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Summary of Significant Accounting Policies (Details 4) (Preferred stock, USD $) | 12 Months Ended
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Dec. 31, 2014
Series A |
Preferred stock |
Preferred stock, par value (in dollars per share) | $ 0.01 us-gaap_PreferredStockParOrStatedValuePerShare / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember
Preferred stock, liquidation preference (in dollars per share) | $ 10.00 us-gaap_PreferredStockLiquidationPreference / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember
Preferred stock dividend rate (as a percent) | 5.00%us-gaap_PreferredStockDividendRatePercentage / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember
Series B |
Preferred stock |
Preferred stock, par value (in dollars per share) | $ 0.01 us-gaap_PreferredStockParOrStatedValuePerShare / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember
Preferred stock, liquidation preference (in dollars per share) | $ 10.00 us-gaap_PreferredStockLiquidationPreference / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember
Preferred stock dividend rate (as a percent) | 5.00%us-gaap_PreferredStockDividendRatePercentage / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember
Series C |
Preferred stock |
Preferred stock, par value (in dollars per share) | $ 0.01 us-gaap_PreferredStockParOrStatedValuePerShare / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesCPreferredStockMember / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember
Preferred stock, liquidation preference (in dollars per share) | $ 13.00 us-gaap_PreferredStockLiquidationPreference / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesCPreferredStockMember / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember
Preferred stock conversion price (In dollars per share) | $ 13.00 byfc_ConvertiblePreferredStockConversionPricePerShare / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesCPreferredStockMember / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember
Preferred stock dividend rate (as a percent) | 5.00%us-gaap_PreferredStockDividendRatePercentage / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesCPreferredStockMember / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember
Series D |
Preferred stock |
Preferred stock, par value (in dollars per share) | $ 0.01 us-gaap_PreferredStockParOrStatedValuePerShare / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesDPreferredStockMember / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember
Preferred stock, liquidation preference (in dollars per share) | $ 1,000 us-gaap_PreferredStockLiquidationPreference / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesDPreferredStockMember / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember
Preferred stock dividend rate (as a percent) | 5.00%us-gaap_PreferredStockDividendRatePercentage / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesDPreferredStockMember / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember
Series E |
Preferred stock |
Preferred stock, par value (in dollars per share) | $ 0.01 us-gaap_PreferredStockParOrStatedValuePerShare / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesEPreferredStockMember / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember
Preferred stock, liquidation preference (in dollars per share) | $ 1,000 us-gaap_PreferredStockLiquidationPreference / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesEPreferredStockMember / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember
Preferred stock dividend rate (as a percent) | 5.00%us-gaap_PreferredStockDividendRatePercentage / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesEPreferredStockMember / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember

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- Definition Represents the conversion price for each share of convertible preferred stock that is converted. + References No definition available. + Details
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- Details
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Balance Type: | na
Period Type: | duration

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- Definition The percentage rate used to calculate dividend payments on preferred stock. + References No definition available. + Details
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- Definition The per share liquidation preference (or restrictions) of nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) that has a preference in involuntary liquidation considerably in excess of the par or stated value of the shares. The liquidation preference is the difference between the preference in liquidation and the par or stated values of the share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21484-112644 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph d -Article 4 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(d)(1)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.28) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29 -Article 5 + Details
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