Loans and Leases Receivable Disclosure [Abstract] Schedule of Impaired Financing Receivable [Table] Schedule of Impaired Financing Receivable [Table] Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Domain] Financing Receivable Portfolio Segment [Domain] One- to Four-Family Segment [Member] Residential Portfolio Segment [Member] Commercial Real Estate Segment [Member] Commercial Portfolio Segment [Member] Consumer Segment [Member] Consumer Portfolio Segment [Member] Class of Financing Receivable [Axis] Class of Financing Receivable, Type [Axis] Financing Receivable, Recorded Investment, Class of Financing Receivable [Domain] Class of Financing Receivable, Type [Domain] Originated [Member] One To Four Family Loans Originated [Member] One To Four Family Loans Originated [Member] 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. 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, Impaired [Line Items] Financing Receivable, Impaired [Line Items] Recorded investment in loans collectively evaluated for impairment Financing Receivable, Collectively Evaluated for Impairment Recorded investment in loans individually evaluated for impairment Financing Receivable Individually Evaluated for Impairment, Recorded Investment The balance of financing receivables that were individually evaluated for impairment. Financing receivable, total recorded investment Loans and Leases Receivable, Net of Deferred Income ACL for loans collectively evaluated for impairment Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment Fair Value Disclosures [Abstract] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Major Types of Debt and Equity Securities [Axis] Major Types of Debt and Equity Securities [Axis] Major Types of Debt and Equity Securities [Domain] Major Types of Debt and Equity Securities [Domain] GSE Debentures [Member] US Government-sponsored Enterprises Debt Securities [Member] MBS [Member] Residential Mortgage Backed Securities [Member] Municipal Bonds [Member] Municipal Bonds [Member] 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. Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] Fair Value, Inputs, Level 1 [Member] Significant Other Observable Inputs (Level 2) [Member] Fair Value, Inputs, Level 2 [Member] Significant Unobservable Inputs (Level 3) [Member] Fair Value, Inputs, Level 3 [Member] 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] AFS securities Available-for-sale Securities Home Equity [Member] Home Equity Line of Credit [Member] Other [Member] Consumer Loan [Member] Allowance Recorded and Not Recorded [Axis] Allowance Recorded and Not Recorded [Axis] Allowance recorded and not recorded. Allowance Recorded and not Recorded [Domain] Allowance Recorded and not Recorded [Domain] Allowance recorded and not recorded. With no related allowance recorded [Member] Allowance Not Recorded [Member] With no related allowance recorded. With an allowance recorded [Member] Allowance Recorded [Member] With a related allowance recorded. Recorded Investment, No Related Allowance Impaired Financing Receivable, with No Related Allowance, Recorded Investment Recorded Investment, Allowance Recorded Impaired Financing Receivable, with Related Allowance, Recorded Investment Recorded Investment Impaired Financing Receivable, Recorded Investment Unpaid Principal Balance, No Related Allowance Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance Unpaid Principal Balance, Allowance Recorded Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance Unpaid Principal Balance Impaired Financing Receivable, Unpaid Principal Balance Related ACL Impaired Financing Receivable, Related Allowance Earnings Per Share [Abstract] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] 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] 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] Average Common Shares Outstanding [Member] Average Common Shares Outstanding [Member] Average common shares outstanding Average Committed ESOP Shares Outstanding [Member] Average Committed Employee Stock Ownership Plan Shares Outstanding [Member] Average committed employee stock ownership plan shares outstanding Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Earnings Per Share Earnings Per Share Reconciliation [Abstract] Net income Net Income (Loss) Attributable to Parent Income allocated to participating securities Undistributed Earnings (Loss) Allocated to Participating Securities, Basic Net income available to common stockholders Net Income (Loss) Available to Common Stockholders, Basic Total basic average common shares outstanding Weighted Average Number of Shares Outstanding, Basic Effect of dilutive stock options Weighted Average Number Diluted Shares Outstanding Adjustment Total diluted average common shares outstanding Weighted Average Number of Shares Outstanding, Diluted Net EPS: Earnings Per Share, Basic and Diluted [Abstract] Basic Earnings