Entity Central Index Key Financing receivable recorded investment thirty one to sixty days past due. Financing receivable recorded investment sixty one to eighty nine days past due. Financing receivable recorded investment past due and nonaccrual. Financing receivable recorded investment purchased credit impaired accruing. Financing receivable recorded investment purchased credit impaired nonaccrual. Amount of increase (decrease) in accumulated other comprehensive income (AOCI) for reclassification to retained earnings of tax effect from remeasurement of deferred tax pursuant to Tax Cuts and Jobs Act. Cover [Abstract] Document Type Document Type Amendment Flag Amendment Flag Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Trading Symbol Trading Symbol Entity Registrant Name Entity Registrant Name Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Entity Small Business Entity Small Business Entity Emerging Growth Company Entity Emerging Growth Company Entity Current Reporting Status Entity Current Reporting Status Entity Shell Company Entity Shell Company Entity Common Stock, Shares Outstanding Entity Common Stock Shares Outstanding Entity File Number Entity File Number Entity Tax Identification Number Entity Tax Identification Number Entity Address, Address Line One Entity Address Address Line1 Entity Address, City or Town Entity Address City Or Town Entity Address, State or Province Entity Address State Or Province Entity Address, Postal Zip Code Entity Address Postal Zip Code City Area Code City Area Code Local Phone Number Local Phone Number Entity Interactive Data Current Entity Interactive Data Current Title of 12(b) Security Security12b Title Security Exchange Name Security Exchange Name Entity Incorporation, State or Country Code Entity Incorporation State Country Code Document Quarterly Report Document Quarterly Report Document Transition Report Document Transition Report Statement Of Financial Position [Abstract] ASSETS Assets [Abstract] Cash and due from banks Cash And Due From Banks Interest-bearing deposits with other institutions Interest Bearing Deposits In Banks Total cash and cash equivalents Cash And Cash Equivalents At Carrying Value Investment securities available for sale, at fair value Available For Sale Securities Debt Securities Loans receivable (net of allowance for loan losses of $13,179 and $12,630) Loans And Leases Receivable Net Reported Amount Regulatory stock, at cost Federal Home Loan Bank Stock Premises and equipment, net Property Plant And Equipment Net Bank-owned life insurance Bank Owned Life Insurance Foreclosed real estate Real Estate Acquired Through Foreclosure Intangible assets, net Intangible Assets Net Excluding Goodwill Goodwill Goodwill Deferred income taxes Deferred Tax Assets Liabilities Net Other assets Other Assets TOTAL ASSETS Assets LIABILITIES Liabilities [Abstract] Deposits Deposits Short-term borrowings Short Term Borrowings Other borrowings Other Borrowings Advances by borrowers for taxes and insurance Advance Payments By Borrowers For Taxes And Insurance Other liabilities Other Liabilities TOTAL LIABILITIES Liabilities STOCKHOLDERS’ EQUITY Stockholders Equity [Abstract] Preferred Stock ($0.01 par value; 10,000,000 shares authorized, none issued) Preferred Stock Value Common stock ($0.01 par value; 40,000,000 shares authorized, 18,133,095 issued; 11,105,887 and 11,321,417 outstanding at March 31, 2020 and September 30, 2019, respectively) Common Stock Value Additional paid in capital Additional Paid In Capital Common Stock Unallocated common stock held by the Employee Stock Ownership Plan (ESOP) Unearned E S O P Shares Retained earnings Retained Earnings Accumulated Deficit Treasury stock, at cost; 7,027,208 and 6,811,678 shares outstanding at March 31, 2020 and September 30, 2019, respectively Treasury Stock Value Accumulated other comprehensive income (loss) Accumulated Other Comprehensive Income Loss Net Of Tax TOTAL STOCKHOLDERS’ EQUITY Stockholders Equity TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY Liabilities And Stockholders Equity Allowance for loan losses Loans And Leases Receivable Allowance Preferred Stock, par value Preferred Stock Par Or Stated Value Per Share Preferred Stock, shares authorized Preferred Stock Shares Authorized Preferred Stock, shares issued Preferred Stock Shares Issued Common stock, par value Common Stock Par Or Stated Value Per Share Common stock, shares authorized Common Stock Shares Authorized Common stock, shares issued Common Stock Shares Issued Common stock, shares outstanding Common Stock Shares Outstanding Treasury stock, shares outstanding Treasury Stock Shares Service fees on deposit accounts. Services charges and fees on loans. Trust and investment fees. Income Statement [Abstract] INTEREST INCOME Interest And Dividend Income Operating [Abstract] Loans receivable, including fees Interest And Fee Income Loans And Leases Investment securities: Interest And Dividend Income Securities By Taxable Status [Abstract] Taxable Interest Income Securities Taxable Exempt from federal income tax Interest Income Securities Tax Exempt Other investment income Other Interest And Dividend Income Total interest income Interest And Dividend Income Operating INTEREST EXPENSE Interest Expense [Abstract] Deposits Interest Expense Deposits Short-term borrowings Interest Expense Short Term Borrowings Other borrowings Interest Expense Other Total interest expense Interest Expense NET INTEREST INCOME Interest Income Expense Net Provision for loan losses Provision For Loan And Lease Losses NET INTEREST INCOME AFTER PROVISION FOR LOAN LOSSES Interest Income Expense After Provision For Loan Loss NONINTEREST INCOME Noninterest Income [Abstract] Service fees on deposit accounts Service Fees On Deposit Accounts Services charges and fees on loans Services Charges And Fees On Loans Realized and unrealized gain (loss) on equity securities Equity Securities Fv Ni Gain Loss Trust and investment fees Trust And Investment Fees Gain on sale of investment securities available for sale, net Debt Securities Available For Sale Gain Loss Gain on sale of loans, net Gain Loss On Sales Of Loans Net Earnings on Bank-owned life insurance Bank Owned Life Insurance Income Insurance commissions Insurance Commissions And Fees Other Noninterest Income Other Operating Income Total noninterest income Noninterest Income NONINTEREST EXPENSE Noninterest Expense [Abstract] Compensation and employee benefits Labor And Related Expense Occupancy and equipment Occupancy Net Professional fees Professional Fees Data processing Information Technology And Data Processing Advertising Advertising Expense Federal Deposit Insurance Corporation (FDIC) premiums Federal Deposit Insurance Corporation Premium Expense Loss (gain) on foreclosed real estate Gains Losses On Sales Of Other Real Estate Amortization of intangible assets Amortization Of Intangible Assets Other Other Noninterest Expense Total noninterest expense Noninterest Expense Income before income taxes Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest Income taxes Income Tax Expense Benefit NET INCOME Net Income Loss Earnings per share Earnings Per Share [Abstract] Basic Earnings Per Share Basic Diluted Earnings Per Share Diluted Dividends per share Common Stock Dividends Per Share Declared Statement Of Income And Comprehensive Income [Abstract] Net income Other comprehensive income Other Comprehensive Income Loss Net Of Tax Period Increase Decrease [Abstract] Investment securities available for sale: Other Comprehensive Income Available For Sale Securities Adjustment Net Of Tax Period Increase Decrease [Abstract] Unrealized holding gain Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax Tax effect Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax Reclassification of gains recognized in net income Other Comprehensive Income Loss Reclassification Adjustment From A O C I For Sale Of Securities Before Tax Tax effect Other Comprehensive Income Loss Reclassification Adjustment From A O C I For Sale Of Securities Tax Net of tax amount Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent Derivative and hedging activities adjustments: Other Comprehensive Income Derivatives Qualifying As Hedges Net Of Tax Period Increase Decrease [Abstract] Changes in unrealized holding losses on derivatives included in net income Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Before Tax Tax effect Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax Reclassification adjustment for losses (gains) on derivatives included in net income Other Comprehensive Income Loss Reclassification Adjustment From A O C I On Derivatives Before Tax Tax effect Other Comprehensive Income Loss Reclassification Adjustment From A O C I On Derivatives Tax Net of tax amount Other Comprehensive Income Derivatives Qualifying As Hedges Net Of Tax Portion Attributable To Parent Total other comprehensive income Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent Comprehensive income Comprehensive Income Net Of Tax Reclassification of equity investment securities shares. Reclassification of equity investment securities value. Allocation of treasury shares incentive plan. Statement Of Stockholders Equity [Abstract] Statement [Table] Statement [Table] Equity Components Statement Equity Components [Axis] Equity Component Equity Component [Domain] Common Stock [Member] Common Stock [Member] Additional Paid-In Capital [Member] Additional Paid In Capital [Member] Unallocated common stock held by the ESOP. Unallocated Common Stock Held by the ESOP [Member] Unallocated Common Stock Held By Esop [Member] Retained Earnings [Member] Retained Earnings [Member] Treasury Stock [Member] Treasury Stock [Member] Accumulated Other Comprehensive Income (Loss) [Member] Accumulated Other Comprehensive Income [Member] Adjustments for New Accounting Pronouncements Adjustments For New Accounting Pronouncements [Axis] Type of Adoption Type Of Adoption [Member] ASU 2016-02 [Member] Accounting Standards Update201602 [Member] Statement [Line Items] Statement [Line Items] Beginning Balance Beginning Balance, Shares Other comprehensive income (loss) Cash dividends declared ($0.10 and $0.20 for 3 and 6 month ended Mar. 31, 2019 and $0.11 and $0.22 for 3 and 6 months ended Mar. 31, 2020 per share) Dividends Common Stock Cash Change in accounting principal for adoption of ASU Cumulative Effect On Retained Earnings Net Of Tax1 Stock based compensation Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value Allocation of ESOP stock Amortization Of E S O P Award Allocation of treasury shares to incentive plan Allocation Of Treasury Shares Incentive Plan Allocation of treasury shares incentive plan shares. Allocation of treasury shares to incentive plan, Shares Allocation Of Treasury Shares Incentive Plan Shares Reclassification of equity investment securities Reclassification Of Equity Investment Securities Value Reclassification of equity investment securities, Shares Reclassification Of Equity Investment Securities Shares Purchase of common stock Stock Repurchased During Period Value Purchase of common stock, Shares Stock Repurchased During Period Shares Ending Balance Ending Balance, Shares Cash dividends declared, per share Gain loss on sale of investment securities net. Payments for origination of residential real estate loans for sale. Proceeds from sale of residential real estate loans. Amortization of right of use asset. Maturities of certificates of deposit. Increase (decrease) in advances by borrowers for taxes and insurance. Noncash initial recognition of operating right-of-use asset. Noncash initial recognition of operating lease liability. Noncash unrealized holding gain (loss). Statement Of Cash Flows [Abstract] OPERATING ACTIVITIES Net Cash Provided By Used In Operating Activities [Abstract] Net income Profit Loss 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] Provision for depreciation and amortization Depreciation Depletion And Amortization Amortization and accretion of discounts and premiums, net Accretion Amortization Of Discounts And Premiums Investments Net gain on sale of investment securities Gain Loss On Sale Of Investment Securities Net Realized and unrealized loss (gain) on equity securities Gain on sale of loans, net Origination of residential real estate loans for sale Payments For Origination Of Residential Real Estate Loans For Sale Proceeds on sale of residential real estate loans Proceeds From Sale Of Residential Real Estate Loans Compensation expense on ESOP Employee Stock Ownership Plan E S O P Compensation Expense Amortization of right-of-use asset Amortization Of Right Of Use Asset Stock based compensation Share Based Compensation Increase in accrued interest receivable Increase Decrease In Accrued Interest Receivable Net Increase in accrued interest payable Increase Decrease In Interest Payable Net Earnings on bank-owned life insurance Deferred federal income taxes Deferred Federal Income Tax Expense Benefit Decrease in accrued pension liability Increase Decrease In Pension Plan Obligations Loss (gain) on foreclosed real estate, net Amortization of identifiable assets Other, net Other Operating Activities Cash Flow Statement Net cash provided by operating activities Net Cash Provided By Used In Operating Activities INVESTING ACTIVITIES Net Cash Provided By Used In Investing Activities [Abstract] Certificate of deposit maturities Maturities Of Certificates Of Deposit Proceeds from sale of investment securities Proceeds From Sale