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Restructuring of the Company's Capital Structure and Regulatory Matters (Details) (USD $) | 0 Months Ended | 3 Months Ended | 12 Months Ended | 1 Months Ended | 0 Months Ended |  |  |
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Oct. 16, 2014 | Dec. 31, 2014 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Jan. 31, 2014 | Aug. 22, 2013 | Dec. 05, 2013 | Oct. 30, 2013 director | Mar. 17, 2004 | Nov. 27, 2013
Restructuring of the Company's Capital Structure and Regulatory Matters |  |  |  |  |  |  |  |  |  |  |
Period of raising additional capital to generate liquidity |  |  | 3 years |  |  |  |  |  |  |  |
Amount of cash available after recapitalization |  |  |  | $ 1,200,000 byfc_AmountOfCashAvailableAfterRestructuring |  |  |  |  |  |  |
Common stock, shares issued | 8,829,549 us-gaap_CommonStockSharesIssued |  |  |  |  |  |  |  |  |  |
Gross proceeds from issuance of common stock new issues | 9,700,000 byfc_GrossProceedsFromIssuanceOfCommonStockNewIssues |  |  |  |  |  |  |  |  |  |
Senior debt |  |  |  | 2,923,000 byfc_SeniorDebt |  |  |  |  |  |  |
Junior subordinated debentures | 5,100,000 us-gaap_SubordinatedDebt | 5,100,000 us-gaap_SubordinatedDebt | 5,100,000 us-gaap_SubordinatedDebt | 6,000,000 us-gaap_SubordinatedDebt |  |  |  |  |  |  |
Repayments of senior debt | 2,400,000 us-gaap_RepaymentsOfSeniorDebt |  | 2,425,000 us-gaap_RepaymentsOfSeniorDebt |  |  |  |  |  |  |  |
Tier 1 (Core) capital to adjusted total assets required under consent order, ratio (as a percent) |  | 9.00%byfc_TierOneLeverageCapitalRequiredUnderConsentOrder | 9.00%byfc_TierOneLeverageCapitalRequiredUnderConsentOrder | 9.00%byfc_TierOneLeverageCapitalRequiredUnderConsentOrder |  |  |  |  | 9.00%byfc_TierOneLeverageCapitalRequiredUnderConsentOrder |  |
Total Risk-Based Capital to Risk-Weighted Assets, ratio per consent order (as a percent) |  | 13.00%byfc_CapitalRequiredUnderConsentOrderRatio | 13.00%byfc_CapitalRequiredUnderConsentOrderRatio | 13.00%byfc_CapitalRequiredUnderConsentOrderRatio |  |  |  |  | 13.00%byfc_CapitalRequiredUnderConsentOrderRatio |  |
Tier 1 (Core) Capital to Adjusted Total Assets, ratio generally required under OCC regulations (as a percent) |  | 4.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets | 4.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets | 4.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets |  |  |  |  | 4.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets |  |
Total Risk-Based Capital to Risk-Weighted Assets, ratio generally required under OCC regulations (as a percent) |  | 8.00%us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets | 8.00%us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets | 8.00%us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets |  |  |  |  | 8.00%us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets |  |
Minimum number of independent directors required to be on Compliance Committee |  |  |  |  |  |  |  |  | 3 byfc_NumberOfIndependentDirectorsInComplianceCommittee |  |
Transfer of portfolio loans to held for sale |  | 22,800,000 us-gaap_TransferOfPortfolioLoansAndLeasesToHeldForSale1 | 22,754,000 us-gaap_TransferOfPortfolioLoansAndLeasesToHeldForSale1 | 7,259,000 us-gaap_TransferOfPortfolioLoansAndLeasesToHeldForSale1 |  |  |  |  |  |  |
Directors and Officers |  |  |  |  |  |  |  |  |  |  |
Restructuring of the Company's Capital Structure and Regulatory Matters |  |  |  |  |  |  |  |  |  |  |
Gross proceeds from issuance of common stock new issues |  |  |  |  | 200,000 byfc_GrossProceedsFromIssuanceOfCommonStockNewIssues / us-gaap_TitleOfIndividualAxis = byfc_DirectorsAndOfficersMember |  |  |  |  |  |
Private Placement |  |  |  |  |  |  |  |  |  |  |
Restructuring of the Company's Capital Structure and Regulatory Matters |  |  |  |  |  |  |  |  |  |  |