Per Share, Basic Diluted Earnings Per Share, Diluted Antidilutive stock options, excluded from the diluted average common shares outstanding calculation Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Internal Credit Assessment [Axis] Internal Credit Assessment [Axis] Financing Receivable, by Credit Quality Indicator [Domain] Internal Credit Assessment [Domain] Doubtful [Member] Doubtful [Member] Loans Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] 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 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. Loans receivable Loans and Leases Receivable, Net Amount ACL maintained for individually evaluated impaired loans Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment Recorded investment of loans in process of foreclosure Mortgage Loans in Process of Foreclosure, Amount Carrying value of residential OREO Real Estate Acquired Through Foreclosure Asset Class [Axis] Asset Class [Axis] Asset Class [Domain] Asset Class [Domain] Loans Receivable [Member] Loans Receivable [Member] Other Real Estate Owned [Member] Other Real Estate Owned [Member] Other Real Estate Owned [Member] Proceeds from principal repayments Proceeds from Maturities, Prepayments and Calls of Available-for-sale Securities (Decreases) increases in net unrealized losses included in OCI Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) Loans individually evaluated for impairment Financing Receivable, Individually Evaluated for Impairment Estimated selling costs Estimated Selling Costs - Percentage Estimated Selling Costs - Percentage OREO Other Real Estate, Foreclosed Assets, and Repossessed Assets Estimated fair value of deposits Deposits, Fair Value Disclosure Disclosure of Repurchase Agreements [Abstract] 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 Repurchase agreements Securities Sold under Agreements to Repurchase Weighted average rate of repurchase agreements Assets Sold under Agreements to Repurchase, Interest Rate Accounting Policies [Abstract] Summary Of Significant Accounting Policies [Table] Summary Of Significant Accounting Policies [Table] Summary Of Significant Accounting Policies [Table] Leverage Strategy Tiers [Axis] Leverage Strategy Tiers [Axis] Leverage Strategy Tiers [Axis] Leverage Strategy Tiers [Domain] Leverage Strategy Tiers [Domain] Leverage Strategy Tiers [Domain] Leverage Strategy [Member] Leverage Strategy [Member] Leverage Strategy [Member] Summary Of Significant Accounting Policies [Line Items] Summary Of Significant Accounting Policies [Line Items] Summary Of Significant Accounting Policies [Line Items] FHLB Borrowings available for leverage strategy, maximum Federal Home Loan Bank, Advances, General Debt Obligations, Maximum Amount Available Marketable Securities [Abstract] Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Line Items] Schedule of Available-for-sale Securities [Line Items] Available-for-sale Securities, Amortized Cost Available-for-sale Securities, Amortized Cost Basis Available-for-sale Securities, Gross Unrealized Gains Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax Available-for-sale Securities, Gross Unrealized Losses Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax Available-for-sale Securities, Estimated Fair Value Schedule of Held-to-maturity Securities [Table] Schedule of Held-to-maturity Securities [Table] Schedule of Held-to-maturity Securities [Line Items] Schedule of Held-to-maturity Securities [Line Items] Held-to-maturity Securities, Amortized Cost Held-to-maturity Securities Held-to-maturity Securities, Gross Unrealized Gains Held-to-maturity Securities, Accumulated Unrecognized Holding Gain Held-to-maturity Securities, Gross Unrealized Losses Held-to-maturity Securities, Accumulated Unrecognized Holding Loss Held-to-maturity securities, Estimated Fair Value Held-to-maturity Securities, Fair Value Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Table] Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Table] Repurchase Agreements and Similar Transactions, Maturity Periods [Axis] Repurchase Agreements and Similar Transactions, Maturity Periods [Axis] Repurchase Agreements and Similar Transactions, Maturity Periods [Domain] Repurchase Agreements and Similar Transactions, Maturity Periods [Domain] Due In 2017 [Member] Maturity Current Year [Member] Maturity period during current fiscal year for repurchase agreements and similar transactions, for example, but not limited to, securities lending arrangements. Due In 2018 [Member] Maturity Year One [Member] Maturity period in first fiscal year following the reporting date for repurchase agreements and similar transactions, for example, but not limited to, securities lending arrangements. Due In 2019 [Member] Maturity Year Two [Member] Maturity period in second fiscal year following the reporting date for repurchase agreements and similar transactions, for example, but