Of Available For Sale Securities Debt Proceeds from principal repayments and maturities Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities Purchases Payments To Acquire Available For Sale Securities Increase in loans receivable, net Increase Decrease In Finance Receivables Redemption of regulatory stock Proceeds From Sale Of Federal Home Loan Bank Stock Purchase of regulatory stock Payments To Acquire Federal Home Loan Bank Stock Proceeds from sale of foreclosed real estate Proceeds From Sale Of Foreclosed Assets Purchase of premises, equipment and software Payments For Proceeds From Productive Assets Net cash used for investing activities Net Cash Provided By Used In Investing Activities FINANCING ACTIVITIES Net Cash Provided By Used In Financing Activities [Abstract] Decrease in deposits, net Increase Decrease In Deposits Net increase in short-term borrowings Proceeds From Repayments Of Short Term Debt Proceeds from other borrowings Proceeds From Other Debt Repayment of other borrowings Repayments Of Other Debt Increase in advances by borrowers for taxes and insurance Increase Decrease In Advances By Borrowers For Taxes And Insurance Purchase of treasury shares Payments For Repurchase Of Common Stock Dividends on common stock Payments Of Dividends Common Stock Net cash provided by (used for) financing activities Net Cash Provided By Used In Financing Activities Increase and decrease in cash and cash equivalents Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CASH AND CASH EQUIVALENTS AT END OF YEAR SUPPLEMENTAL CASH FLOW DISCLOSURES Supplemental Cash Flow Elements [Abstract] Cash Paid: Supplemental Cash Flow Information [Abstract] Interest Interest Paid Net Income taxes Income Taxes Paid Net Noncash items: Noncash Investing And Financing Items [Abstract] Transfers from loans to foreclosed real estate Transfer Of Other Real Estate Initial recognition of operating right-of-use asset Noncash Initial Recognition Of Operating Right Of Use Asset Initial recognition of operating lease liability Noncash Initial Recognition Of Operating Lease Liability Unrealized holding gains Noncash Unrealized Holding Gain Loss Organization Consolidation And Presentation Of Financial Statements [Abstract] Nature of Operations and Basis of Presentation Organization Consolidation And Presentation Of Financial Statements Disclosure [Text Block] Earnings per Share Earnings Per Share [Text Block] Use of estimates in preparation of financial statements. Text Block [Abstract] Use of Estimates in the Preparation of Financial Statements Use Of Estimates In Preparation Of Financial Statements [Text Block] Accounting Changes And Error Corrections [Abstract] Accounting Pronouncements Accounting Changes And Error Corrections [Text Block] Investments Debt And Equity Securities [Abstract] Investment Securities Investments In Debt And Marketable Equity Securities And Certain Trading Assets Disclosure [Text Block] Receivables [Abstract] Loans Receivable, Net and Allowance for Loan Losses Loans Notes Trade And Other Receivables Disclosure [Text Block] Banking And Thrift [Abstract] Deposits Deposit Liabilities Disclosures [Text Block] Compensation And Retirement Disclosure [Abstract] Net Periodic Benefit Cost-Defined Benefit Plan Pension And Other Postretirement Benefits Disclosure [Text Block] Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] Equity Incentive Plan Disclosure Of Compensation Related Costs Share Based Payments [Text Block] Fair Value Disclosures [Abstract] Fair Value Fair Value Disclosures [Text Block] Equity [Abstract] Accumulated Other Comprehensive Income (Loss) Comprehensive Income Note [Text Block] Derivative Instruments And Hedging Activities Disclosure [Abstract] Derivatives and Hedging Activities Derivative Instruments And Hedging Activities Disclosure [Text Block] Commitments And Contingencies Disclosure [Abstract] Contingent Liabilities Legal Matters And Contingencies [Text Block] Revenue From Contract With Customer [Abstract] Revenue Recognition Revenue From Contract With Customer [Text Block] Leases [Abstract] Leases Lessee Operating Leases [Text Block] Adoption of new standards. Adoption of New Standards Adoption Of New Standards Policy [Text Block] Recent Accounting Pronouncements New Accounting Pronouncements Policy Policy [Text Block] Composition of the Weighted-Average Common Shares (Denominator) Used in the Basic and Diluted Earnings Per Share Computation Schedule Of Weighted Average Number Of Shares Table [Text Block] Summary of Amortized Cost, Gross Unrealized Gains and Losses, and Fair Value of Investment Securities Available for Sale Unrealized Gain Loss On Investments Table [Text Block] Summary of Unrealized and Realized Gains Losses Recognized in Net Income on Equity Securities Trading Securities And Certain Trading Assets [Text Block] Schedule of Amortized Cost and Fair Value of Debt Securities by Contractual Maturity Investments Classified By Contractual Maturity Date Table [Text Block] Schedule of Gross Unrealized Losses and Fair Value Schedule Of Unrealized Loss On Investments Table [Text Block] Summary of Loans Receivable Schedule Of Accounts Notes Loans And Financing Receivable [Text Block] Schedule of loans acquired with deteriorated credit quality. Summary of Additional Information Regarding Loans Acquired and Accounted Schedule Of Loans Acquired With Deteriorated Credit Quality Table [Text Block] Financing receivables individually and collectively evaluated for impairment. Schedule of Loans Evaluated for Impairment Financing Receivables Individually And Collectively Evaluated For Impairment Table [Text Block] Schedule of Investment and Unpaid Principal Balances for Impaired Loans Impaired Financing Receivables Table [Text Block] Classes of the Loan Portfolio, Internal Risk Rating System Financing Receivable Credit Quality Indicators Table [Text Block] Schedule of performing and nonperforming loans. Schedule of Performing or Nonperforming Loans Schedule Of Performing And Nonperforming Loans Table [Text Block] Classes of the Loan Portfolio Summarized by the Aging Categories Past Due Financing Receivables Table [Text Block] Summary of Changes in Primary Segments of ALL Schedule Of Credit Losses Related To Financing Receivables Noncurrent Table [Text Block] Summary of Troubled Debt Restructuring Granted Troubled Debt Restructurings On Financing Receivables Table [Text Block] Schedule of deposits by major classifications. Schedule of Deposits by Major Classifications Schedule Of Deposits By Major Classifications Table [Text Block] Summary of the Components of Net Periodic Benefit Cost Schedule Of Net Benefit Costs Table [Text Block] Postemployment Benefits [Abstract] Schedule of Restricted Stock Option Activity Schedule Of Nonvested