Tier 1 leverage, For Capital Adequacy Purposes, Amount Banking Regulation, Tier One Leverage Capital, Capital Adequacy, Minimum Deposit intangible Deferred Tax Liabilities, Intangible Assets Troubled Debt Restructurings on Financing Receivables Financing Receivable, Troubled Debt Restructuring [Table Text Block] Originations of loans receivable held-for-sale ("LHFS") Payments for Origination of Mortgage Loans Held-for-sale Commitments And Contingencies Commitments and Contingencies Disclosure [Text Block] Securities Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Number of shares acquired by ESOP post corporate reorganization Number Of Shares Acquired By Employee Stock Ownership Plan Post Corporate Reorganization Number Of Shares Acquired By Employee Stock Ownership Plan Post Corporate Reorganization OREO, measurement input Other Real Estate Owned, Measurement Input Weighted average effective interest rate on FHLB advances Effective Rate FHLB Advances States the interest rate applicable to Federal Home Loan Bank advances outstanding as of the Balance Sheet date, including the net impact of interest rate swaps and the amortization of deferred prepayment penalties Deferred prepayment penalty Prepayment Penalty On FHLB Advances Penalty paid as a result of prepaying FHLB advances. Deferred penalty is recognized in interest expense over the life of the new advances. Deposit service fees [Member] Deposit Account [Member] Goodwill, Purchase Accounting Adjustments Goodwill, Purchase Accounting Adjustments Low Income Housing Partnerships Affordable Housing Program [Text Block] Estimated Selling Costs [Member] Measurement Input, Cost to Sell [Member] LIABILITIES AND STOCKHOLDERS' EQUITY Liabilities and Equity [Abstract] Statistical Measurement [Domain] Statistical Measurement [Domain] FHLB borrowings threshold percentage of regulatory assets, temporary increase FHLB borrowings threshold percentage of regulatory assets, temporary increase Increased FHLB borrowing limit (as a percentage of regulatory assets) as approved by the FHLB president for one year. Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Salaries and employee benefits Labor and Related Expense CET1 capital, Actual Ratio Banking Regulation, Common Equity Tier One Risk-Based Capital Ratio, Actual Name of exchange on which securities are registered Security Exchange Name Employee Benefit Plans Compensation and Employee Benefit Plans [Text Block] Goodwill, Amortization Amortization Of Goodwill The aggregate expense charged against earnings to amortize goodwill Net change in deposits Increase (Decrease) in Deposits Deposit and loan transaction costs Deposit And Loan Transaction Costs Expense paid for miscellaneous loan fees that are not deferred, and fees related to deposit transactions, such as debit card processing, electronic banking, and ATM networks. Unvested restricted stock at end of year, 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 Restricted stock activity, net Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures ASSETS: Assets [Abstract] Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Accounting Policies [Abstract] Accounting Policies [Abstract] Cash acquired from acquisition Cash Acquired from Acquisition Loans and Leases Receivable Disclosure [Abstract] Loans and Leases Receivable Disclosure [Abstract] Tier 1 capital, For Capital Adequacy Purposes, Ratio Banking Regulation, Tier One Risk-Based Capital Ratio, Capital Adequacy, Minimum Capitol Federal Savings Bank [Member] Subsidiaries [Member] Schedule of Goodwill and Intangible Assets [Line Items] Schedule of Goodwill and Intangible Assets [Line Items] [Line Items] for Schedule of Goodwill and Intangible Assets [Table] Schedule Of Statements Of Cash Flows Condensed Cash Flow Statement [Table Text Block] Cash paid for amounts included in the measurement of lease liabilities Operating Lease, Payments PCI Loans Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance Accumulated Other Comprehensive Income Comprehensive Income (Loss) Note [Text Block] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Other comprehensive income (loss), before reclassifications - Cash Flow Hedges Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax Other intangible assets, estimated life Acquired Finite-lived Intangible Assets, Weighted Average Useful Life Fiscal year 2021 Lessee, Operating Lease, Liability, to be Paid, Year One Options outstanding at end of year, number of options Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number FHLB borrowings threshold percentage of regulatory assets F H L B Borrowings Threshold Percentage Of Regulatory Assets FHLB Borrowings Threshold Percentage Of Regulatory Assets Fiscal year 2024 Lessee, Operating Lease, Liability, to be Paid, Year Four Unrecognized total future compensation cost Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Income allocated to participating securities Undistributed Earnings (Loss) Allocated to Participating Securities, Basic Current, State Current State and Local Tax Expense (Benefit) Preferred stock, $.01 par value; 100,000,000 shares authorized, no shares issued or outstanding Preferred stock, $.01 par value; 100,000,000 shares authorized, no shares issued or outstanding Preferred Stock, Value, Issued One- to Four-Family Segment [Member] Residential Portfolio Segment [Member] Common stock, par value Common Stock, Par or Stated Value Per Share Impaired loans with related allowance, Recorded Investment Impaired Financing Receivable, with Related Allowance, Recorded Investment Impaired loans with related allowance, Average Recorded Investment Impaired Financing Receivable, with Related Allowance, Average Recorded Investment Measurement Frequency [Domain] Measurement Frequency [Domain] Fair value of liabilities assumed Liabilities Assumed Financing receivable, current loans Financing Receivable, Not Past Due Noninterest-bearing deposits Noninterest-bearing Deposit Liabilities, Domestic Statement [Line Items] Statement [Line Items] Interest rate swaps, future amount to be reclassified from AOCI Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred Certificates of Deposit Due in 2021 Time Deposit Maturities, Year One FHLB Advances, Term Debt Instrument, Term Measurement Input Type [Domain] Measurement Input Type [Domain] Statement [Table] Statement [Table] Statistical Measurement [Axis] Statistical Measurement [Axis] Amortization of deferred amounts related to FHLB advances, net Amortization of Deferred Amounts Related to fhlb Advances, Net Includes amortization of deferred gains and prepayment penalties related to FHLB advances or derivatives related to FHLB advances. FHLB stock dividends Deferred Tax Liabilities Federal Home Loan Bank Stock Dividends Deferred income tax liabilities relating to FHLB stock dividends. FRB of Kansas City Pledged Financial Instruments, Not Separately Reported, Securities for Other Debt Facilities Regulatory Capital Requirements Regulatory Capital Requirements under Banking Regulations [Text Block] Fair Value, Nonrecurring [Member] Fair Value, Nonrecurring [Member] Weighted Average [Member] Weighted Average [Member] Smaller Reporting Company indicator Entity Small Business Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value Hierarchy and NAV [Domain] Deposits and Borrowed Funds Debt Disclosure [Text Block] Total interest and dividend income Total interest and dividend income Interest and Dividend Income, Operating Amendment Flag Amendment Flag CET1 capital, To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio Common Equity Tier 1 Capital Ratio Required To Be Well Capitalized The Common Equity Tier 1 Capital Ratio required to be categorized as "well capitalized" under the regulatory framework for prompt corrective action. Income taxes receivable/payable Increase Decrease Income Taxes The net change during a reporting period of income taxes payable/receivable and deferred income tax assets/liabilities. Number of shares available for future grants Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Interest rate swaps, amount reclassified from AOCI Amount reclassified from AOCI - Cash Flow Hedges Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax Measurement Frequency [Axis] Measurement Frequency [Axis] FHLB Advances Due in 2023 Federal Home Loan Bank, Advance, Maturity, Year Three Loan-to-value ratio securing commercial real estate loans, maximum Loan To Value Ratio For Securing Commercial Real Estate Loans Maximum Loan To Value Ratio For Securing Commercial Real Estate Loans Maximum Financial Instruments [Domain] Financial Instruments [Domain] Schedule Of Carrying Amounts And Estimated Fair Values Of Financial Instruments Fair Value, by Balance Sheet Grouping [Table Text Block] Fair Value, Disclosure Item Amounts [Domain] Fair Value Measurement [Domain] CBLR, Actual Ratio Community Bank Leverage Ratio Capital to Average Assets Ratio of Community Bank Leverage Ratio capital to average assets as defined by regulatory framework. Impaired loans with related allowance, Unpaid Principal Balance Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance Available-for-sale Securities, Continuous Unrealized Loss Position, Equal to or Greater Than 12 Months, Estimated Fair Value Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer Accounts payable and accrued expenses Accounts Payable and Other Accrued Liabilities Affordable housing tax credits, amount Affordable Housing Tax Credits and Other Tax Benefits, Amount Non-taxable Interest Income, Securities, Operating, Tax Exempt Traditional Banking Offices [Member] Traditional Banking Offices [Member] Traditional Banking Offices [Member] Dividend income from the Bank Dividend Income From Bank Dividend