not limited to, securities lending arrangements. Due In 2020 [Member] Maturity Year Three [Member] Maturity period in third fiscal year following the reporting date for repurchase agreements and similar transactions, for example, but not limited to, securities lending arrangements. Due In 2021 [Member] Maturity Year Four [Member] Maturity period in fourth fiscal year following the reporting date for repurchase agreements and similar transactions, for example, but not limited to, securities lending arrangements. Due Thereafter [Member] Maturity Beyond Year Four [Member] Maturity period beyond fourth fiscal year following the reporting date for repurchase agreements and similar transactions, for example, but not limited to, securities lending arrangements. Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items] Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items] Statement of Comprehensive Income [Abstract] Changes in net unrealized holding gains (losses) on AFS securities, deferred income taxes Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax Statement of Financial Position [Abstract] Interest-earning deposits Interest-bearing Deposits in Banks and Other Financial Institutions Available-for-sale securities, amortized cost Held-to-maturity securities, estimated fair value Loans receivable, allowance for credit 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 Preferred stock, shares outstanding Preferred Stock, Shares Outstanding 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 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, Subsequent Default, Number of Contracts Recorded Investment Financing Receivable, Modifications, Subsequent Default, Recorded Investment Other than temporary impairments, amount Other than Temporary Impairment Losses, Investments Basis of Presentation Basis of Accounting, Policy [Policy Text Block] 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 Low Income Housing Partnerships Low Income Housing Partnerships, Policy [Policy Text Block] Disclosure of accounting policy for low income housing partnerships Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Repurchase Agreements Repurchase Agreements, Resale Agreements, Securities Borrowed, and Securities Loaned Disclosure [Text Block] Number of Contracts Financing Receivable, Modifications, Number of Contracts Pre-Restructured Outstanding Financing Receivable, Modifications, Pre-Modification Recorded Investment Post-Restructured Outstanding Financing Receivable, Modifications, Post-Modification Recorded Investment Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Measurement Basis [Axis] Measurement Basis [Axis] Fair Value, Disclosure Item Amounts [Domain] Fair Value Measurement [Domain] Portion at Fair Value Measurement [Member] Portion at Fair Value Measurement [Member] Carrying Amount [Member] Reported Value Measurement [Member] Estimated Fair Value [Member] Estimate of Fair Value Measurement [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Assets: Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] Cash and cash equivalents Cash and Cash Equivalents, Fair Value Disclosure HTM securities Loans receivable Loans Receivable, Fair Value Disclosure FHLB stock Investment in Federal Home Loan Bank Stock, Fair Value Disclosure Liabilities: Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract] Deposits FHLB borrowings Federal Home Loan Bank Borrowings, Fair Value Disclosure Repurchase agreements Securities Loaned or Sold under Agreements to Repurchase, Fair Value Disclosure Schedule of Financing Receivable, Recorded Investment, Credit Quality Indicator [Table] Schedule of Financing Receivable, Recorded Investment, Credit Quality Indicator [Table] Special Mention [Member] Special Mention [Member] Substandard [Member] Substandard [Member] Financing Receivable, Recorded Investment [Line Items] Financing Receivable, Recorded Investment [Line Items] Financing receivable, total recorded investment Securities Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Summary Of Significant Accounting Policies Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block] Investments in Affordable Housing Projects [Abstract] Investment In affordable housing limited partnerships Investment In Affordable Housing Limited Partnerships The Bank's investment in low income housing partnerships Obligations related to investments in affordable housing limited partnerships Qualified Affordable Housing Project Investments, Commitment Affordable housing tax credits commitment, year to be paid Affordable Housing Tax Credits Commitment, Year to be Paid Proportional amortization expense, amount Amortization Method Qualified Affordable Housing Project Investments, Amortization Affordable housing tax credits, amount Affordable Housing Tax Credits and Other Tax Benefits, Amount 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 Affordable housing other