Restricted Stock Units Activity Table [Text Block] Schedule of Fair Value For Assets and Liabilities Required to be Measured and Reported at Fair Value on a Recurring Basis Schedule Of Fair Value Assets And Liabilities Measured On Recurring Basis Table [Text Block] Schedule of Changes in Fair Value of Level III Investments Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Text Block] Schedule of Fair Value For Assets Required to be Measured and Reported at Fair Value on a Nonrecurring Basis Fair Value Assets Measured On Nonrecurring Basis [Text Block] Summary of Additional Quantitative Information about Assets Measured at Fair Value on a Nonrecurring Basis Fair Value Assets Measured On Nonrecurring Basis Valuation Techniques [Text Block] Schedule of Carrying Value and Fair Value for Certain Financial Instruments not Required to be Measured and Reported at Fair Value Fair Value By Balance Sheet Grouping [Text Block] Summary of Activity in Accumulated Other Comprehensive Income (Loss) Schedule Of Accumulated Other Comprehensive Income Loss Table [Text Block] Summary of Reclassification Out of Accumulated Other Comprehensive Income (Loss) Reclassification Out Of Accumulated Other Comprehensive Income Table [Text Block] Schedule of Fair Value of Derivative Financial Instruments as well as their Classification on Consolidated Balance Sheet Schedule Of Derivative Instruments In Statement Of Financial Position Fair Value [Text Block] Schedule of Effect of Fair Value and Cash Flow Hedge Accounting on Accumulated Other Comprehensive Income (Loss) Schedule Of Derivative Instruments Effect On Other Comprehensive Income Loss Table [Text Block] Schedule of supplemental balance sheet information related to leases. Summary of Balance Sheet Operating Lease Right-of-Use Assets and Lease Liabilities Schedule Of Supplemental Balance Sheet Information Related To Leases Table [Text Block] Schedule of weighted average remaining term and discount rates. Summary of Lease Term and Discount Rate Schedule Of Weighted Average Remaining Term And Discount Rates Table [Text Block] Summary of Components of Lease Cost Lease Cost Table [Text Block] Schedule of future minimum lease payments. Summary of Future Minimum Lease Payments Schedule Of Future Minimum Lease Payments Table [Text Block] Collaboration Arrangement Disclosure [Abstract] Collaboration Arrangement Disclosure [Abstract] Summary Of Significant Accounting Policies [Line Items] Summary Of Significant Accounting Policies [Table] Summary Of Significant Accounting Policies [Table] Summary Of Significant Accounting Policies [Table] Ownership Ownership [Axis] Ownership Ownership [Domain] ESSA Advisory Services LLC. ESSA Advisory Services, LLC [Member] E S S A Advisory Services L L C [Member] Summary Of Significant Accounting Policies [Line Items] Summary Of Significant Accounting Policies [Line Items] Percentage ownership of wholly owned subsidiary Minority Interest Ownership Percentage By Parent Weighted average number of shares unearned non vested shares. Additional common stock equivalents stock options used to calculate diluted earnings per share. Weighted-average common shares outstanding Weighted Average Number Of Shares Issued Basic Average treasury stock shares Weighted Average Number Of Shares Treasury Stock Average unearned ESOP shares Weighted Average Number Of Shares Employee Stock Ownership Plan Shares Not Committed To Be Released Average unearned non-vested shares Weighted Average Number Of Shares Unearned Non Vested Shares Weighted average common shares and common stock equivalents used to calculate basic earnings per share Weighted Average Number Of Shares Outstanding Basic Additional common stock equivalents (stock options) used to calculate diluted earnings per share Additional Common Stock Equivalents Stock Options Used To Calculate Diluted Earnings Per Share Weighted average common shares and common stock equivalents used to calculate diluted earnings per share Weighted Average Number Of Diluted Shares Outstanding Average weighted price per share of antidilutive shares. Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Table] Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Table] Antidilutive Securities Antidilutive Securities Excluded From Computation Of Earnings Per Share By Antidilutive Securities [Axis] Antidilutive Securities, Name Antidilutive Securities Name [Domain] Stock Option [Member] Employee Stock Option [Member] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] Anti-dilutive securities Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount Average weighted price per share of anti-dilutive shares Average Weighted Price Per Share Of Antidilutive Shares New Accounting Pronouncements Or Change In Accounting Principle [Table] New Accounting Pronouncements Or Change In Accounting Principle [Table] Accounting standards update 2016-02 and 2018-01 and 2018-11 and 2018-20 and 2019-01. ASU 2016-02, ASU 2018-01, ASU 2018-11, ASU 2018-20, and ASU 2019-01 [Member] Accounting Standards Update201602 And201801 And201811 And201820201901 [Member] New Accounting Pronouncements Or Change In Accounting Principle [Line Items] New Accounting Pronouncements Or Change In Accounting Principle [Line Items] Right-of-use assets Operating Lease Right Of Use Asset Lease liabilities Operating Lease Liability Investment Securities Available For Sale [Abstract] Investment Securities Available For Sale [Abstract] Schedule Of Available For Sale Securities [Table] Schedule Of Available For Sale Securities [Table] Financial Instrument Financial Instrument [Axis] Financial Instruments Transfers And Servicing Of Financial Instruments Types Of Financial Instruments [Domain] Debt collateralized by real estate mortgage loans and issued by the federal national mortgage association. Fannie Mae [Member] Fannie Mae [Member] Freddie Mac [Member] Mortgage Backed Securities Issued By U S Government Sponsored Enterprises [Member] Governmental national mortgage association. Governmental National Mortgage Association [Member] Governmental National Mortgage Association [Member] Mortgage-Backed Securities [Member] Mortgage Backed Securities [Member] Obligations of States and Political Subdivisions [Member] U S States And Political Subdivisions [Member] U.S. Government Agency Securities [Member] U S Government Agencies Debt Securities [Member] Corporate Obligations [Member] Corporate Debt Securities [Member] Other Debt Securities [Member] Other Debt Securities [Member] Total Debt Securities [Member] Debt Securities [Member] Schedule of Available-for-sale Securities [Line Items] Schedule Of Available For Sale Securities [Line Items] Available for sale, Amortized Cost Available For Sale Debt Securities Amortized Cost Basis Available for sale, Gross