Payments to acquire interest in subsidiaries and affiliates | 2,500,000 us-gaap_PaymentsToAcquireInterestInSubsidiariesAndAffiliates / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PrivatePlacementMember |  |  |  |  |  |  |  |  |  |
Common stock, shares issued | 8,829,549 us-gaap_CommonStockSharesIssued / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PrivatePlacementMember |  |  |  |  |  |  |  |  |  |
Gross proceeds from issuance of common stock new issues | 9,700,000 byfc_GrossProceedsFromIssuanceOfCommonStockNewIssues / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PrivatePlacementMember |  |  |  |  |  |  |  |  |  |
Junior subordinated debentures | 5,100,000 us-gaap_SubordinatedDebt / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PrivatePlacementMember |  |  |  |  |  |  |  |  |  |
Repayments of senior debt | 2,400,000 us-gaap_RepaymentsOfSeniorDebt / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PrivatePlacementMember |  |  |  |  |  |  |  |  |  |
Portion of common stock proceeds retained to enhance liquidity | 2,200,000 byfc_AmountOfCommonStockProceedsRetainedForLiquidity / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PrivatePlacementMember |  |  |  |  |  |  |  |  |  |
Common Stock |  |  |  |  |  |  |  |  |  |  |
Restructuring of the Company's Capital Structure and Regulatory Matters |  |  |  |  |  |  |  |  |  |  |
Number of shares of Common Stock issued in private sales |  |  | 8,829,549 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 4,317,531 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |  |  |  |
Voting common stock | Common Stock |  |  |  |  |  |  |  |  |  |  |
Restructuring of the Company's Capital Structure and Regulatory Matters |  |  |  |  |  |  |  |  |  |  |
Number of authorized shares of Common Stock |  | 50,000,000 us-gaap_CommonStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = byfc_VotingCommonStockMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 50,000,000 us-gaap_CommonStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = byfc_VotingCommonStockMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 50,000,000 us-gaap_CommonStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = byfc_VotingCommonStockMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |  |  |  |
Common stock, shares issued |  | 21,509,179 us-gaap_CommonStockSharesIssued / us-gaap_StatementClassOfStockAxis = byfc_VotingCommonStockMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 21,509,179 us-gaap_CommonStockSharesIssued / us-gaap_StatementClassOfStockAxis = byfc_VotingCommonStockMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 19,630,473 us-gaap_CommonStockSharesIssued / us-gaap_StatementClassOfStockAxis = byfc_VotingCommonStockMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |  |  |  |
Non-voting common stock |  |  |  |  |  |  |  |  |  |  |
Restructuring of the Company's Capital Structure and Regulatory Matters |  |  |  |  |  |  |  |  |  |  |
Common stock, shares issued | 6,973,320 us-gaap_CommonStockSharesIssued / us-gaap_StatementClassOfStockAxis = us-gaap_NonvotingCommonStockMember |  |  |  |  |  |  |  |  |  |
Non-voting common stock | Private Placement |  |  |  |  |  |  |  |  |  |  |
Restructuring of the Company's Capital Structure and Regulatory Matters |  |  |  |  |  |  |  |  |  |  |
Common stock, shares issued | 6,973,320 us-gaap_CommonStockSharesIssued / us-gaap_StatementClassOfStockAxis = us-gaap_NonvotingCommonStockMember / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PrivatePlacementMember |  |  |  |  |  |  |  |  |  |
Non-voting common stock | Common Stock |  |  |  |  |  |  |  |  |  |  |
Restructuring of the Company's Capital Structure and Regulatory Matters |  |  |  |  |  |  |  |  |  |  |