income from bank subsidiary. Marketable Securities [Line Items] Marketable Securities [Line Items] Loans receivable Interest and Fee Income, Loans and Leases Financing Receivable, Credit Quality Indicator [Line Items] Financing Receivable, Credit Quality Indicator [Line Items] Interest-earning deposits Interest-bearing Deposits in Banks and Other Financial Institutions Effect of dilutive stock options Weighted Average Number Diluted Shares Outstanding Adjustment Long-Lived Tangible Asset [Axis] Long-Lived Tangible Asset [Axis] Capital City Bancshares, Inc. ("CCB") acquisition Stock Issued During Period, Value, Acquisitions Average Common Shares Outstanding [Member] Average Common Shares Outstanding [Member] Average common shares outstanding Income Statement Location [Domain] Income Statement Location [Domain] Fiscal year 2022 Lessee, Operating Lease, Liability, to be Paid, Year Two Unrealized Gains (Losses) on Cash Flow Hedges [Member] Accumulated Gain (Loss), Cash Flow Hedge, Including Noncontrolling Interest [Member] CASH FLOWS FROM FINANCING ACTIVITIES: Net Cash Provided by (Used in) Financing Activities [Abstract] Escrow balances on loans serviced for others escrow balances held on loans serviced for others Escrow balances held by the Bank on loans serviced for others. Net purchase discounts related to acquired loans Deferred Tax Assets, Deferred Income Schedule of Lease Expenses and Cash Flow Information Lease, Cost [Table Text Block] Proceeds from sales of LHFS Proceeds from Sale of Mortgage Loans Held-for-sale Fiscal year 2023 Lessee, Operating Lease, Liability, to be Paid, Year Three Plan Name [Axis] Plan Name [Axis] Cash and cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Tier 1 capital, Actual Amount Banking Regulation, Tier One Risk-Based Capital, Actual TOTAL ASSETS Assets Cash and cash equivalents Interest Income, Deposits with Financial Institutions Unvested restricted stock at end of year, number of shares Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Incentive Stock Options [Member] Incentive Stock Options [Member] Incentive Stock Options [Member] Depreciation and amortization of premises and equipment Depreciation of equipment Depreciation, Nonproduction Recorded investment in loans individually evaluated for impairment Financing Receivable, Individually Evaluated for Impairment Earnings Per Share Reconciliation Effect On Basic Earnings Per Share [Axis] Earnings Per Share Reconciliation Effect On Basic Earnings Per Share [Axis] Earnings Per Share Reconciliation, Effect On Basic Earnings Per Share [Axis] Commercial Real Estate [Member] Commercial Real Estate Portfolio Segment [Member] Federal Home Loan Bank Topeka ("FHLB") stock, at cost Federal Home Loan Bank Stock Financing Receivable Portfolio Segment [Domain] Financing Receivable Portfolio Segment [Domain] Trust Asset Management Trust Asset Management [Policy Text Block] The accounting policy for treatment of trust assets Fair value of restricted stock vested during the period Share based compensation arrangement by share based payment award restricted stock vested in period fair value Fair value of restricted stock that vested during the period. Regulatory and Outside Services [Member] Regulatory and Outside Services [Member] Primary financial statement caption encompassing regulatory and outside services Total liabilities Liabilities Financing Receivable, by Credit Quality Indicator [Domain] Internal Credit Assessment [Domain] Mortgage-backed securities ("MBS") Interest Income, Securities, Mortgage Backed Amounts representing interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount FHLB percentage of regulatory assets Fhlb Percentage Of Regulatory Assets FHLB advances as a percentage of total assets reported to regulator. FHLB stock FHLB stock dividends Dividend Income, Operating Carrying value of residential OREO Real Estate Acquired Through Foreclosure Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] Fair Value, Inputs, Level 1 [Member] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Impaired loans, Average Recorded Investment Impaired Financing Receivable, Average Recorded Investment Available-for-sale Securities, Continuous Unrealized Loss Position, Less Than 12 Months, Estimated Fair Value Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months Accounting Standards Update 2016-09 [Member] Accounting Standards Update 2016-09 [Member] Additional Paid-In Capital [Member] Additional Paid-in Capital [Member] NET INTEREST INCOME Net interest and dividend income Interest Income (Expense), Net Deposits Interest Expense, Deposits Assets: Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] Trust Preferred Securities [Member] Trust Preferred Securities [Member] A collateralized debt obligation backed by a shared pool of trust preferred securities. Issuers include companies in highly regulated industries such as banks, insurance companies and regulated utilities as well as some general corporate issuers. Most are rated by one or more of the standard rating agencies. Other assets Other Assets Unrealized gain on AFS securities Deferred Tax Liabilities, Unrealized Gains On Available-for-Sale Securities Amount of deferred tax liability attributable to taxable temporary differences from unrealized gains on available-for-sale securities. Weighted Average Loan-to-Value and Credit Score Information Financing Receivable Credit Quality Indicator Loan To Value And Credit Scores [Table Text Block] Financing Receivable Credit Quality Indicator Loan To Value And Credit Scores Internal Credit Assessment [Axis] Internal Credit Assessment [Axis] Common stock, shares outstanding Common Stock, Shares, Outstanding Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Proceeds from sale of other real estate owned ("OREO") Proceeds from Sale of Foreclosed Assets Debt [Line Items] Short-term Debt [Line Items] IPO [Member] IPO [Member] Other, Percentage Effective Income Tax Rate Reconciliation, Other Adjustments, Percent Home Equity [Member] Home Equity Line of Credit [Member] Options outstanding at end of year, weighted average exercise price Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Common stock, shares authorized Common Stock, Shares Authorized Summary Of Capital And Total Risk-Based Capital Ratios Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block] Property, plant and equipment, gross Property, Plant and Equipment, Gross Stock options exercised Proceeds from Stock Options Exercised Deferred, Federal Deferred Federal Income Tax Expense (Benefit) Impaired loans, Related ACL Impaired Financing Receivable, Related Allowance Income Statement [Abstract] Income Statement [Abstract] AOCI [Member] AOCI Attributable to Parent [Member] Schedule Of Contractual Maturities Investments Classified by Contractual Maturity Date [Table Text Block] Required Capital Conservation Buffer Required Capital Conservation Buffer Amount of required capital conservation buffer above minimum risk-based capital ratios Insurance commissions [Member] Insurance Services [Member] Services provided in the capacity of an agent between the Company's customer and the insurance carrier Repayment of other borrowings Repayments of Subordinated Debt Loans transferred to LHFS Transfer of Portfolio Loans and Leases to Held-for-sale Commitments Outstanding To Originate, Purchase, Or Participate In Loans Commitments Outstanding To Originate And Purchase Loans [Table Text Block] Commitments Outstanding To Originate And Purchase Loans [Table Text Block] Consolidated Entities [Axis] Consolidated Entities [Axis] Scenario [Domain] Scenario [Domain] Impaired loans with no related allowance, Average Recorded Investment Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment Purchase of premises and equipment Purchase of equipment Payments to Acquire Property, Plant, and Equipment FHLB Advances Due in 2025 Federal Home Loan Bank, Advance, Maturity, Year Five Intangible Assets Goodwill and Intangible Assets Disclosure [Text Block] Shares of common stock reserved for future issuance Common Stock, Capital Shares Reserved for Future Issuance Recorded investment of loans in process of foreclosure Mortgage Loans in Process of Foreclosure, Amount INCOME BEFORE INCOME TAX EXPENSE INCOME BEFORE INCOME TAX EXPENSE AND EQUITY IN EXCESS OF DISTRIBUTION OVER EARNINGS OF SUBSIDIARY Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Salaries, deferred compensation and employee benefits Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Benefits Capital contribution to subsidiary in conjunction with acquisition of CCB Capital Contributions To Subsidiaries The fair value of capital contributions to subsidiaries during the period in noncash transactions CET1 capital, To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount Banking Regulation, Common Equity Tier One Risk-Based Capital, Well Capitalized, Minimum Goodwill, impairment recorded Goodwill, Impaired, Accumulated Impairment Loss NET (DECREASE) INCREASE IN CASH, CASH EQUIVALENTS, RESTRICTED CASH AND RESTRICTED CASH EQUIVALENTS Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect Lease liability, balance sheet location Operating Lease, Liability, Statement of Financial Position [Extensible List] Marketable Securities [Table] Marketable Securities [Table] Goodwill recognized upon acquisition of CCB Goodwill, Acquired During Period Goodwill, Acquired During Period Financing Receivable, Troubled Debt Restructuring [Line Items] Financing Receivable, Troubled Debt Restructuring [Line Items] Amortized Cost, Estimated Fair Value, and Gross Unrealized Gains and Losses Of AFS Securities Debt Securities, Available-for-sale [Table Text Block] Selected Quarterly Financial Data (Unaudited) Quarterly