Unrealized Gains Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax Available for sale, Gross Unrealized Losses Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax Available for sale, Fair Value Net (losses) gains recognized during the period on equity securities Equity Securities Fv Ni Unrealized Gain Loss Less: Net gains recognized during the period on equity securities sold during the period Equity Securities Fv Ni Realized Gain Loss Unrealized (losses) gains recognized during the reporting period on equity securities still held at the reporting date Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract] Available For Sale Securities Debt Maturities Amortized Cost [Abstract] Due in one year or less, Amortized Cost Available For Sale Securities Debt Maturities Within One Year Amortized Cost Due after one year through five years, Amortized Cost Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost Due after five years through ten years, Amortized Cost Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost Due after ten years, Amortized Cost Available For Sale Securities Debt Maturities After Ten Years Amortized Cost Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] Available For Sale Securities Debt Maturities Fair Value [Abstract] Due in one year or less, Fair Value Available For Sale Securities Debt Maturities Within One Year Fair Value Due after one year through five years, Fair Value Available For Sale Securities Debt Maturities After One Through Five Years Fair Value Due after five years through ten years, Fair Value Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value Due after ten years, Fair Value Available For Sale Securities Debt Maturities After Ten Years Fair Value Total, Fair Value Realized gross losses on sale of investments. Amortized cost and fair value debt securities. Amortized Cost And Fair Value Debt Securities [Abstract] Realized gross gains Gross Investment Income Operating Realized gross losses Realized Gross Losses Proceeds from the sale of investment securities Payments For Proceeds From Investments Governmental National Mortgage Association [Member] Number of Securities, Debt Debt Securities Available For Sale Unrealized Loss Position Number Of Positions Fair Value, Less than Twelve Months, Debt Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Gross Unrealized Losses, Less than Twelve Months, Debt Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss Fair Value, Twelve Months or Greater, Debt Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Gross Unrealized Losses, Twelve Months or Greater, Debt Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss Fair Value Total, Debt Debt Securities Available For Sale Unrealized Loss Position Gross Unrealized Losses Total, Debt Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss Schedule Of Accounts Notes Loans And Financing Receivable [Table] Schedule Of Accounts Notes Loans And Financing Receivable [Table] Financing Receivable Portfolio Segment Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment Financing Receivable Portfolio Segment [Domain] Residential [Member] Residential Portfolio Segment [Member] Construction portfolio segment. Construction [Member] Construction Portfolio Segment [Member] Commercial [Member] Commercial Real Estate Portfolio Segment [Member] Commercial Loans [Member] Commercial Portfolio Segment [Member] Class of Financing Receivable Financing Receivable Recorded Investment By Class Of Financing Receivable [Axis] Class of Financing Receivable Financing Receivable Recorded Investment Class Of Financing Receivable [Domain] Real Estate Loans [Member] Real Estate Loan [Member] Obligations of states and political subdivisions loan. Obligations of States and Political Subdivisions [Member] Obligations Of States And Political Subdivisions Loan [Member] Home equity loans and lines of credit. Home Equity Loans and Lines of Credit [Member] Home Equity Loans And Lines Of Credit [Member] Auto Loans [Member] Automobile Loan [Member] Other financing receivable. Other [Member] Other Financing Receivable [Member] Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts Notes And Loans Receivable [Line Items] Real estate loans: Accounts Notes Loans And Financing Receivable Gross Allowance And Net [Abstract] Total Loans Loans And Leases Receivable Gross Carrying Amount Less allowance for loan losses Net loans Acquired loans with specific evidence or deterioration in credit quality outstanding balance. Credit Loss Status Credit Loss Status [Axis] Credit Loss Status Credit Loss Status [Domain] Loans Acquired with Deteriorated Credit Quality [Member] Financial Asset Acquired With Credit Deterioration [Member] Outstanding balance Acquired Loans With Specific Evidence Deterioration In Credit Quality Outstanding Balance Carrying amount Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Table] Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Table] Financing Receivable, Recorded Investment [Line Items] Financing Receivable Recorded Investment [Line Items] Individually Evaluated for Impairment Financing Receivable Individually Evaluated For Impairment Collectively Evaluated for Impairment Financing Receivable Collectively Evaluated For Impairment Schedule Of Impaired Financing Receivable [Table] Schedule Of Impaired Financing Receivable [Table] Internal Credit Assessment Internal Credit Assessment [Axis] Internal Credit Assessment Internal Credit Assessment [Domain] Impaired loans with no allowance recorded. With no Specific Allowance Recorded [Member] Impaired Loans With No Allowance Recorded [Member] Impaired loans with an allowance recorded. With an Allowance Recorded [Member] Impaired Loans With Allowance Recorded [Member] Financing Receivable, Impaired [Line Items] Financing Receivable Impaired [Line Items] Recorded Investment Impaired Financing Receivable Recorded Investment Unpaid Principal Balance Impaired Financing Receivable Unpaid Principal Balance Associated Allowance Impaired Financing Receivable Related Allowance Average Recorded Investment Impaired Financing Receivable Average Recorded Investment Interest Income Recognized Impaired Financing Receivable Interest Income Cash Basis Method Financing receivable loan categories considered as not criticized. Financing receivable loans considered as substandard days past due. Mortgage loan. Mortgage Loans [Member] Mortgage Loan [Member] Home Equity Loans [Member] Home Equity Loan [Member] Subsequent Event Type Subsequent Event Type [Axis] Subsequent Event Type Subsequent Event Type [Domain] Subsequent Event [Member] Subsequent Event [Member] Troubled debt restructurings. Troubled Debt Restructurings [Member] Troubled Debt Restructurings [Member] Loan Restructuring Modification Loan Restructuring