Number of authorized shares of Common Stock |  | 25,000,000 us-gaap_CommonStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = us-gaap_NonvotingCommonStockMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 25,000,000 us-gaap_CommonStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = us-gaap_NonvotingCommonStockMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 5,000,000 us-gaap_CommonStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = us-gaap_NonvotingCommonStockMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |  |  |  |
Common stock, shares issued |  | 7,671,520 us-gaap_CommonStockSharesIssued / us-gaap_StatementClassOfStockAxis = us-gaap_NonvotingCommonStockMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 7,671,520 us-gaap_CommonStockSharesIssued / us-gaap_StatementClassOfStockAxis = us-gaap_NonvotingCommonStockMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 698,200 us-gaap_CommonStockSharesIssued / us-gaap_StatementClassOfStockAxis = us-gaap_NonvotingCommonStockMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |  |  |  |
Minimum |  |  |  |  |  |  |  |  |  |  |
Restructuring of the Company's Capital Structure and Regulatory Matters |  |  |  |  |  |  |  |  |  |  |
Amount of additional equity capital to be raised as a condition under proposal to extend maturity of the Debentures |  |  |  |  |  | 6,000,000 byfc_AdditionalEquityCapitalAmountToBeRaisedAsConditionUnderProposalToExtendMaturityOfDebentures / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |  |  |
Floating Rate Junior Subordinated Debentures |  |  |  |  |  |  |  |  |  |  |
Restructuring of the Company's Capital Structure and Regulatory Matters |  |  |  |  |  |  |  |  |  |  |
Payment of principal amount at face value required to extend maturity | 900,000 byfc_DebtInstrumentPaymentOfPrincipalAmountAtFaceValueRequiredToExtendMaturity / us-gaap_LongtermDebtTypeAxis = us-gaap_JuniorSubordinatedDebtMember |  |  |  |  | 900,000 byfc_DebtInstrumentPaymentOfPrincipalAmountAtFaceValueRequiredToExtendMaturity / us-gaap_LongtermDebtTypeAxis = us-gaap_JuniorSubordinatedDebtMember |  |  |  |  |
Percent of principal at face value required to be paid to extend maturity |  |  |  |  |  | 15.00%byfc_DebtInstrumentPaymentOfPrincipalAsPercentageOfPrincipalAtFaceValueRequiredToExtendMaturity / us-gaap_LongtermDebtTypeAxis = us-gaap_JuniorSubordinatedDebtMember |  |  |  |  |
Accrued interest | 805,000 us-gaap_InterestPayableCurrentAndNoncurrent / us-gaap_LongtermDebtTypeAxis = us-gaap_JuniorSubordinatedDebtMember |  |  |  |  |  |  |  |  |  |
Junior subordinated debentures |  |  |  |  |  |  |  |  |  | 6,000,000 us-gaap_SubordinatedDebt / us-gaap_LongtermDebtTypeAxis = us-gaap_JuniorSubordinatedDebtMember |
Floating Rate Junior Subordinated Debentures | Private Placement |  |  |  |  |  |  |  |  |  |  |
Restructuring of the Company's Capital Structure and Regulatory Matters |  |  |  |  |  |  |  |  |  |  |
Accrued interest | 805,000 us-gaap_InterestPayableCurrentAndNoncurrent / us-gaap_LongtermDebtTypeAxis = us-gaap_JuniorSubordinatedDebtMember / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PrivatePlacementMember |  |  |  |  |  |  |  |  |  |
Recapitalization of the Company | Common Stock |  |  |  |  |  |  |  |  |  |  |
Restructuring of the Company's Capital Structure and Regulatory Matters |  |  |  |  |  |  |  |  |  |  |
Number of shares of Common Stock issued in private sales |  |  |  |  |  |  | 4,235,500 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember / us-gaap_StatementScenarioAxis = byfc_ReclassificationPlanMember |  |  |  |
Price per share (in dollars per share) |  |  |  |  |  |  | $ 1.00 us-gaap_SharePrice / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember / us-gaap_StatementScenarioAxis = byfc_ReclassificationPlanMember |  |  |  |
Portion of common stock proceeds used to repay inter-company payables due to the Bank |  |  |  |  |  |  | 1,000,000 us-gaap_ProceedsFromRepaymentsOfRelatedPartyDebt / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember / us-gaap_StatementScenarioAxis = byfc_ReclassificationPlanMember |  |  |  |