Financial Information [Text Block] Number of Contracts Financing Receivable, Modifications, Number of Contracts FHLB Advances Due in 2022 Federal Home Loan Bank, Advance, Maturity, Year Two Property, Plant and Equipment, Net [Abstract] Property, Plant and Equipment, Net [Abstract] Thereafter Operating Leases, Future Minimum Payments, Due Thereafter Lessee, Lease, Description [Line Items] Lessee, Lease, Description [Line Items] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] 2020 Operating Leases, Future Minimum Payments Due, Next Twelve Months Total capital, Actual Ratio Banking Regulation, Total Risk-Based Capital Ratio, Actual Average Committed ESOP Shares Outstanding [Member] Average Committed Employee Stock Ownership Plan Shares Outstanding [Member] Average committed employee stock ownership plan shares outstanding Restricted cash and cash equivalents Restricted Cash and Cash Equivalents Available-for-sale ("AFS") securities, at estimated fair value Available-for-sale Securities, Estimated Fair Value Available-for-sale Securities, Estimated Fair Value AFS securities Debt Securities, Available-for-sale Restricted Stock Plans [Member] Restricted Stock [Member] Financing receivable, total delinquent loans Financing Receivable, Past Due Consolidated Entities [Domain] Consolidated Entities [Domain] Land [Member] Land [Member] Revenue from Contract with Customer [Line Items] Revenue from External Customer [Line Items] Recorded investment in loans collectively evaluated for impairment Financing Receivable, Collectively Evaluated for Impairment Schedule of Short-term Debt [Table] Schedule of Short-term Debt [Table] Financial Asset, Equal to or Greater than 90 Days Past Due [Member] Financial Asset, Equal to or Greater than 90 Days Past Due [Member] Federal insurance premium Federal Deposit Insurance Corporation Premium Expense Class of Financing Receivable [Domain] Financing Receivable, Recorded Investment, Class of Financing Receivable [Domain] Class of Financing Receivable [Domain] Fair Value Of Financial Instruments Fair Value Disclosures [Text Block] Loans Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Repurchase Agreements Securities Sold under Agreements to Repurchase Cumulative effect of adopting ASU [Member] Cumulative Effect, Period of Adoption, Adjustment [Member] Tier 1 capital, For Capital Adequacy Purposes, Amount Banking Regulation, Tier One Risk-Based Capital, Capital Adequacy, Minimum Additional paid-in capital Additional Paid in Capital, Common Stock Registrant Name Entity Registrant Name Securities: Marketable Securities [Abstract] Business Acquisition [Line Items] Business Acquisition [Line Items] Operating leases, weighted average discount rate Operating Lease, Weighted Average Discount Rate, Percent Schedule of Goodwill and Intangible Assets [Table] Schedule of Goodwill and Intangible Assets [Table] Schedule of Goodwill and Intangible Assets [Table] Repayments on borrowings Payments of FHLBank Borrowings, Financing Activities Available-for-sale Securities, One year or less, Amortized Cost Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, Year One CET1 capital, For Capital Adequacy Purposes, Amount Banking Regulation, Common Equity Tier One Risk-Based Capital, Capital Adequacy, Minimum Open tax year Open Tax Year State of incorporation Entity Incorporation, State or Country Code Other Comprehensive Income Components [Axis] Other Comprehensive Income Location [Axis] Originate fixed-rate Loans and Leases Receivable, Commitments, Fixed Rates Accounting Standards Update [Axis] Accounting Standards Update [Axis] ESOP related expenses, net, Percentage Effective Income Tax Rate ESOP Related Expenses Net Effective income tax rate ESOP related expenses, net. Schedule of Employee Stock Ownership Plan (ESOP) Disclosures [Table] Schedule of Employee Stock Ownership Plan (ESOP) Disclosures [Table] Available-for-sale Securities, Gross Unrealized Losses Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax Loans Receivable Financing Receivable, Held-for-investment [Policy Text Block] Operating leases, remaining term Lessee, Operating Lease, Remaining Lease Term Subsidiary, Sale of Stock [Axis] Sale of Stock [Axis] Accounting Standards Update 2016-02 [Member] Accounting Standards Update 2016-02 [Member] Zip code of principal executive offices location Entity Address, Postal Zip Code Purchase/participate fixed-rate Commitments Outstanding To Purchase Fixed Rate Commitment to purchase/participate fixed-rate loans. Gross deferred income tax asset, net of valuation allowance Deferred Tax Assets, Net of Valuation Allowance ACL Deferred Tax Liabilities, Allowance For Credit Losses Amount of deferred tax liability attributable to deductible temporary differences related to state provision for loan losses Plan expiration date Share-based Compensation Arrangement by Share-based Payment Award, Expiration Date Goodwill Balance Goodwill Balance Goodwill Fair value of assets acquired, excluding acquired cash and intangibles Fair Value of Assets Acquired Cash dividends to stockholders Dividends declared per share Common Stock, Dividends, Per Share, Declared Junior subordinated debentures Debt Instrument, Face Amount Building and Improvements [Member] Building and Building Improvements [Member] Recorded Investment in Loans, Nonaccrual Financing Receivable, Nonaccrual [Table Text Block] Investment Holdings [Line Items] Investment Holdings [Line Items] INTEREST AND DIVIDEND INCOME: Interest and Dividend Income, Operating [Abstract] Equity [Abstract] Equity [Abstract] Assets, Fair Value Disclosure Assets, Fair Value Disclosure Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] FHLB Advances Due Thereafter Federal Home Loan Bank, Advance, Maturity, after Year Five SUPPLEMENTAL DISCLOSURE OF NONCASH INVESTING AND FINANCING ACTIVITIES: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Schedule of Goodwill and Intangible Assets Schedule of Intangible Assets and Goodwill [Table Text Block] Office supplies and related expense Supplies and Postage Expense Provision for credit losses Provision for Loan, Lease, and Other Losses Schedule of Core Deposit and Other Intangible Assets, Future Amortization Expense Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Total diluted average common shares outstanding Average number of diluted shares outstanding Weighted Average Number of Shares Outstanding, Diluted Acquired BOLI policies, Amount Income Tax Reconciliation BOLI Income Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to change in cash surrender value of acquired bank-owned life insurance policies Obligations related to investments in affordable housing limited partnerships Qualified Affordable Housing Project Investments, Commitment Fair value of stock options vested during the period Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, In Period, Fair Value Fair value of stock options vested during the period. Debt Disclosure [Abstract] Debt Disclosure [Abstract] Right-of-use asset, balance sheet location Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] Transfer of HTM securities, at amortized cost, to AFS securities Debt Securities, Held-to-maturity, Transfer, Amount Net cash provided by (used in) financing activities Net cash used in financing activities Net Cash Provided by (Used in) Financing Activities Debt, Type [Axis] Short-term Debt, Type [Axis] Post-Restructured Outstanding Financing Receivable, Troubled Debt Restructuring, Postmodification Substandard [Member] Substandard [Member] Restricted cash and cash equivalents, balance sheet location Restricted Cash and Cash Equivalents, Asset, Statement of Financial Position [Extensible List] Interchange network charges Interchange Network Charges Transaction related costs paid in order to participate in debit card payment networks Unrecognized tax benefits Unrecognized Tax Benefits Common stock, $.01 par value; 1,400,000,000 shares authorized, 138,956,296 and 141,440,030 shares issued and outstanding as of September 30, 2020 and 2019, respectively Common stock, $.01 par value; 1,400,000,000 shares authorized, 138,956,296 and 141,440,030 shares issued and outstanding as of September 30, 2020 and 2019, respectively Common Stock, Value, Issued Unreleased ESOP shares Employee Stock Ownership Plan (ESOP), Number of Suspense Shares Document Fiscal Year Focus Document Fiscal Year Focus 2022 Finite-Lived Intangible Asset, Expected Amortization, Year Two Regulatory and outside services Regulatory And Professional Fees Fees charged for services from professionals such as lawyers and accountants, and fees paid to regulators for conducting regulatory examinations. Entity current reporting status indicator Entity Current Reporting Status Outstanding discounts Discounts/unearned loan fees Loans and Leases Receivable, Deferred Income Purchase of AFS securities Payments to Acquire Debt Securities, Available-for-sale Earnings Per Share Earnings Per Share, Policy [Policy Text Block] Loans receivable, gross Loans and Leases Receivable, before Fees, Gross Summary Of Significant Accounting Policies [Line Items] Summary Of Significant Accounting Policies [Line Items] Summary Of Significant Accounting Policies [Line Items] Closing stock price Business Acquisition, Share Price Special Mention [Member] Special Mention [Member] Common stock, shares issued Common Stock, Shares, Issued Cash and cash equivalents (includes interest-earning deposits of $172,430 and $198,809) Cash and cash equivalents Beginning of year End of year Cash and Cash Equivalents, at Carrying Value ACL Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Provision for Loan Losses Schedule of Impaired Financing Receivable [Table] Schedule of Impaired Financing Receivable [Table] Operating Lease, Liability Lease liability, amount Present value of net future minimum lease payments Operating Lease, Liability Net deferred tax liabilities Deferred Tax Liabilities, Net FHLB Advances, Prepayment Penalties Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Repayment and Penalties Total stockholders' equity Balance Balance Cumulative effect of adopting ASU Stockholders' Equity Attributable to Parent Description of Business Nature of Operations [Text Block] Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table] Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table] Total merger consideration Business Combination, Consideration Transferred Number of common stock shares issued Business Acquisition, Equity Interest Issued or Issuable, Number of Shares City of principal executive offices location Entity Address, City or Town Fair Value, Hierarchy [Axis] Fair Value Hierarchy and NAV [Axis] Fiscal year 2025 Lessee, Operating Lease, Liability, to be Paid, Year Five Financial Instrument [Axis] Financial Instrument [Axis] Accounting Standards Update [Domain] Accounting Standards Update [Domain] 2023 Operating Leases, Future Minimum Payments, Due in Four Years Short-term lease expense Short-term Lease, Cost Loss on disposal of premises and equipment Gain (Loss) on Disposition of Property Plant Equipment Certificates of Deposit Due in 2023 Time Deposit Maturities, Year Three CET1 capital, Actual Amount Banking Regulation, Common Equity Tier One Risk-Based Capital, Actual Cash dividends paid Payments of Dividends Lease right-of-use assets Deferred Tax Liabilities, Leasing Arrangements Valuation allowance Valuation allowance Deferred Tax Assets, Valuation Allowance LIABILITIES: Liabilities [Abstract] Certificates of Deposit Due in 2024 Time Deposit Maturities, Year Four 2023 Finite-Lived Intangible Asset, Expected Amortization, Year Three Revenue Recognition Revenue from Contract with Customer [Policy Text Block] Premiums/deferred costs Loans And Leases Receivable Premiums Deferred Costs Amount of deferred premiums over face amounts of purchased and acquired loans and unamortized costs incurred to originate loans. Fair value of deposits acquired Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Deposits The fair value of customer deposits acquired in a business combination Share-based Payment Arrangement, Disclosure [Abstract] Share-based Payment Arrangement, Disclosure [Abstract] Other comprehensive income (loss), net of tax Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax Leases [Abstract] Weighted average LTV Weighted Average Loan To Value Ratio Weighted Average Loan To Value Ratio. Other non-interest expense Other non-interest expense Other Noninterest Expense Impaired loans with no related allowance, Interest Income Recognized Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method Available-for-sale Securities, One year through five years, Amortized Cost Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year One Through Five CBLR, For Capital Adequacy Purposes, Amount Community Bank Leverage Ratio Capital Required for Capital Adequacy Amount of minimum Community Bank Leverage Ratio capital required for capital adequacy as defined by regulatory framework Earnings Per Share [Abstract] Earnings Per Share [Abstract] NET INTEREST INCOME AFTER PROVISION FOR CREDIT LOSSES Interest Income (Expense), after Provision for Loan Loss Parent Company Financial Information (Parent Company Only) Condensed Financial Information of Parent Company Only Disclosure [Text Block] Components Of Net Deferred Income Tax Liabilities Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] State taxes, net of Federal tax effect, Percentage Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent Unrestricted cash collateral (provided to)/received from derivative counterparties, net Increase (Decrease) Cash Collateral from Counterparties STOCKHOLDERS' EQUITY: Stockholders' Equity Attributable to Parent [Abstract] 2025 Finite-Lived Intangible Asset, Expected Amortization, Year Five Document Fiscal Period Focus Document Fiscal Period Focus Filer category Entity Filer Category Common Stock [Member] Common Stock [Member] Product and Service [Domain] Product and Service [Domain] Financing Receivable, Allowance for Credit Loss [Table] Financing Receivable, Allowance for Credit Loss [Table] Recorded Investment Financing Receivable, Troubled Debt Restructuring, Subsequent Default Municipal Bonds [Member] Municipal Bonds [Member] Stock Option Plans [Member] Share-based Payment Arrangement [Member] Investment in the Bank Investment In Bank And Parent Company Parent company investment in bank subsidiary. Acquisition Business Combination Disclosure [Text Block] Unrealized gains on securities reclassified from held-to-maturity ("HTM") to AFS during the period, net of taxes of $0, $(750), and $0 Transfer of HTM securities to AFS securities OCI, Debt Securities, Available-for-Sale, Transfer from Held-to-Maturity, Gain (Loss), before Adjustment, after Tax NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS Cash and Cash Equivalents, Period Increase (Decrease) Condensed Financial Information Disclosure [Abstract] Condensed Financial Information Disclosure [Abstract] Unrealized Gains (Losses) on AFS Securities [Member] AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Including Noncontrolling Interest [Member] Sale of Stock, Name of Transaction [Domain] Sale of Stock [Domain] Other than temporary impairments, amount Other than Temporary Impairment Losses, Investments Deferred, State Deferred State and Local Income Tax Expense (Benefit) FHLB Advances Due in 2024 Federal Home Loan Bank, Advance, Maturity, Year Four Interest payments Interest Paid, Excluding Capitalized Interest, Operating Activities Financing Receivable, Past Due [Line Items] Financing Receivable, Past Due [Line Items] 2021 Finite-Lived Intangible Asset, Expected Amortization, Year One 2022 Operating Leases, Future Minimum Payments, Due in Three Years ESOP loan maturity date Debt Instrument, Maturity Date Diluted EPS Diluted Diluted EPS Earnings Per Share, Diluted 2021 Operating Leases, Future Minimum Payments, Due in Two Years Shares Held In Employee Stock Ownership Plan, Committed-to-be-Released Employee Stock Ownership Plan (ESOP), Number of Committed-to-be-Released Shares Allocated ESOP shares Employee Stock Ownership Plan (ESOP), Number of Allocated Shares Proceeds from sale of AFS securities Proceeds received from sale of AFS securities Proceeds from Sale of Debt Securities, Available-for-sale EQUITY IN EXCESS OF DISTRIBUTION OVER EARNINGS OF SUBSIDIARY Equity in excess of distribution over earnings of subsidiary Equity In Excess Of Distribution Over Undistributed Earnings Of Subsidiary Equity in excess of distribution over/(undistributed) earnings of subsidiary Note receivable - ESOP E S O P Note Receivable ESOP note receivable. OREO Other Real Estate Other Assets Goodwill and Intangible Assets, Policy [Policy Text Block] Address of principal executive offices location Entity Address, Address Line One Low income housing tax credits, net, Amount Effective Income Tax Rate Reconciliation, Tax Credit, Amount Emerging Growth Company indicator Entity Emerging Growth Company Tier 1 leverage, Actual Amount Banking Regulation, Tier One Leverage Capital, Actual Provision for deferred income taxes Deferred Income Tax Expense (Benefit) Total capital, Actual Amount Banking Regulation, Total Capital, Actual Interest income on investment securities Interest and Dividend Income, Securities, Operating FHLB Advances, Variable Rate Federal Home Loan Bank, Advances, Maturities Summary, Floating Rate Maximum [Member] Maximum [Member] Preferred stock, shares authorized Preferred Stock, Shares Authorized Schedule Of Taxable And Non-taxable Components Of Interest Income Interest Income and Interest Expense Disclosure [Table 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] Effective income tax rate Income tax expense, Percentage Effective Income Tax Rate Reconciliation, Percent Net Presentation of Cash Flows Related to Borrowings Net Presentation of Cash Flows Related to Borrowings [Policy Text Block] Disclosure of accounting policy for net presentation of cash flows related to borrowings Certificates of Deposit Amount Interest-bearing Domestic Deposit, Certificates of Deposits Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Compensation expense related to the ESOP including dividends Employee Stock Ownership Plan ESOP Compensation Expense Including Dividends On Unallocated Shares In Excess Of Debt Service Payments Employee Stock Ownership Plan ESOP Compensation Expense Including Dividends On Unallocated Shares In Excess Of Debt Service Payments Interest-bearing deposits held at the Federal Reserve Bank Interest Bearing Deposits Held At Federal Reserve Bank Interest Bearing Deposits Held At Federal Reserve Bank Trading symbol Trading Symbol Schedule Of Balance Sheets Condensed Balance Sheet [Table Text Block] Construction [Member] Construction Loans [Member] Interest income from other investments Other Interest and Dividend Income Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Prepaid FHLB Advances [Member] Prepaid FHLB Advances [Member] Prepaid FHLB Advances [Member] CET1 capital, For Capital Adequacy Purposes, Ratio Common Equity Tier 1 Capital, For Capital Adequacy Purposes, Ratio The minimum Common Equity Tier 1 Capital Ratio required for capital adequacy purposes as defined by the regulators. Shell company indicator Entity Shell Company Fair Value, Recurring [Member] Fair Value, Recurring [Member] Loans Receivable And Allowance For Credit Losses Financing Receivables [Text Block] Segment Information Segment