Modification [Axis] Loan Restructuring Modification Loan Restructuring Modification [Domain] Payment Deferrals or Payments of Interest Only [Member] Payment Deferral [Member] Criteria in internal rating system Financing Receivable Credit Quality Additional Information Categories considered as not criticized Financing Receivable Loan Categories Considered As Not Criticized Days past due over which loans are considered as substandard Financing Receivable Loans Considered As Substandard Term Past Due Minimum internal review amount. Minimum external review amount. Minimum internal review amount Minimum Internal Review Amount Minimum external review amount Minimum External Review Amount Schedule Of Financing Receivables Past Due [Table] Schedule Of Financing Receivables Past Due [Table] Commercial and municipal portfolio segment. Commercial And Municipal Portfolio Segment Commercial And Municipal Portfolio Segment [Member] Pass [Member] Pass [Member] Special Mention [Member] Special Mention [Member] Substandard [Member] Substandard [Member] Doubtful [Member] Doubtful [Member] Financing Receivable, Recorded Investment, Past Due [Line Items] Financing Receivable Recorded Investment Past Due [Line Items] Loan, total Financial Instrument Performance Status Financial Instrument Performance Status [Axis] Financial Instrument Performance Status Financial Instrument Performance Status [Domain] Performing [Member] Performing Financing Receivable [Member] Non-performing [Member] Nonperforming Financing Receivable [Member] Receivable Type Accounts Notes Loans And Financing Receivable By Receivable Type [Axis] Receivable Receivable Type [Domain] Consumer Portfolio Segment [Member] Consumer Portfolio Segment [Member] Total Current Financing Receivable Recorded Investment Current 31-60 Days Past Due Financing Receivable Recorded Investment Thirty One To Sixty Days Past Due 61-89 Days Past Due Financing Receivable Recorded Investment Sixty One To Eighty Nine Days Past Due 90+ Days Past Due and Accruing Financing Receivable Recorded Investment90 Days Past Due And Still Accruing Non-accrual Financing Receivable Recorded Investment Nonaccrual Status Total Past Due Financing Receivable Recorded Investment Past Due And Nonaccrual Purchased Credit Impaired, Accruing Financing Receivable Recorded Investment Purchased Credit Impaired Accruing Purchased Credit Impaired, Nonaccrual Financing Receivable Recorded Investment Purchased Credit Impaired Nonaccrual Total Loans Schedule Of Financing Receivable Allowance For Credit Losses [Table] Schedule Of Financing Receivable Allowance For Credit Losses [Table] Unallocated [Member] Unallocated Financing Receivables [Member] Financing Receivable, Allowance for Credit Losses [Line Items] Financing Receivable Allowance For Credit Losses [Line Items] Balance, Beginning of period Charge-offs Allowance For Loan And Lease Losses Write Offs Recoveries Allowance For Loan And Lease Loss Recovery Of Bad Debts Provision Balance, End of period Loans requesting payment relief reported as percentage of loans outstanding. Payment relief loan reported as percentage of loans outstanding Loans Requesting Payment Relief Reported As Percentage Of Loans Outstanding Individually evaluated for impairment Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 Collectively evaluated for impairment Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment Schedule Of Financing Receivable Troubled Debt Restructurings [Table] Schedule Of Financing Receivable Troubled Debt Restructurings [Table] Financing Receivable, Modifications [Line Items] Financing Receivable Modifications [Line Items] Number of Contracts Financing Receivable Modifications Number Of Contracts2 Pre-Modification Outstanding Recorded Investment Financing Receivable Modifications Pre Modification Recorded Investment2 Post-Modification Outstanding Recorded Investment Financing Receivable Modifications Post Modification Recorded Investment2 Number of Contracts Troubled debt restructurings loans granted interest rate concession. Number of troubled debt restructuring loans granted interest rate concession. Number of troubled debt restructuring loans granted interest rate concession Number Of Troubled Debt Restructuring Loans Granted Interest Rate Concession Troubled debt restructurings loans granted interest rate concession Troubled Debt Restructurings Loans Granted Interest Rate Concession Number of troubled debt restructuring loans granted terms concessions. Troubled debt restructurings loans granted terms concessions. Number of troubled debt restructuring loans granted terms and rate concessions. Troubled debt restructurings loans granted terms and rate concessions. Number of troubled debt restructuring loans granted terms concessions Number Of Troubled Debt Restructuring Loans Granted Terms Concessions Troubled debt restructurings granted terms concession Troubled Debt Restructurings Loans Granted Terms Concessions Number of troubled debt restructuring loans granted terms and rate concessions Number Of Troubled Debt Restructuring Loans Granted Terms And Rate Concessions Troubled debt restructurings granted terms and rate concession Troubled Debt Restructurings Loans Granted Terms And Rate Concessions Financing receivable modifications defaulted in current period number of contracts. Number of troubled debt restructurings, loan modified, defaulted within one year of modification Financing Receivable Modifications Defaulted In Current Period Number Of Contracts Number of customer. Number of customers Number Of Customer Modified loans amount Non-interest bearing demand accounts Noninterest Bearing Domestic Deposit Demand Interest bearing demand accounts Interest Bearing Domestic Deposit Demand Money market accounts Deposits Money Market Deposits Savings and club accounts Deposits Savings Deposits Certificates of deposit Time Deposits Total Compensation Related Costs [Abstract] Service Cost Defined Benefit Plan Service Cost Interest Cost Defined Benefit Plan Interest Cost Expected return on plan assets Defined Benefit Plan Expected Return On Plan Assets Amortization of unrecognized loss Defined Benefit Plan Other Costs Net periodic benefit cost Defined Benefit Plan Net Periodic Benefit Cost Share based compensation arrangement by share based payment award maximum units. Share based compensation arrangement by share based payment award additional number of shares available for grant. Compensation related costs. Compensation Related Costs Disclosure [Table] Compensation Related Costs Disclosure [Table] Compensation Related Costs Disclosure [Table] Award Type Award Type [Axis] Award Type Share Based Compensation Arrangements By Share Based Payment Award Award Type And Plan Name [Domain] Restricted Stock [Member] Restricted