Payments to acquire interest in subsidiaries and affiliates |  |  |  |  |  |  | 1,200,000 us-gaap_PaymentsToAcquireInterestInSubsidiariesAndAffiliates / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember / us-gaap_StatementScenarioAxis = byfc_ReclassificationPlanMember |  |  |  |
Gross proceeds from issuance of common stock new issues |  |  |  |  |  |  | 4,200,000 byfc_GrossProceedsFromIssuanceOfCommonStockNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember / us-gaap_StatementScenarioAxis = byfc_ReclassificationPlanMember |  |  |  |
Recapitalization of the Company | Voting common stock | Common Stock |  |  |  |  |  |  |  |  |  |  |
Restructuring of the Company's Capital Structure and Regulatory Matters |  |  |  |  |  |  |  |  |  |  |
Number of authorized shares of Common Stock |  |  |  |  |  |  |  |  |  |  | 50,000,000 us-gaap_CommonStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = byfc_VotingCommonStockMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember / us-gaap_StatementScenarioAxis = byfc_ReclassificationPlanMember
Recapitalization of the Company | Non-voting common stock | Common Stock |  |  |  |  |  |  |  |  |  |  |
Restructuring of the Company's Capital Structure and Regulatory Matters |  |  |  |  |  |  |  |  |  |  |
Number of authorized shares of Common Stock |  |  |  |  |  |  |  |  |  |  | 5,000,000 us-gaap_CommonStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = us-gaap_NonvotingCommonStockMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember / us-gaap_StatementScenarioAxis = byfc_ReclassificationPlanMember
Recapitalization of the Company | Issuance of Common Stock Equivalents for five series of preferred stock | Series F non-cumulative preferred stock |  |  |  |  |  |  |  |  |  |  |
Restructuring of the Company's Capital Structure and Regulatory Matters |  |  |  |  |  |  |  |  |  |  |
Number of shares issued in exchange for preferred stock |  |  |  |  |  |  | 8,776 us-gaap_ConversionOfStockSharesIssued1 / us-gaap_ConversionOfStockByUniqueDescriptionAxis = byfc_ExchangeOfPreferredStockAndAccumulatedDividendsForSeriesFMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesFPreferredStockMember / us-gaap_StatementScenarioAxis = byfc_ReclassificationPlanMember |  |  |  |
Number of series of the entity's formerly outstanding preferred stock |  |  |  |  |  |  | 5 byfc_NumberOfSeriesOfEntitysFormerlyOutstandingPreferredStock / us-gaap_ConversionOfStockByUniqueDescriptionAxis = byfc_ExchangeOfPreferredStockAndAccumulatedDividendsForSeriesFMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesFPreferredStockMember / us-gaap_StatementScenarioAxis = byfc_ReclassificationPlanMember |  |  |  |
Aggregate liquidation value or preference of converted stock |  |  |  |  |  |  | 17,600,000 byfc_ConversionOfStockPreferredStockLiquidationPreferenceValue / us-gaap_ConversionOfStockByUniqueDescriptionAxis = byfc_ExchangeOfPreferredStockAndAccumulatedDividendsForSeriesFMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesFPreferredStockMember / us-gaap_StatementScenarioAxis = byfc_ReclassificationPlanMember |  |  |  |
Value of shares issued in exchange for preferred stock |  |  |  |  |  |  | 8,800,000 us-gaap_ConversionOfStockAmountIssued1 / us-gaap_ConversionOfStockByUniqueDescriptionAxis = byfc_ExchangeOfPreferredStockAndAccumulatedDividendsForSeriesFMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesFPreferredStockMember / us-gaap_StatementScenarioAxis = byfc_ReclassificationPlanMember |  |  |  |
Number of shares issued in exchange for accumulated dividends |  |  |  |  |  |  | 2,646 byfc_ConversionOfDividendsPayableSharesIssued / us-gaap_ConversionOfStockByUniqueDescriptionAxis = byfc_ExchangeOfPreferredStockAndAccumulatedDividendsForSeriesFMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesFPreferredStockMember / us-gaap_StatementScenarioAxis = byfc_ReclassificationPlanMember |  |  |  |