Reporting, Policy [Policy Text Block] Entity Public Float Entity Public Float 2012 Equity Incentive Plan [Member] Two Thousand Twelve Equity Incentive Plan [Member] Two Thousand Twelve Equity Incentive Plan [Member] Document Type Document Type ICFR Auditor Attestation indicator ICFR Auditor Attestation Flag Earnings Per Share Reconciliation Effect On Basic Earnings Per Share [Domain] Earnings Per Share Reconciliation Effect On Basic Earnings Per Share [Domain] Earnings Per Share Reconciliation Effect On Basic Earnings Per Share [Domain] Accounts payable and accrued expenses Increase (Decrease) in Accounts Payable and Accrued Liabilities Average daily balance of required reserves at the Federal Reserve Bank Average Daily Required Reserve Balance At Federal Reserve Bank Average Daily Required Reserve Balance At Federal Reserve Bank Schedule of Accumulated Other Comprehensive Income (Loss) Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Significant Unobservable Inputs (Level 3) [Member] Fair Value, Inputs, Level 3 [Member] Leases Lessee, Leases [Policy Text Block] Acquired BOLI policies, Percentage Effective Income Tax Rate Reconciliation BOLI Income Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to change in cash surrender value of acquired bank-owned life insurance policies Available-for-sale Securities, One year through five years, Estimated Fair Value Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five Time Deposits, $250,000 or more Time Deposits, at or Above FDIC Insurance Limit Deferred income tax liabilities, net Deferred Income Tax Liabilities, Net Lease liabilities Deferred Tax Assets, Operating Lease Liabilities Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from operating lease liabilities. Proceeds from bank-owned life insurance ("BOLI") death benefit Proceeds from Life Insurance Policy FHLB Advances, Fixed Rate Federal Home Loan Bank, Advances, Maturities Summary, Fixed Rate Total capital, For Capital Adequacy Purposes, Amount Banking Regulation, Total Risk-Based Capital, Capital Adequacy, Minimum Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Repurchase of common stock Payments for Repurchase of Common Stock Deposits and Borrowed Funds [Abstract] Deposits and Borrowed Funds [Abstract] Deposits and Borrowed Funds [Abstract] Thereafter Lessee, Operating Lease, Liability, to be Paid, after Year Five Borrowings Federal Home Loan Bank Borrowings, Fair Value Disclosure Furniture, Fixtures and Equipment [Member] Furniture and Fixtures [Member] State of principal executive offices location Entity Address, State or Province Federal income tax expense computed at statutory Federal rate, Amount Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount Earnings Per Share Earnings Per Share Reconciliation [Abstract] Financial Asset, Period Past Due [Axis] Financial Asset, Period Past Due [Axis] Subordinated Debentures Subject to Mandatory Redemption [Member] Subordinated Debentures Subject to Mandatory Redemption [Member] Retained earnings Retained Earnings (Accumulated Deficit) Operating Lease, Right-of-Use Asset Right-of-use asset, amount Operating Lease, Right-of-Use Asset INCOME BEFORE EQUITY IN EXCESS OF DISTRIBUTION OVER EARNINGS OF SUBSIDIARY Income Before Equity In Undistributed Overdistributed Earnings Of Subsidiary Income before equity in undistributed (overdistributed) earnings of subsidiary. Public unit deposits Pledged Financial Instruments, Not Separately Reported, Securities for Public Unit Deposits The carrying amount as of the date of the latest financial statement presented of securities which are owned but transferred to serve as collateral for public unit deposits, and for which the transferee does not have the right by contract or custom to sell or re-pledge them to an unrelated party. CASH, CASH EQUIVALENTS, RESTRICTED CASH AND RESTRICTED CASH EQUIVALENTS: Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract] Premises and equipment Deferred Tax Liabilities, Property, Plant and Equipment Income tax payments Income Taxes Paid ACL for loans individually evaluated for impairment Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment Taxable Interest Income, Securities, Operating, Taxable Interest rate swaps, notional amount Derivative Liability, Notional Amount Serviced loans for others, aggregate amount Aggregate amount of loans serviced for others Aggregate amount of loans serviced by the Bank for others. Increases (Decreases) In Taxes Resulting From: Increases (Decreases) In Taxes Abstract Increases (Decreases) in taxes resulting from: Schedule Of Carrying Value Of Securities Pledged As Collateral Schedule Of Carrying Value Of Securities Pledged As Collateral [Table Text Block] Schedule Of Carrying Value Of Securities Pledged As Collateral. Income Taxes Income Tax, Policy [Policy Text Block] Repurchase Agreements, Description of Potential Risks Repurchase Agreements, Securities Lending Transactions, and Repurchase-to-Maturity Transactions Accounted for as Secured Borrowings, Description of Potential Risks Options exercisable at end of year, number of options Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Interest rate swaps, collateral posted Collateral Already Posted, Aggregate Fair Value Stock-based compensation APIC, Share-based Payment Arrangement, Increase for Cost Recognition Summary of Loans Receivable Summary Of Loans Receivable By Category [Table Text Block] Tabular disclosure of the various types of loans receivable and for each the gross carrying value as of the balance sheet date. Certificates of Deposit Due in 2022 Time Deposit Maturities, Year Two Revenue from contracts with customers Revenue from Contract with Customer, Excluding Assessed Tax Advertising and promotional Advertising Expense Impaired loans with no related allowance, Unpaid Principal Balance Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance Securities Investment, Policy [Policy Text Block] Net change in loans receivable Payments for (Proceeds from) Loans and Leases Dividends on unallocated ESOP shares in excess of debt service payments Employee Stock Ownership Plan (ESOP), Dividends Paid to ESOP Correspondent Purchased [Member] One To Four Family Loans Correspondent Purchased [Member] Correspondent purchased loan secured by residential real estate as a single family home or a multi-unit dwelling of two to four units. Business Acquisition [Axis] Business Acquisition [Axis] Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Axis] Forecast [Member] Forecast [Member] Net EPS: Earnings Per Share, Basic and Diluted [Abstract] Voluntary Filer indicator Entity Voluntary Filers Merger-related expenses incurred Business Combination, Acquisition Related Costs Total capital, To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio Banking Regulation, Total Risk-Based Capital Ratio, Well Capitalized, Minimum PCI loans, contractually required payments receivable at acquisition Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period, Contractually Required Payments Receivable at Acquisition Recorded Investment in Loans, Past Due Financing Receivable, Past Due [Table Text Block] Preferred stock, shares issued Preferred Stock, Shares Issued Contractual term of stock options Share-based Compensation Arrangement By Share-based Payment Award, Options Outstanding Contractual Term Contractual term of stock options. Recorded Investment in Classified Loans Financing Receivable Credit Quality Indicators [Table Text Block] Tier 1 capital, To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio Banking Regulation, Tier One Risk-Based Capital Ratio, Well Capitalized, Minimum Business Combinations [Abstract] Business Combinations [Abstract] Originated [Member] One To Four Family Loans Originated [Member] One To Four Family Loans Originated [Member] Commercial Segment [Member] Commercial Portfolio Segment [Member] Loans receivable, measurement input Loans Receivable, Measurement Input Value of input used by financial institution to measure loans receivable at fair value Options exercisable at end of year, weighted average remaining contractual life (in years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term FHLB advances FHLB Advances Amount Advances from Federal Home Loan Banks Financial Asset, Period Past Due [Domain] Financial Asset, Period Past Due [Domain] Corporate Reorganization [Member] Corporate Reorganization [Member] Corporate Reorganization [Member] PCI Loans [Member] Purchased Credit Impaired Loans [Member] Purchased Credit Impaired Loans [Member] Schedule Of Earnings Per Share, Basic And Diluted Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Future minimum rental commitments, total Operating Leases, Future Minimum Payments Due Impaired loans with related allowance, Interest Income Recognized Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method Expiration date for FHLB line of credit Line of Credit Facility, Expiration Date Income taxes payable/receivable, net Increase (Decrease) in Income Taxes Payable, Net of Income Taxes Receivable Loans receivable, allowance for credit losses ACL Loans and Leases Receivable, Allowance Schedule Of Fair Value Assets Measured On A Recurring Basis Fair Value, Assets Measured on Recurring Basis [Table Text Block] FHLB line of credit, outstanding balance Long-term Line of Credit Net income tax benefit, low income housing partnerships Net Income Tax Benefit, Low Income Housing Partnerships Amount of net income tax benefit recognized related to low income housing partnerships Net cash provided by operating activities Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Bulk Purchased [Member] One To Four Family Loans Bulk Purchased [Member] Bulk purchased loan secured by residential real estate