tax benefits, amount Affordable Housing Other Tax Benefits, Amount Amount of affordable housing other tax benefits recognized. Impairment losses from the forfeiture or ineligibility of tax credits or other circumstances, amount Affordable Housing Project Investment, Write-down, Amount Statement of Stockholders' Equity [Abstract] Statement [Table] Statement [Table] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock [Member] Common Stock [Member] Additional Paid-In Capital [Member] Additional Paid-in Capital [Member] 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. Retained Earnings [Member] Retained Earnings [Member] AOCI [Member] AOCI Attributable to Parent [Member] Statement [Line Items] Statement [Line Items] Balance Stockholders' Equity Attributable to Parent Other comprehensive income (loss), net of tax Other Comprehensive Income (Loss), Net of Tax ESOP activity, net Stock Issued During Period, Value, Employee Stock Ownership Plan Restricted stock activity, net Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures Stock-based compensation Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Stock options exercised Stock Issued During Period, Value, Stock Options Exercised Cash dividends to stockholders ($0.38 per share) Dividends, Cash Balance Statement of Cash Flows [Abstract] CASH FLOWS FROM OPERATING ACTIVITIES: Net Cash Provided by (Used in) Operating Activities [Abstract] 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] FHLB stock dividends Dividend Income, Operating Amortization and accretion of premiums and discounts on securities Accretion (Amortization) of Discounts and Premiums, Investments Depreciation and amortization of premises and equipment Depreciation, Nonproduction 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. Common stock committed to be released for allocation - ESOP Employee Stock Ownership Plan (ESOP), Compensation Expense Stock-based compensation Share-based Compensation Changes in: Increase (Decrease) in Operating Capital [Abstract] Other assets, net Increase (Decrease) in Other Operating Assets Income taxes payable/receivable Increase (Decrease) in Income Taxes Payable Accounts payable and accrued expenses Increase (Decrease) in Accounts Payable and Accrued Liabilities Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities, Continuing Operations CASH FLOWS FROM INVESTING ACTIVITIES: Net Cash Provided by (Used in) Investing Activities [Abstract] Purchase of AFS securities Payments to Acquire Available-for-sale Securities Purchase of HTM securities Payments to Acquire Held-to-maturity Securities Proceeds from calls, maturities and principal reductions of AFS securities Proceeds from calls, maturities and principal reductions of HTM securities Proceeds from Maturities, Prepayments and Calls of Held-to-maturity Securities Proceeds from the redemption of FHLB stock Proceeds from Sale of Federal Home Loan Bank Stock Purchase of FHLB stock Payments to Acquire Federal Home Loan Bank Stock Net increase in loans receivable Payments for (Proceeds from) Loans and Leases Purchase of premises and equipment Payments to Acquire Property, Plant, and Equipment Proceeds from sale of other real estate owned (OREO) Proceeds from Sale of Foreclosed Assets Net cash (used in) provided by investing activities Net Cash Provided by (Used in) Investing Activities, Continuing Operations CASH FLOWS FROM FINANCING ACTIVITIES: Net Cash Provided by (Used in) Financing Activities [Abstract] Dividends paid Payments of Dividends Net change in deposits Increase (Decrease) in Deposits Proceeds from borrowings Proceeds from Federal Home Loan Bank Borrowings Repayments on borrowings Repayments of Federal Home Loan Bank Borrowings Change in advance payments by borrowers for taxes and insurance Increase (Decrease) in Advance Payments by Borrowers for Taxes and Insurance Stock options exercised Proceeds from Stock Options Exercised Excess tax benefits from stock options Excess Tax Benefit from Share-based Compensation, Financing Activities Net cash used in financing activities Net Cash Provided by (Used in) Financing Activities, Continuing Operations NET DECREASE IN CASH AND CASH EQUIVALENTS Cash and Cash Equivalents, Period Increase (Decrease) CASH AND CASH EQUIVALENTS: Cash and Cash Equivalents, at Carrying Value [Abstract] Beginning of period Cash and Cash Equivalents, at Carrying Value End of period SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION: Supplemental Cash Flow Information [Abstract] Income tax payments Income Taxes Paid Interest payments Interest Paid Weighted average credit score Weighted Average Credit Score Weighted Average Credit Score Weighted average LTV Weighted Average Loan To Value Ratio Weighted Average Loan To Value Ratio. Average Recorded Investment, No Related Allowance Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment Average Recorded Investment, Allowance Recorded Impaired