Value of shares issued in exchange for accumulated dividends |  |  |  |  |  |  | 2,600,000 byfc_ConversionOfDividendsPayableAmountIssued / us-gaap_ConversionOfStockByUniqueDescriptionAxis = byfc_ExchangeOfPreferredStockAndAccumulatedDividendsForSeriesFMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesFPreferredStockMember / us-gaap_StatementScenarioAxis = byfc_ReclassificationPlanMember |  |  |  |
Recapitalization of the Company | Issuance of Non-Voting Preferred Stock for Common Stock Equivalents | Series F non-cumulative preferred stock |  |  |  |  |  |  |  |  |  |  |
Restructuring of the Company's Capital Structure and Regulatory Matters |  |  |  |  |  |  |  |  |  |  |
Number of shares converted |  |  |  |  |  |  | 698 us-gaap_ConversionOfStockSharesConverted1 / us-gaap_ConversionOfStockByUniqueDescriptionAxis = byfc_ExchangeOfSeriesFForSeriesGMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesFPreferredStockMember / us-gaap_StatementScenarioAxis = byfc_ReclassificationPlanMember |  |  |  |
Recapitalization of the Company | Issuance of Non-Voting Preferred Stock for Common Stock Equivalents | Series G non-cumulative preferred stock |  |  |  |  |  |  |  |  |  |  |
Restructuring of the Company's Capital Structure and Regulatory Matters |  |  |  |  |  |  |  |  |  |  |
Number of shares issued in exchange for preferred stock |  |  |  |  |  |  | 6,982 us-gaap_ConversionOfStockSharesIssued1 / us-gaap_ConversionOfStockByUniqueDescriptionAxis = byfc_ExchangeOfSeriesFForSeriesGMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesGPreferredStockMember / us-gaap_StatementScenarioAxis = byfc_ReclassificationPlanMember |  |  |  |
Recapitalization of the Company | Conversion of Series F Common Stock Equivalents to Common Stock | Common Stock |  |  |  |  |  |  |  |  |  |  |
Restructuring of the Company's Capital Structure and Regulatory Matters |  |  |  |  |  |  |  |  |  |  |
Number of shares issued in exchange for preferred stock |  |  |  |  |  |  |  | 13,299,000 us-gaap_ConversionOfStockSharesIssued1 / us-gaap_ConversionOfStockByUniqueDescriptionAxis = byfc_ConversionOfSeriesFToCommonStockMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember / us-gaap_StatementScenarioAxis = byfc_ReclassificationPlanMember |  |  |
Shares issued on conversion as a percentage of the entity's total equity |  |  |  |  |  |  |  | 65.80%byfc_SharesIssuedUponConversionAsPercentageOfEntitysEquity / us-gaap_ConversionOfStockByUniqueDescriptionAxis = byfc_ConversionOfSeriesFToCommonStockMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember / us-gaap_StatementScenarioAxis = byfc_ReclassificationPlanMember |  |  |
Recapitalization of the Company | Conversion of Series F Common Stock Equivalents to Common Stock | Series F non-cumulative preferred stock |  |  |  |  |  |  |  |  |  |  |
Restructuring of the Company's Capital Structure and Regulatory Matters |  |  |  |  |  |  |  |  |  |  |
Number of shares converted |  |  |  |  |  |  |  | 13,299 us-gaap_ConversionOfStockSharesConverted1 / us-gaap_ConversionOfStockByUniqueDescriptionAxis = byfc_ConversionOfSeriesFToCommonStockMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesFPreferredStockMember / us-gaap_StatementScenarioAxis = byfc_ReclassificationPlanMember |  |  |
Recapitalization of the Company | Conversion of Series G Non-Voting Preferred Stock to non-voting Common Stock | Series G non-cumulative preferred stock |  |  |  |  |  |  |  |  |  |  |
Restructuring of the Company's Capital Structure and Regulatory Matters |  |  |  |  |  |  |  |  |  |  |
