company’s common stock Payments for Repurchase of Common Stock Adoption Date Trading Arrangement Adoption Date Reclassifications Reclassification, Comparability Adjustment [Policy Text Block] Mortgage loans sold to Federal Home Loan Bank without recourse Federal Home Loan Bank Certificates and Obligations (FHLB) [Member] Schedule of Financing Receivables Past Due [Table] Financing Receivable, Past Due [Table] Total operating income Operating Income (Loss) Interest rate Federal Home Loan Bank, Advances, Interest Rate Savings Interest-Bearing Domestic Deposit, Savings Retained earnings Retained Earnings (Accumulated Deficit) Other noninterest expense Other Non-Interest Expense [Member] Other Non-Interest Expense Home equity loans and lines Residential Portfolio Segment [Member] Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Total long-term FHLB advances Federal Home Loan Bank, Advances, Maturities Summary, Fixed Rate Servicing assets, discount rate (as percent) Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Discount Rate Number of related party loans not treated as impaired Related Party Loans Not Treated As Impaired Related party loans not treated as impaired. Increase in cash surrender value of bank-owned life insurance Life Insurance, Corporate or Bank Owned, Change in Value Percent of employee's pretax annual earnings allowed to be contributed into the plan (as percent) Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Other Deferred Tax Liabilities, Other Statement [Table] Statement [Table] Summary of Acquisition Activity Business Combination [Table Text Block] Deferred income tax benefit Deferred Deferred Income Tax Expense (Benefit) Adjustments to reconcile net income to net cash provided by operating activities: Adjustments to reconcile net income to net cash provided by operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Cash flows from financing activities, net of effects of acquisitions: Cash flows from financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] 30-89 Days Past Due Financial Asset, 30 to 89 Days Past Due [Member] Financial Asset, 30 to 89 Days Past Due Description of Business Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] All Adjustments to Compensation All Adjustments to Compensation [Member] Interest Rate Reduction Contractual Interest Rate Reduction [Member] Amendment Flag Amendment Flag Maximum number of shares issuable under the Stock Option Plan Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized Federal Reserve Discount Window and U.S. Bankruptcy Trustee Federal Reserve Discount Window And U.S. Bankruptcy Trustee [Member] Federal Reserve Discount Window And U.S. Bankruptcy Trustee Termination Date Trading Arrangement Termination Date Contributions for the plan necessary to amortize the debt to the company, period (in years) Contributions For Plan Necessary To Amortize Debt To Company Period Contributions for the plan necessary to amortize the debt to the company, period. Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] 2028 Time Deposit Maturities, Year Three Allowance for loan losses Beginning Balance Ending Balance Allowance for loan losses ACL Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest Weighted average discount rate Operating Lease, Weighted Average Discount Rate, Percent Company's loans Loans and Finance Receivables [Member] Summary of Stock Option Activity Share-Based Payment Arrangement, Option, Activity [Table Text Block] Weighted average common shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic Summary of Earnings Per Common Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Exercisable, Number of Options (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number Summary of Deposits Classifications Deposit Liabilities, Type [Table Text Block] Income tax interest or penalties Income Tax Examination, Penalties and Interest Expense Schedule Of Summary Of Significant Accounting Policies [Table] Schedule Of Summary Of Significant Accounting Policies [Table] Schedule Of Summary Of Significant Accounting Policies [Table] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Summary of Unvested Restricted Stock Activity Schedule of Unvested Restricted Stock Units Roll Forward [Table Text Block] Additional FHLB advances Federal Home Loan Bank, Advances, General Debt Obligations, Amount of Available, Unused Funds Exercise of stock options Income Tax Reconciliation Exercise of stock options Income tax reconciliation exercise of stock options. Proceeds from sale of foreclosed assets Proceeds from Sale of Foreclosed Assets Unrealized gains on available for sale investment securities OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment and Tax Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Other borrowings Other Borrowings Fair Value Disclosure Other Borrowings Fair Value Disclosure Consolidated Entities [Axis] Consolidated Entities [Axis] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Common stock, par value (in usd per share) Common Stock, Par or Stated Value Per Share AAA/AA/A Standard & Poor's, AAA or AA or A Rating [Member] Standard & Poor's, AAA or AA or A Rating Granted, Number of Options (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross Use of Estimates Use of Estimates, Policy [Policy Text Block] Total risk-based capital, Actual amount Banking Regulation, Total Capital, Actual Occupancy Occupancy, Net Netting adjustments Derivative Asset, Subject to Master Netting Arrangement, Liability Offset Insider Trading Arrangements [Line Items] Prior Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year Forfeited, Weighted-Average Exercise Price (in usd per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Current Loans Current Financial Asset, Not Past Due [Member] Allowance for credit losses on available-for-sale securities Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest Securities held-to-maturity, Unrealized Losses Debt Securities, Held-to-Maturity, Unrealized Loss Position, Accumulated Loss [Abstract] Total Liabilities Liabilities Percent of Total Class of Loans (as percent) Financing Receivable, Excluding Accrued Interest, Modified in Period, to Total Financing Receivables, Percentage Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Increase in loans, net Payments for (Proceeds from) Loans and Leases Foreclosed assets and ORE Other Real Estate, Foreclosed Assets, and Repossessed Assets Other noninterest income Other Noninterest Income [Member] Other Noninterest Income Total long-term FHLB advances Federal Home Loan Bank, Advances, Weighted Average Interest Rate Subordinated debt expense Interest Expense, Subordinated Notes and Debentures Number of loans experiencing subsequent default after modification Financing Receivable, Excluding Accrued Interest, Modified, Subsequent Default, Number Financing Receivable, Excluding Accrued Interest, Modified, Subsequent Default, Number Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Non-NEOs Non-NEOs [Member] UNITED STATES