Financing Receivable, with Related Allowance, Average Recorded Investment Average Recorded Investment Impaired Financing Receivable, Average Recorded Investment Interest Income Recognized, No Related Allowance Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method Interest Income Recognized, Allowance Recorded Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method Interest Income Recognized Impaired Financing Receivable, Interest Income, Accrual Method Amortized Cost, Estimated Fair Value, And Gross Unrealized Gains And Losses Of AFS Securities Available-for-sale Securities [Table Text Block] Amortized Cost, Estimated Fair Value, And Gross Unrealized Gains And Losses Of HTM Securities Held-to-maturity Securities [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] Schedule Of Contractual Maturities Investments Classified by Contractual Maturity Date [Table Text Block] Schedule Of Taxable And Non-taxable Components Of Interest Income Interest Income and Interest Expense Disclosure [Table Text Block] 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. 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. Recorded Investment in Loans, Past Due Past Due Financing Receivables [Table Text Block] Recorded Investment in Loans, Nonaccrual Schedule of Financing Receivables, Non Accrual Status [Table Text Block] Recorded Investment in Classified Loans Financing Receivable Credit Quality Indicators [Table Text Block] 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 Troubled Debt Restructurings on Financing Receivables Troubled Debt Restructurings on Financing Receivables [Table Text Block] Impaired Loans by Class Impaired Financing Receivables [Table Text Block] Allowance for Credit Losses Allowance for Credit Losses on Financing Receivables [Table Text Block] 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. Repurchase agreements Pledged Financial Instruments, Not Separately Reported, Securities for Repurchase Agreements Federal Reserve Bank Pledged Financial Instruments, Not Separately Reported, Securities for Other Debt Facilities Total securities pledged as collateral Pledged Financial Instruments, Not Separately Reported, Securities Document And Entity Information [Abstract] Document and entity information [Abstract] Entity Registrant Name Entity Registrant Name Trading Symbol Trading Symbol Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Document Type Document Type Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Amendment Flag Amendment Flag Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Investment Holdings [Table] Investment Holdings [Table] Schedule of Investments [Line Items] Schedule of Investments [Line Items] Available-for-sale Securities, Continuous Unrealized Loss Position, Less Than 12 Months, Estimated Fair Value Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value Available-for-sale Securities, Continuous Unrealized Loss Position, Less Than 12 Months, Unrealized Losses Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Available-for-sale Securities, Continuous Unrealized Loss Position, Equal to or Greater Than 12 Months, Estimated Fair Value Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value Available-for-sale Securities, Continuous Unrealized Loss Position, Equal to or Greater Than 12 Months, Unrealized Losses Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Held-to-maturity Securities, Continuous Unrealized Loss Position, Less Than 12 Months, Estimated Fair Value Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value Held-to-maturity Securities, Continuous Unrealized Loss Position, Less Than 12 Months, Unrealized Losses Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Held-to-maturity Securities, Continuous Unrealized Loss Position, Equal to or Greater Than 12 Months, Estimated Fair Value Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value Held-to-maturity Securities, Continuous Unrealized Loss Position, Equal to or Greater Than 12 Months, Unrealized Losses Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss ASSETS: Assets [Abstract] Cash and cash equivalents (includes interest-earning deposits of $128,460 and $267,829) Securities: Available-for-sale (AFS), at estimated fair value (amortized cost of $492,395 and $517,791) Held-to-maturity (HTM), at amortized cost (estimated fair value of $1,027,292 and $1,122,867) Loans receivable, net (allowance for credit losses (ACL) of $8,521 and $8,540) Federal Home Loan Bank Topeka (FHLB) stock, at cost Federal Home Loan Bank Stock Premises and equipment, net Property, Plant and Equipment, Net Other assets Other Assets TOTAL ASSETS Assets LIABILITIES: Liabilities [Abstract] Deposits Deposits, Domestic FHLB borrowings Long-term Federal Home Loan Bank Advances Advance payments by borrowers for taxes and insurance Advance Payments by Borrowers for Taxes and Insurance Income taxes payable, net Accrued Income Taxes, Current