Stock [Member] Plan Name Plan Name [Axis] Plan Name Plan Name [Domain] Twenty zero seven equity incentive plan. 2007 Equity Incentive Plan [Member] Twenty Zero Seven Equity Incentive Plan [Member] Twenty sixteen equity incentive plan. 2016 Plan [Member] Twenty Sixteen Equity Incentive Plan [Member] Statistical Measurement Range [Axis] Statistical Measurement Range [Member] Minimum [Member] Minimum [Member] Maximum [Member] Maximum [Member] Compensation Related Costs Disclosure [Line Items] Compensation Related Costs Disclosure [Line Items] Common stock issuance, Grant Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant Number of available shares Share Based Compensation Arrangement By Share Based Payment Award Maximum Units Further number of shares, grants Share Based Compensation Arrangement By Share Based Payment Award Additional Number Of Shares Available For Grant Restricted shares vesting period Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Period1 Share based compensation arrangement by share based payment award options expected future expense. Share based compensation arrangement by share based payment award options remaining vesting period. Share-based compensation expense Expected future expense Share Based Compensation Arrangement By Share Based Payment Award Options Expected Future Expense Remaining vesting periods Share Based Compensation Arrangement By Share Based Payment Award Options Remaining Vesting Period Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table] Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share Based Compensation Arrangement By Share Based Payment Award [Line Items] Number of Restricted Stock, Nonvested at September 30, 2019 Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number Number of Restricted Stock, Granted Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Number of Restricted Stock, Vested Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Number of Restricted Stock, Forfeited Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period Number of Restricted Stock, Nonvested at March 31,2020 Weighted-average Grant Date Fair Value, Nonvested at September 30, 2019 Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value Weighted-average Grant Date Fair Value, Granted Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value Weighted-average Grant Date Fair Value, Vested Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Weighted Average Grant Date Fair Value Weighted-average Grant Date Fair Value, Forfeited Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeitures Weighted Average Grant Date Fair Value Weighted-average Grant Date Fair Value, Nonvested at March 31,2020 Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table] Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table] Measurement Frequency Fair Value By Measurement Frequency [Axis] Measurement Frequency Fair Value Measurement Frequency [Domain] Fair Value, Measurements, Recurring [Member] Fair Value Measurements Recurring [Member] Fair Value Hierarchy and NAV Fair Value By Fair Value Hierarchy Level [Axis] Fair Value Hierarchy and NAV Fair Value Measurements Fair Value Hierarchy [Domain] Level I [Member] Fair Value Inputs Level1 [Member] Level II [Member] Fair Value Inputs Level2 [Member] Level III [Member] Fair Value Inputs Level3 [Member] Asset Class Fair Value By Asset Class [Axis] Asset Class Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation By Asset Class [Domain] 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] Assets Financial Instruments Financial Assets Balance Sheet Groupings [Abstract] Total Debt Securities Equity securities- financial services Equity Securities Fv Ni Derivatives and hedging activities Derivative Fair Value Of Derivative Asset Liabilities Financial Instruments Financial Liabilities Balance Sheet Groupings [Abstract] Derivatives and hedging activities Derivative Fair Value Of Derivative Liability Beginning balance Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value Purchases, sales, issuances, settlements, net Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchases Sales Issuances Settlements Total unrealized gain (loss): Fair Value Measured On Recurring Basis Gain Loss Included In Earnings [Abstract] Included in earnings Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Earnings1 Included in other comprehensive income (loss) Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Other Comprehensive Income Loss Transfers in and/or out of Level III Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Net Ending balance Impaired loans measured on non recurring basis. Fair Value, Measurements, Nonrecurring [Member] Fair Value Measurements Nonrecurring [Member] Impaired loans Impaired Loans Measured On Non Recurring Basis Impaired loans. Impaired Loans [Member] Impaired Loans [Member] Foreclosed real estate owned. Foreclosed Real Estate Owned [Member] Foreclosed Real Estate Owned [Member] Fair Value Estimate Assets Fair Value Disclosure Servicing Asset Valuation Technique Extensible List Servicing Asset Valuation Technique Extensible List Servicing Asset, Measurement Input [Extensible List] Servicing Asset Measurement Input Extensible List Fair value input appraisal adjustments Servicing Asset Measurement Input Number of impaired loans. Impaired loans carrying value. Number of impaired loans Number Of Impaired Loans Impaired loans, carrying value Impaired Loans Carrying Value Impaired loans, valuation allowance Impaired loans, net fair value Loans Receivable Fair Value Disclosure Accrued interest receivable fair value disclosure. Regulatory stock fair value disclosure. Accrued interest payable fair value disclosure. Fair Value By Balance Sheet Grouping [Table] Fair Value By Balance Sheet Grouping [Table] Measurement Basis Fair Value By Measurement Basis [Axis] Fair Value Disclosure Item Amounts [Default] Portion At Fair Value Fair Value Disclosure [Member] Fair Value Measurement Fair Value Disclosure Item Amounts [Domain] Carrying Value [Member] Carrying Reported Amount Fair Value Disclosure [Member] Estimated Fair Value [Member] Estimate Of Fair Value Fair Value Disclosure [Member] Level 1 [Member] Level 1 [Member] Level 3 [Member] Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] Financial assets: Cash and cash equivalents Cash And Cash Equivalents Fair Value Disclosure Loans receivable, net Accrued interest receivable Accrued Interest Receivable Fair Value Disclosure Regulatory stock Regulatory Stock Fair Value Disclosure Mortgage servicing rights Servicing Asset At Amortized Value Financial liabilities: Deposits Deposits Fair Value Disclosure Short-term borrowings Shortterm Debt Fair Value Accrued interest payable Accrued Interest Payable Fair Value Disclosure