as a single family home or a multi-unit dwelling of two to four units. Financing receivable, nonaccrual loans Financing Receivable, Nonaccrual Entity Central Index Key Entity Central Index Key Portion of compensation expense related to the ESOP attributable to changes in Company stock price Portion Of Compensation Expense Related To ESOP Attributable To Changes In Company Stock Price Portion Of Compensation Expense Related To ESOP Attributable To Changes In Company Stock Price Financing Receivable, Past Due [Table] Financing Receivable, Past Due [Table] Financial Asset, 30 to 89 Days Past Due [Member] Financing Receivables, 30 to 89 Days Past Due [Member] Financing receivables that are more than 29 days past due but fewer than 90 days past due. Consumer Segment [Member] Consumer Portfolio Segment [Member] Borrowed Funds Borrowed Funds [Policy Text Block] Borrowed Funds [Policy Text Block] FHLB stock Investment in Federal Home Loan Bank Stock, Fair Value Disclosure Unrealized loss on interest rate swaps Deferred Tax Assets, Derivative Instruments Available-for-sale Securities, Amortized Cost Debt Securities, Available-for-sale, Amortized Cost Fair value of loans acquired Business Combination, Acquired Receivable, Fair Value Available-for-sale Securities, Gross Unrealized Gains Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] ESOP related expenses, net, Amount ESOP Related Expenses Net ESOP related expenses, net. Income Statement Location [Axis] Income Statement Location [Axis] Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding NON-INTEREST INCOME: Noninterest Income [Abstract] CBLR, For Capital Adequacy Purposes, Ratio Community Bank Leverage Ratio Capital Required for Capital Adequacy to Average Assets Ratio of minimum Community Bank Leverage Ratio capital to average assets required for capital adequacy as defined by regulatory framework Current, Federal Current Federal Tax Expense (Benefit) Amortization of intangible assets Core Deposit and Other Intangibles, Amortization Amortization of Intangible Assets Interest rate swaps, fair value Derivative, Fair Value, Net Unearned compensation, Employee Stock Ownership Plan ("ESOP") Unearned compensation - ESOP Unearned ESOP Shares Cost Cost of unearned shares that qualify as permanent equity that are held by an employee stock ownership plan (ESOP) Fair value of unreleased ESOP shares Employee Stock Ownership Plan (ESOP), Deferred Shares, Fair Value Purchase/participate adjustable-rate Commitments Outstanding To Purchase Adjustable Rate Commitments to purchase/participate adjustable rate loans. Low income housing tax credits, net, Percentage Effective Income Tax Rate Reconciliation, Tax Credit, Percent Number of Stores Number of Stores Scenario [Axis] Scenario [Axis] Federal Home Loan Bank Stock Federal Home Loan Bank Stock [Policy Text Block] Federal Home Loan Bank Stock [Policy Text Block] Tier 1 leverage, Actual Ratio Banking Regulation, Tier One Leverage Capital Ratio, Actual Reclassification of certain tax effects related to adopting Accounting Standards Update ("ASU") 2018-02 Reclassification of certain income tax effects related to adoption of ASU 2018-02 Tax Cuts and Jobs Act, Reclassification from AOCI to Retained Earnings, Tax Effect Title of security class Title of 12(b) Security Core Deposit and Other Intangibles Balance Core Deposit and Other Intangibles Balance Finite-Lived Intangible Assets, Net Operating lease liabilities obtained Operating Lease Liability Obtained Amount of increase in lease liability recognized Income taxes payable, net Accrued Income Taxes, Current Unrealized gains (losses) on AFS securities arising during the period, net of taxes of $(4,359), $(3,468), and $2,499 Other comprehensive income (loss), before reclassifications - AFS Securities OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax Lack of Marketability [Member] Measurement Input, Discount for Lack of Marketability [Member] Common stock committed to be released for allocation - ESOP Employee Stock Ownership Plan (ESOP), Compensation Expense PROVISION FOR CREDIT LOSSES Provision for credit losses Provision for Loan and Lease Losses Total interest expense INTEREST EXPENSE Interest Expense Schedule Of Income Tax Expense Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Schedule Of Estimated Fair Value And Gross Unrealized Losses Of Securities In Continuous Unrealized Loss Position Unrealized Gain (Loss) on Investments [Table Text Block] Product and Service [Axis] Product and Service [Axis] Loan-to-value ratio securing commercial construction loans, maximum Loan to Value Ratio for Securing Commercial Construction Loans Maximum For commercial construction loans, the maximum acceptable loan to value ratio Proceeds from borrowings Proceeds from FHLBank Borrowings, Financing Activities Unrecognized total future compensation cost weighted average recognition period Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Other Comprehensive Income Components [Domain] Other Comprehensive Income Location [Domain] Net payment from subsidiary related to restricted stock awards Proceeds, Issuance of Shares, Share-based Payment Arrangement, Excluding Option Exercised Net income available to common stockholders Net Income (Loss) Available to Common Stockholders, Basic Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] ACL Beginning Balance Ending Balance ACL Financing Receivable, Allowance for Credit Loss Gain on sale of AFS securities Debt Securities, Available-for-sale, Realized Gain Debt Instrument [Axis] Debt Instrument [Axis] Summary Of Quarterly Data Quarterly Financial Information [Table Text Block] Nonqualified Stock Options [Member] Nonqualified Stock Options [Member] Nonqualified Stock Options [Member] Interest rate swaps Derivative Liability Adjustments to reconcile net income to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] Variable lease expense Variable Lease, Cost State taxes, net of Federal tax effect, Amount Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount Schedule of Investments [Line Items] Schedule of Investments [Line Items] Income taxes receivable, net Income Taxes Receivable Number of Contracts Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts NON-INTEREST EXPENSE: Noninterest Expense [Abstract] Standby letters of credit outstanding Letters of Credit Outstanding, Amount Shares Held In Employee Stock Ownership Plan, Allocated Shares Held In Employee Stock Ownership Plan Allocated Number of allocated shares held by the Employee Stock Ownership Plan at balance sheet date. Allocated shares are shares that have been assigned to individual participant accounts based on a known formula. Impaired Loans by Class Impaired Financing Receivables [Table Text Block] Total capital, For Capital Adequacy Purposes, Ratio Banking Regulation, Total Risk-Based Capital Ratio, Capital Adequacy, Minimum Change in advance payments by borrowers for taxes and insurance Increase (Decrease) in Advance Payments by Borrowers for Taxes and Insurance Employee Stock Ownership Plan (ESOP) Disclosures [Line Items] Employee Stock Ownership Plan (ESOP) Disclosures [Line Items] Certificates of Deposit Due in 2025 Time Deposit Maturities, Year Five Estimated Fair Value [Member] Estimate of Fair Value Measurement [Member] Deposits Deposits, Domestic Vesting period Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period 2024 Finite-Lived Intangible Asset, Expected Amortization, Year Four FHLB Advances, Interest Rate Weighted average contractual interest rate on FHLB advances Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Interest Rate at Period End Impairment losses from the forfeiture or ineligibility of tax credits or other circumstances, amount Affordable Housing Project Investment, Write-down, Amount Payment of FHLB prepayment penalties Payments of Debt Restructuring Costs Occupancy, net Occupancy, Net Percentage of ESOP shares participant may diversify once age requirement is met Percentage Of Employee Stock Ownership Plan Shares Diversified Percentage of Employee Stock Ownership Plan shares diversified MBS [Member] Residential Mortgage Backed Securities [Member] Financing Receivable, Allowance for Credit Loss [Line Items] Financing Receivable, Allowance for Credit Loss [Line Items] Comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Preferred stock, par value Preferred Stock, Par or Stated Value Per Share GSE Debentures [Member] US Government-sponsored Enterprises Debt Securities [Member] Documents Incorporated by Reference [Text Block] Documents Incorporated by Reference [Text Block] Differences Between Effective Rates And Statutory Federal Income Tax Rate Computed On Income Before Income Tax Expense Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Telephone number - Area code City Area Code Non-PCI Loans [Member] Non-Purchased Credit Impaired Loans [Member] Non-Purchased Credit Impaired Loans [Member] Period End Date Document Period End Date Replacement FHLB Advances [Member] Replacement FHLB Advances [Member] Replacement FHLB Advances [Member] Commitments outstanding to originate, purchase, or participate in loans Commitments Outstanding To Originate And Purchase Loans Commitments outstanding to originate and purchase loans. Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Amount reclassified from AOCI Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax Tier 1 capital, Actual Ratio Banking Regulation, Tier One Risk-Based Capital Ratio, Actual Loans receivable, net (allowance for credit losses ("ACL") of $31,527 and $9,226) Loans receivable Loans receivable, net Loans and Leases Receivable, Net Amount Proceeds from calls, maturities and principal reductions of HTM securities Proceeds from Maturities, Prepayments and Calls of Held-to-maturity Securities Stock-based compensation Share-based Payment Arrangement, Noncash Expense Repurchase of common stock Stock Repurchased During Period, Value Commercial and Industrial [Member] Commercial Loan [Member] Pre-Restructured Outstanding Financing Receivable, Troubled Debt Restructuring, Premodification Purchase of FHLB stock Payments to Acquire Federal Home Loan Bank Stock Cover [Abstract] Cover [Abstract] Measurement Input Type [Axis] Measurement Input Type [Axis] Capital City Bancshares, Inc. [Member] Capital City Bancshares [Member] Capital City Bancshares [Member] Other comprehensive income (loss), before reclassifications Other Comprehensive Income (Loss), before Reclassifications, Net of Tax Schedule Of Borrowed Funds [Table] Schedule Of Borrowed Funds [Table] Schedule Of Borrowed Funds [Table] Summary Of Shares Held In The ESOP Trust Employee Stock Ownership Plan (ESOP) Disclosures [Table Text Block] Leases Lessee, Operating Leases [Text Block] Interest rate swaps, remaining term to maturity Derivative, Average Remaining Maturity Debt Securities [Member] Debt Securities [Member] Amortization and accretion of premiums and discounts on securities Accretion (Amortization) of Discounts and Premiums, Investments Equity Components [Axis] Equity Components [Axis] Changes in unrealized gains (losses) on cash flow hedges, net of taxes of $4,875, $10,394, and $(2,785) Other comprehensive income (loss) - Cash Flow Hedges Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax Total non-interest income NON-INTEREST INCOME Noninterest Income Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Minimum [Member] Minimum [Member] Gross deferred income tax assets Deferred Tax Assets, Gross PCI loans, cash flows expected to be collected at acquisition Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period, Cash Flows Expected to be Collected at Acquisition Tier 1 leverage, To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount Banking Regulation, Tier One Leverage Capital, Well Capitalized, Minimum Interactive data current reporting status indicator Entity Interactive Data Current CASH FLOWS FROM OPERATING ACTIVITIES: Net Cash Provided by (Used in) Operating Activities [Abstract] Recoveries Financing Receivable, Allowance for Credit Loss, Recovery Proceeds from calls, maturities and principal reductions of AFS securities Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-sale Stock-based Compensation Share-based Payment Arrangement [Policy Text Block] Impaired loans, Unpaid Principal Balance Impaired Financing Receivable, Unpaid Principal Balance Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Gross deferred income tax liabilities Deferred Tax Liabilities, Gross In-Store Banking Offices [Member] In Store Banking Offices [Member] In-Store Banking Offices [Member] Deferred tax liability remeasurement, net, Amount Effective Income Tax Rate Reconciliation, Tax Cuts and Jobs Act, Amount Investment securities Interest Income, Debt Securities, Operating Total non-interest expense Noninterest Expense Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] Impaired loans, Recorded Investment Impaired Financing Receivable, Recorded Investment Total securities pledged as collateral Pledged Financial Instruments, Not Separately Reported, Securities Total future minimum lease payments Lessee, Operating Lease, Liability, to be Paid Other Deferred Tax Assets, Other Deferred income tax liabilities: Components of Deferred Tax Liabilities [Abstract] Investment In affordable housing limited partnerships Investment In Affordable Housing Limited Partnerships The Bank's investment in low income housing partnerships Debt service coverage ratio for commercial real estate loans, minimum Debt Service Coverage Ratio For Commercial Real Estate Loans Minimum For commercial real estate loans, the minimum acceptable debt service coverage ratio. FHLB line of credit available for leverage strategy, maximum Federal Home Loan Bank, Advances, General Debt Obligations, Maximum Amount Available Information technology and related expense Communications and Information Technology Available-for-sale Securities, One year or less, Estimated Fair Value Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, Year One Financing Receivable, Impaired [Line Items] Financing Receivable, Impaired [Line Items] Proceeds from the redemption of FHLB stock Proceeds from Sale of Federal Home Loan Bank Stock Transition Report indicator Document Transition Report Available-for-sale Securities, Continuous Unrealized Loss Position, Equal to or Greater Than 12 Months, Unrealized Losses Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Impaired loans, Interest Income Recognized Impaired Financing Receivable, Interest Income, Accrual Method Significant Other Observable Inputs (Level 2) [Member] Fair Value, Inputs, Level 2 [Member] Financing Receivable, Troubled Debt Restructuring [Table] Financing Receivable, Troubled Debt Restructuring [Table] Core Deposit and Other Intangibles, Purchase Accounting Adjustments Finite-Lived Intangible Assets, Purchase Accounting Adjustments Accounting Standards Update 2016-13 [Member] Accounting Standards Update 2016-13 [Member] Cumulative Effect, Period of Adoption [Axis] Cumulative Effect, Period of Adoption [Axis] Deferred income tax assets: Components of Deferred Tax Assets [Abstract] Basic earnings per share ("EPS") Basic Basic EPS Earnings Per Share, Basic Unrealized gains (losses) on AFS securities arising during the period, tax OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment, Tax Commission file number Entity File Number Operating leases, weighted average remaining lease term Operating Lease, Weighted Average Remaining Lease Term Other intangible assets recognized upon acquisition of CCB Core Deposit and Other Intangibles, Acquired During Period Finite-lived Intangible Assets Acquired Advance payments by borrowers for taxes and insurance Advance Payments by Borrowers for Taxes and Insurance Investment Holdings [Table] Investment Holdings [Table] Compensation expense Share-based Payment Arrangement, Expense Deferred tax liability remeasurement, net, Percentage Effective Income Tax Rate Reconciliation, Tax Cuts and Jobs Act, Percent Affordable housing tax credits commitment, year to be paid Affordable Housing Tax Credits Commitment, Year to be Paid 2000 Stock Option Plan [Member] Two Thousand Stock Option Plan [Member] Two Thousand Stock Option Plan [Member] Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] Annual Report indicator Document Annual Report Insurance Commissions Insurance Commissions and Fees Certificates of Deposit Due Thereafter Time Deposit Maturities, after Year Five Proportional amortization expense, amount Amortization Method Qualified Affordable Housing Project Investments, Amortization Deposits Deposits, Fair Value Disclosure Employee Stock Ownership Plan (ESOP), Shares in ESOP [Abstract] Employee Stock Ownership Plan (ESOP), Shares in ESOP [Abstract] Selected Quarterly Financial Information [Abstract] Selected Quarterly Financial Information [Abstract] Amount reclassified from AOCI - AFS Securities Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI for Write-down of Securities, Net of Tax FHLB Advances [Member] Federal Home Loan Bank Advances [Member] CASH FLOWS FROM INVESTING ACTIVITIES: Net Cash Provided by (Used in) Investing Activities [Abstract] Revenue from Contract with Customer [Table] Revenue from External Customers by Products and Services [Table] Proceeds from the redemption of common equity securities related to the redemption of junior subordinated debentures Proceeds from Sale of Other Investments Other Deferred Tax Liabilities, Other Liquidation account balance Liquidation Account The amount equal to the former mutual holding company's ownership interest in the retained earnings of the former company, as determined as of a specific date, for the benefit of certain depositors of the Bank. Other non-interest income Noninterest Income, Other Banking Regulation, Tier One Leverage Capital [Abstract] Banking Regulation, Tier One Leverage Capital [Abstract] Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Current income tax expense Current Federal, State and Local, Tax Expense (Benefit) TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY Liabilities and Equity Accounting Standards Update 2014-09 [Member] Accounting Standards Update 2014-09 [Member] Accumulated other comprehensive (loss) income ("AOCI"), net of tax Beginning Balance Ending Balance AOCI, net of tax Accumulated Other Comprehensive Income (Loss), Net of Tax Income Taxes Income Tax Disclosure [Text Block] Changes in unrealized gains (losses) on cash flow hedges, tax Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax Portion at Fair Value Measurement [Member] Portion at Fair Value Measurement [Member] Operating lease expense Operating Lease, Cost Antidilutive stock options, excluded from the diluted average common shares outstanding calculation Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Tier 1 capital, To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount Banking Regulation, Tier One Risk-Based Capital, Well Capitalized, Minimum Investments in Affordable Housing Projects [Abstract] Investments in Affordable Housing Projects [Abstract] Weighted average credit score Weighted Average Credit Score Weighted Average Credit Score Equity Component [Domain] Equity Component [Domain] Other comprehensive income (loss) - AFS Securities OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment and Tax ESOP compensation Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Postretirement Benefits Premises and equipment, net