Deferred income tax liabilities, net Deferred Tax Liabilities, Net Accounts payable and accrued expenses Accounts Payable and Other Accrued Liabilities Total liabilities Liabilities STOCKHOLDERS' EQUITY: Stockholders' Equity Attributable to Parent [Abstract] Preferred stock, $.01 par value; 100,000,000 shares authorized, no shares issued or outstanding Preferred Stock, Value, Issued Common stock, $.01 par value; 1,400,000,000 shares authorized, 137,915,672 and 137,486,172 shares issued and outstanding as of December 31, 2016 and September 30, 2016, respectively Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital, Common Stock Unearned compensation, Employee Stock Ownership Plan (ESOP) Unearned ESOP Shares Retained earnings Retained Earnings (Accumulated Deficit) Accumulated other comprehensive income (AOCI), net of tax Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax Total stockholders' equity TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY Liabilities and Equity Other comprehensive income (loss), net of tax: Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Changes in unrealized holding gains (losses) on AFS securities, net of taxes of $799 and $1,700 Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax Comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Total assets measured at fair value on a non-recurring basis, carrying value Assets, Fair Value Disclosure, Nonrecurring Loans Receivable And Allowance For Credit Losses Financing Receivables [Text Block] Income Statement [Abstract] INTEREST AND DIVIDEND INCOME: Interest and Dividend Income, Operating [Abstract] Loans receivable Interest and Fee Income, Loans and Leases Mortgage-backed securities (MBS) Interest Income, Securities, Mortgage Backed Cash and cash equivalents Interest Income, Deposits with Financial Institutions FHLB stock Investment securities Interest and Dividend Income, Securities, Operating Total interest and dividend income Interest and Dividend Income, Operating INTEREST EXPENSE: Interest Expense [Abstract] FHLB borrowings Interest Expense, Federal Home Loan Bank and Federal Reserve Bank Advances, Long-term Deposits Interest Expense, Deposits Repurchase agreements Interest Expense, Securities Sold under Agreements to Repurchase Total interest expense Interest Expense NET INTEREST INCOME Interest Income (Expense), Net PROVISION FOR CREDIT LOSSES Provision for Loan and Lease Losses NET INTEREST INCOME AFTER PROVISION FOR CREDIT LOSSES Interest Income (Expense), after Provision for Loan Loss NON-INTEREST INCOME: Noninterest Income [Abstract] Retail fees and charges Fees and Commissions, Depositor Accounts Income from bank-owned life insurance (BOLI) Bank Owned Life Insurance Income Other non-interest income Noninterest Income, Other Total non-interest income Noninterest Income NON-INTEREST EXPENSE: Noninterest Expense [Abstract] Salaries and employee benefits Labor and Related Expense Information technology and communications Communications and Information Technology Occupancy, net Occupancy, Net 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. 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. Federal insurance premium Federal Deposit Insurance Corporation Premium Expense Advertising and promotional Advertising Expense Office supplies and related expense Supplies and Postage Expense Low income housing partnerships Low Income Housing Partnerships Non-interest expense related to low income housing partnership investments. Other non-interest expense Other Noninterest Expense Total non-interest expense Noninterest Expense INCOME BEFORE INCOME TAX EXPENSE Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest INCOME TAX EXPENSE Income Tax Expense (Benefit) NET INCOME Basic earnings per share (EPS) Diluted EPS Dividends declared per share Common Stock, Dividends, Per Share, Declared Basic weighted average common shares Diluted weighted average common shares Schedule Of Fair Value Assets Measured On A Recurring Basis Fair Value, Assets Measured on Recurring Basis [Table Text Block] Schedule Of Fair Value Assets Measured On A Non-recurring Basis Fair Value Measurements, Nonrecurring [Table Text Block] Schedule Of Carrying Amounts And Estimated Fair Values Of Financial Instruments Fair Value, by Balance Sheet Grouping [Table Text Block] Class of Financing Receivable [Domain] Construction [Member] Construction Loans [Member] Permanent [Member] Commercial Loan [Member] Loans receivable, gross Loans and Leases Receivable before Fees, Gross Total real estate loans LoansAndLeasesReceivableTotalRealEstateGross Total (gross) amount of real estate loans, including unamortized fees, discounts, expenses, and premiums, and undisbursed loan funds. ACL Discounts/unearned loan fees Loans and Leases Receivable, Deferred Income Premiums/deferred costs Loans And Leases Receivable Premiums Deferred Costs Loans And Leases Receivable Premiums Deferred