Certificates of deposit at fair value. Certificates of deposit Certificates Of Deposit At Fair Value Accumulated Other Comprehensive Income Loss [Table] Accumulated Other Comprehensive Income Loss [Table] Defined Benefit Pension Plan [Member] Accumulated Defined Benefit Plans Adjustment [Member] Unrealized Gains (Losses) on Securities Available for Sale [Member] Accumulated Net Unrealized Investment Gain Loss [Member] Derivatives [Member] Accumulated Gain Loss Net Cash Flow Hedge Parent [Member] Accumulated Other Comprehensive Income/(Loss) [Member] Accumulated Other Comprehensive Income Loss [Line Items] Accumulated Other Comprehensive Income Loss [Line Items] Other comprehensive income (loss) before reclassifications Other Comprehensive Income Loss Before Reclassifications Net Of Tax Amounts reclassified from accumulated other comprehensive income (loss) Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax Reclassification of certain income tax effects from accumulated other comprehensive income (loss) Tax Cuts And Jobs Act Reclassification From A O C I To Retained Earnings Tax Effect Total other comprehensive income (loss) Other Comprehensive Income Loss Net Of Tax Reclassification out of Accumulated Other Comprehensive Income Reclassification Out Of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income Reclassification Out Of Accumulated Other Comprehensive Income [Domain] Reclassification Out of Accumulated Other Comprehensive Income (Loss) [Member] Reclassification Out Of Accumulated Other Comprehensive Income [Member] Derivatives [Member] Gain on sale of investment securities available for sale, net Debt And Equity Securities Gain Loss Short-term borrowings interest expense Income taxes Fair Values Derivatives Balance Sheet Location By Derivative Contract Type By Hedging Designation [Table] Fair Values Derivatives Balance Sheet Location By Derivative Contract Type By Hedging Designation [Table] Derivative Instrument Derivative Instrument Risk [Axis] Derivative Contract Derivative Contract Type [Domain] FHLB Advances [Member] Federal Home Loan Bank Advances [Member] Commercial Loans [Member] Commercial Loan [Member] Brokered Deposits. Brokered Deposits [Member] Brokered Deposits [Member] Hedging Designation Hedging Designation [Axis] Hedging Designation Hedging Designation [Domain] Designated as Hedging Instrument [Member] Designated As Hedging Instrument [Member] Balance Sheet Location Balance Sheet Location [Axis] Balance Sheet Location Balance Sheet Location [Domain] Other Assets [Member] Other Assets [Member] Other Liabilities [Member] Other Liabilities [Member] Derivatives Fair Value [Line Items] Derivatives Fair Value [Line Items] Derivatives, Notional Amount Derivative Notional Amount Fair Values of Derivative Instruments, Asset Fair Values of Derivative Instruments, Liability Derivative Instruments And Hedging Activities Disclosures [Table] Derivative Instruments And Hedging Activities Disclosures [Table] Hedging Relationship Derivative Instruments Gain Loss By Hedging Relationship [Axis] Hedging Relationship Hedging Relationship [Domain] Cash Flow Hedges of Interest Rate Risk [Member] Cash Flow Hedging [Member] Interest Rate Swaps [Member] Interest Rate Swap [Member] Trading Activity Trading Activity By Type [Axis] Trading Activity, by Type Trading Activity By Type [Domain] Variable Rate [Member] Variable Income Interest Rate [Member] Long-term Debt, Type Longterm Debt Type [Axis] Long-term Debt, Type Longterm Debt Type [Domain] Federal home loan bank advances brokered certificates and commercial loans. FHLB Advances, Brokered Certificates and Commercial Loans [Member] Federal Home Loan Bank Advances Brokered Certificates And Commercial Loans [Member] Scenario Statement Scenario [Axis] Scenario Scenario Unspecified [Domain] Scenario, Forecast [Member] Scenario Forecast [Member] Derivative Instruments And Hedging Activities Disclosures [Line Items] Derivative Instruments And Hedging Activities Disclosures [Line Items] Derivative, number of instruments Derivative Number Of Instruments Held Derivative, notional principal amount Interest expense Interest income Increase (decrease) in accrued interest payable Derivative Instruments Gain Loss By Hedging Relationship By Income Statement Location By Derivative Instrument Risk [Table] Derivative Instruments Gain Loss By Hedging Relationship By Income Statement Location By Derivative Instrument Risk [Table] Interest Rate Products [Member] Interest Rate Contract [Member] Income Statement Location Income Statement Location [Axis] Income Statement Location Income Statement Location [Domain] Interest Expense [Member] Interest Expense [Member] Derivative Instruments Gain Loss [Line Items] Derivative Instruments Gain Loss [Line Items] Loss Recognized in OCI on Derivative Gain (Loss) Reclassified from Accumulated OCI into Income Derivative Instruments Gain Loss Reclassified From Accumulated O C I Into Income Effective Portion Net Derivative liability, collateral against obligations Derivative Liability Fair Value Of Collateral Loss contingency additional number of plaintiffs. Number of plaintiffs Loss Contingency Number Of Plaintiffs Additional number of plaintiffs Loss Contingency Additional Number Of Plaintiffs Operating lease right-of-use assets Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] Operating Lease Right Of Use Asset Statement Of Financial Position Extensible List Operating lease Liabilities Operating Lease, Liability, Statement of Financial Position [Extensible List] Operating Lease Liability Statement Of Financial Position Extensible List Weighted average remaining lease term. Weighted average discount rate. Weighted average remaining lease term Weighted Average Remaining Lease Term [Abstract] Operating leases Operating Lease Weighted Average Remaining Lease Term1 Weighted average discount rate Weighted Average Discount Rate [Abstract] Operating leases Operating Lease Weighted Average Discount Rate Percent Lease Cost [Abstract] Operating lease cost Operating Lease Cost Variable lease cost Variable Lease Cost Net lease cost Lease Cost March 31, 2021 Lessee Operating Lease Liability Payments Remainder Of Fiscal Year March 31, 2022 Lessee Operating Lease Liability Payments Due Year Two March 31, 2023 Lessee Operating Lease Liability Payments Due Year Three March 31, 2024 Lessee Operating Lease Liability Payments Due Year Four March 31, 2025 Lessee Operating Lease Liability Payments Due Year Five Therafter Lessee Operating Lease Liability Payments Due After Year Five Total future minimum lease payments Lessee Operating Lease Liability Payments Due Amounts representing interest Lessee Operating Lease Liability Undiscounted Excess Amount Present Value of Net Future Minimum Lease Payments