Property, plant and equipment, net Property, Plant and Equipment, Net IRS identification number Entity Tax Identification Number Lessee, Lease, Description [Table] Lessee, Lease, Description [Table] Low Income Housing Partnerships Low Income Housing Partnerships, Policy [Policy Text Block] Disclosure of accounting policy for low income housing partnerships Stock-Based Compensation Share-based Payment Arrangement [Text Block] NET INCOME Net income Net income Net Income (Loss) Attributable to Parent Changes in: Increase (Decrease) in Operating Capital [Abstract] Summary Of Significant Accounting Policies Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block] Current Fiscal Year End Date Current Fiscal Year End Date Deferred income tax expense Deferred Federal, State and Local, Tax Expense (Benefit) Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Loans individually evaluated for impairment Loans receivable Loans Receivable, Fair Value Disclosure Capitol Federal Financial Inc [Member] Parent Company [Member] Liabilities: Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract] Deposit service fees, type of revenue Revenue, Product and Service [Extensible List] ACL for loans collectively evaluated for impairment Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment Financing Receivable, Credit Quality Indicator [Table] Financing Receivable, Credit Quality Indicator [Table] Low income housing partnerships Deferred Tax Assets, Investments SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION: Supplemental Cash Flow Information [Abstract] Principal collected on note receivable from ESOP Proceeds from Collection of Notes Receivable Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Tier 1 leverage, To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio Banking Regulation, Tier One Leverage Capital Ratio, Well Capitalized, Minimum Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Long-Lived Tangible Asset [Domain] Long-Lived Tangible Asset [Domain] Reserves on unfunded commitments Off-Balance Sheet, Credit Loss, Liability Borrowings FHLB borrowings, Amount FHLB advances, outstanding balance Long-term Federal Home Loan Bank Advances Cash dividends to stockholders Dividends, Cash FHLB Advances Due in 2021 Federal Home Loan Bank, Advance, Maturity, Year One Tier 1 leverage, For Capital Adequacy Purposes, Ratio Banking Regulation, Tier One Leverage Capital Ratio, Capital Adequacy, Minimum Summary Of The Carrying Value Of Banking Premises And Equipment Property, Plant and Equipment [Table Text Block] Total ESOP shares Employee Stock Ownership Plan (ESOP), Shares in ESOP Available-for-sale Securities, Continuous Unrealized Loss Position, Less Than 12 Months, Unrealized Losses Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Accumulated depreciation, property, plant and equipment Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Schedule of Future Minimum Payments for Operating Leases Lessee, Operating Lease, Liability, Maturity [Table Text Block] Number of shares acquired by ESOP trust Number Shares Acquired By Employee Stock Ownership Plan Number of shares acquired by employee stock ownership plan. FHLB Advances Schedule of Federal Home Loan Bank, Advances, by Branch of FHLB Bank [Table Text Block] Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Other, Amount Effective Income Tax Rate Reconciliation, Other Adjustments, Amount Doubtful [Member] Doubtful [Member] Employee Stock Ownership Plan Employee Stock Ownership Plan (ESOP), Policy [Policy Text Block] Total basic average common shares outstanding Average number of basic shares outstanding Weighted Average Number of Shares Outstanding, Basic Common stock issued Common stock issued for acquisition Stock Issued Schedule of Future Minimum Rental Commitments Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Carrying Amount [Member] Reported Value Measurement [Member] Leverage Strategy [Member] Leverage Strategy [Member] Leverage Strategy [Member] Plan Name [Domain] Plan Name [Domain] Well-known Seasoned Issuer indicator Entity Well-known Seasoned Issuer Revenue Recognition Revenue from Contract with Customer [Text Block] Schedule Of Statements Of Income Condensed Income Statement [Table Text Block] Operating lease right-of-use assets obtained Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Required age of participant in order to diversify ESOP shares, years Age Period Of Diversified Employee Stock Ownership Plan Shares Age at which employee ESOP participants may begin to diversify their ESOP shares into other investments. Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] INCOME TAX EXPENSE Income tax expense INCOME TAX EXPENSE (BENEFIT) Income Tax Expense (Benefit) 2024 Operating Leases, Future Minimum Payments, Due in Five Years Beginning of year End of year Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Premises and Equipment Property, Plant and Equipment, Policy [Policy Text Block] Maturity of Borrowed Funds and Certificates of Deposit Schedule of Maturities of Long-term Debt [Table Text Block] Telephone number Local Phone Number Cumulative Effect, Period of Adoption [Domain] Cumulative Effect, Period of Adoption [Domain] Unrealized gains on securities reclassified from HTM to AFS during the period, tax OCI, Debt Securities, Available-for-Sale, Transfer from Held-to-Maturity, Gain (Loss), before Adjustment, Tax Other [Member] Consumer Loan [Member] CASH AND CASH EQUIVALENTS: Cash and Cash Equivalents, at Carrying Value [Abstract] Unadvanced lines of credit Unadvanced Lines Of Credit Unadvanced Lines Of Credit Unearned Compensation ESOP [Member] Employee Stock Ownership Plan [Member] A plan where shares of company stock are allocated to qualified employees based on the proportion of their qualifying compensation to total qualifying compensation. Funds are borrowed by the ESOP from the Company to purchase the Company's common stock and repaid from the Bank's contributions and dividends paid on unallocated ESOP shares. The shares pledged as collateral are reported as a reduction of stockholders' equity at cost. As ESOP shares are committed to be released from collateral each quarter, the Company records compensation expense based on the average market price of the Company's stock during the quarter. Additionally, the shares become outstanding for earnings per share ("EPS") computations once they are committed to be released. ESOP activity Stock Issued During Period, Value, Employee Stock Ownership Plan Other assets, net Other assets Increase (Decrease) in Other Operating Assets Stock options exercised Stock Issued During Period, Value, Stock Options Exercised Borrowings Interest Expense, Borrowings Amount reclassified from AOCI, deferred income taxes Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax Award Type [Axis] Award Type [Axis] Originate adjustable-rate Loans and Leases Receivable, Commitments, Variable Rates Class of Financing Receivable [Axis] Class of Financing Receivable [Axis] Repurchase agreements Pledged Financial Instruments, Not Separately Reported, Securities for Repurchase Agreements Revaluation of net deferred tax liability Tax Cuts and Jobs Act, Change in Tax Rate, Deferred Tax Liability, Income Tax Benefit Retained Earnings [Member] Retained Earnings [Member] Preferred stock, shares outstanding Preferred Stock, Shares Outstanding Measurement Basis [Axis] Measurement Basis [Axis] Debt, Type [Domain] Short-term Debt, Type [Domain] Charge-offs Financing Receivable, Allowance for Credit Loss, Writeoff Impaired loans with no related allowance, Recorded Investment Impaired Financing Receivable, with No Related Allowance, Recorded Investment Net cash (used in) provided by investing activities Net cash provided by investing activities Net Cash Provided by (Used in) Investing Activities Options outstanding at end of year, weighted average remaining contractual life (in years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Share-based Payment Arrangement, Noncash Expense [Abstract] Share-based Payment Arrangement, Noncash Expense [Abstract] Share-based Compensation Arrangements by Share-based Payment Award, Award Type and Plan Name [Domain] Award Type [Domain] Allowance for Credit Losses Financing Receivable, Allowance for Credit Loss [Table Text Block] Options exercisable at end of year, weighted average exercise price Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Financing receivable, total recorded investment Financing receivable, total recorded investment Loans and Leases Receivable, Net of Deferred Income Premises And Equipment, Net Property, Plant and Equipment Disclosure [Text Block] Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Allowance for Credit Losses Loans and Leases Receivable, Allowance for Loan Losses Policy [Policy Text Block] Earnings Per Share Earnings Per Share [Text Block] INTEREST EXPENSE: Interest Expense [Abstract] Federal corporate income tax rate Federal income tax expense computed at statutory Federal rate, Percentage Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Summary Of Significant Accounting Policies [Table] Summary Of Significant Accounting Policies [Table] Summary Of Significant Accounting Policies [Table] Total capital, To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount Banking Regulation, Total Risk-Based Capital, Well Capitalized, Minimum CBLR, Actual Amount Community Bank Leverage Ratio Capital Amount of Community Bank Leverage Ratio capital as defined by regulatory framework Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Weighted average rate of repurchase agreements Assets Sold under Agreements to Repurchase, Interest Rate Statement of Financial Position [Abstract] Statement of Financial Position [Abstract]