Costs Loans receivable, net Fair Value Of Financial Instruments Fair Value Disclosures [Text Block] Cash dividends to stockholders Schedule Of Earnings Per Share, Basic And Diluted Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Low Income Housing Partnerships Affordable Housing Program [Text Block] Schedule of Financing Receivables Past Due [Table] Schedule of Financing Receivables Past Due [Table] Financing Receivable, Recorded Investment, Past Due [Line Items] Financing Receivable, Recorded Investment, Past Due [Line Items] Financing receivable, nonaccrual loans Financing Receivable, Recorded Investment, Nonaccrual Status Taxable Interest Income, Securities, Operating, Taxable Non-taxable Interest Income, Securities, Operating, Tax Exempt Interest income on investment securities Debt Securities [Member] Debt Securities [Member] Investment Holdings [Line Items] Investment Holdings [Line Items] Available-for-sale Securities, One year or less, Amortized Cost Available-for-sale Securities, Debt Maturities, Next Twelve Months, Amortized Cost Basis Available-for-sale Securities, One year through five years, Amortized Cost Available-for-sale Securities, Debt Maturities, Year Two Through Five, Amortized Cost Basis Available-for-sale Securities, Five years through ten years, Amortized Cost Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Amortized Cost Basis Available-for-sale Securities, Ten years and thereafter, Amortized Cost Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis Available-for-sale Securities, Amortized Cost Available-for-sale Securities, One year or less, Estimated Fair Value Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value Available-for-sale Securities, One year through five years, Estimated Fair Value Available-for-sale Securities, Debt Maturities, Year Two Through Five, Fair Value Available-for-sale Securities, Five years through ten years, Estimated Fair Value Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Fair Value Available-for-sale Securities, Ten years and thereafter, Estimated Fair Value Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value Available-for-sale Securities, Estimated Fair Value Held-to-maturity Securities, One year or less, Amortized Cost Held-to-maturity Securities, Debt Maturities, within One Year, Net Carrying Amount Held-to-maturity Securities, One year through five years, Amortized Cost Held-to-maturity Securities, Debt Maturities, after One Through Five Years, Net Carrying Amount Held-to-maturity Securities, Five years through ten years, Amortized Cost Held-to-maturity Securities, Debt Maturities, after Five Through Ten Years, Net Carrying Amount Held-to-maturity Securities, Ten years and thereafter, Amortized Cost Held-to-maturity Securities, Debt Maturities, after Ten Years, Net Carrying Amount Held-to-maturity Securities, Amortized Cost Held-to-maturity Securities, One year or less, Estimated Fair Value Held-to-maturity Securities, Debt Maturities, Next Twelve Months, Fair Value Held-to-maturity Securities, One year through five years, Estimated Fair Value Held-to-maturity Securities, Debt Maturities, Year Two Through Five, Fair Value Held-to-maturity Securities, Five years through ten years, Estimated Fair Value Held-to-maturity Securities, Debt Maturities, Year Six Through Ten, Fair Value Held-to-maturity Securities, Ten years and thereafter, Estimated Fair Value Held-to-maturity Securities, Debt Maturities, after Ten Years, Fair Value Held-to-maturity Securities, Estimated Fair Value Maturity of Repurchase Agreements Remaining Contractual Maturity of Repurchase Agreements [Table Text Block] Tabular disclosure of remaining contractual maturity of repurchase agreements. Financing Receivables, Period Past Due [Axis] Financing Receivables, Period Past Due [Axis] Financing Receivables, Period Past Due [Domain] Financing Receivables, Period Past Due [Domain] Financing Receivables, 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. Financing Receivables, Equal to Greater than 90 Days Past Due [Member] Financing Receivables, Equal to Greater than 90 Days Past Due [Member] Financing receivable, total delinquent loans Financing Receivable, Recorded Investment, Past Due Financing receivable, current loans Financing Receivable, Recorded Investment, Current Earnings Per Share Earnings Per Share [Text Block] Schedule of Financing Receivable, Allowance for Credit Losses [Table] Schedule of Financing Receivable, Allowance for Credit Losses [Table] Financing Receivable, Allowance for Credit Losses [Line Items] Financing Receivable, Allowance for Credit Losses [Line Items] Beginning Balance Financing Receivable, Allowance for Credit Losses Charge-offs Financing Receivable, Allowance for Credit Losses, Write-downs Recoveries Financing Receivable, Allowance for Credit Losses, Recovery Provision for credit losses Provision for Loan, Lease, and Other Losses Ending Balance