Number of shares converted |  |  |  |  |  |  |  | 6,982 us-gaap_ConversionOfStockSharesConverted1 / us-gaap_ConversionOfStockByUniqueDescriptionAxis = byfc_ConversionOfSeriesGToCommonStockMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesGPreferredStockMember / us-gaap_StatementScenarioAxis = byfc_ReclassificationPlanMember |  |  |
Recapitalization of the Company | Conversion of Series G Non-Voting Preferred Stock to non-voting Common Stock | Non-voting common stock |  |  |  |  |  |  |  |  |  |  |
Restructuring of the Company's Capital Structure and Regulatory Matters |  |  |  |  |  |  |  |  |  |  |
Number of shares issued in exchange for preferred stock |  |  |  |  |  |  |  | 698,200 us-gaap_ConversionOfStockSharesIssued1 / us-gaap_ConversionOfStockByUniqueDescriptionAxis = byfc_ConversionOfSeriesGToCommonStockMember / us-gaap_StatementClassOfStockAxis = us-gaap_NonvotingCommonStockMember / us-gaap_StatementScenarioAxis = byfc_ReclassificationPlanMember |  |  |
Shares issued on conversion as a percentage of the entity's total equity |  |  |  |  |  |  |  | 3.50%byfc_SharesIssuedUponConversionAsPercentageOfEntitysEquity / us-gaap_ConversionOfStockByUniqueDescriptionAxis = byfc_ConversionOfSeriesGToCommonStockMember / us-gaap_StatementClassOfStockAxis = us-gaap_NonvotingCommonStockMember / us-gaap_StatementScenarioAxis = byfc_ReclassificationPlanMember |  |  |
Recapitalization of the Company | Senior Debt: |  |  |  |  |  |  |  |  |  |  |
Restructuring of the Company's Capital Structure and Regulatory Matters |  |  |  |  |  |  |  |  |  |  |
Term for quarterly payments of interest |  |  |  |  |  |  | 18 months |  |  |  |
Ensuing term for monthly equal payments of principal and interest |  |  |  |  |  |  | 48 months |  |  |  |
Accrued interest forgiven |  |  |  |  |  |  | 1,800,000 byfc_InterestPayableDecreaseForgiveness / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorDebtObligationsMember / us-gaap_StatementScenarioAxis = byfc_ReclassificationPlanMember |  |  |  |
Senior debt |  |  |  |  |  |  | 2,400,000 byfc_SeniorDebt / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorDebtObligationsMember / us-gaap_StatementScenarioAxis = byfc_ReclassificationPlanMember |  |  |  |
Recapitalization of the Company | Senior Debt: | Series F non-cumulative preferred stock |  |  |  |  |  |  |  |  |  |  |
Restructuring of the Company's Capital Structure and Regulatory Matters |  |  |  |  |  |  |  |  |  |  |
Number of shares issued in the Debt Exchange |  |  |  |  |  |  | 2,575 us-gaap_DebtConversionConvertedInstrumentSharesIssued1 / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorDebtObligationsMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesFPreferredStockMember / us-gaap_StatementScenarioAxis = byfc_ReclassificationPlanMember |  |  |  |
Value of shares issued in the Debt Exchange |  |  |  |  |  |  | $ 2,600,000 us-gaap_DebtConversionConvertedInstrumentAmount1 / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorDebtObligationsMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesFPreferredStockMember / us-gaap_StatementScenarioAxis = byfc_ReclassificationPlanMember |  |  |  |

X
- Definition Represents the amount of additional equity capital to be raised, as a condition under proposal to extend the maturity of the Debentures to the trustee. + References No definition available. + Details
Name: | byfc_AdditionalEquityCapitalAmountToBeRaisedAsConditionUnderProposalToExtendMaturityOfDebentures
Namespace Prefix: | byfc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits after the recapitalization of the company. + References No definition available. + Details
Name: | byfc_AmountOfCashAvailableAfterRestructuring
Namespace Prefix: | byfc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents the amount of proceeds from issuance of common stock retained by the company to enhance its liquidity. + References No definition available. + Details
Name: | byfc_AmountOfCommonStockProceedsRetainedForLiquidity
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