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v2.4.1.9

Loan Commitments and Other Related Activities (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013
Commitments to make loans |  |
Loan commitments and other related activities Loan commitments and other related activities |  |
Contractual amounts of financial instruments - variable rate | $ 1,000 us-gaap_LoansAndLeasesReceivableCommitmentsVariableRates / us-gaap_FinancialInstrumentAxis = us-gaap_CommitmentsToExtendCreditMember | $ 850 us-gaap_LoansAndLeasesReceivableCommitmentsVariableRates / us-gaap_FinancialInstrumentAxis = us-gaap_CommitmentsToExtendCreditMember
Commitments to make loans | Maximum |  |
Loan commitments and other related activities Loan commitments and other related activities |  |
Period for which loan commitments are made | 60 days |
Commitments to make loans | Multi-family |  |
Loan commitments and other related activities Loan commitments and other related activities |  |
Number of loan commitments | 1 byfc_LoanCommitmentsNumber / us-gaap_FinancialInstrumentAxis = us-gaap_CommitmentsToExtendCreditMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = byfc_MultiFamilyResidentialLoanMember |
Period for which initial interest rate is applicable | 5 years |
Initial interest rate (as a percent) | 3.375%byfc_LoansInterestRateStatedPercentage / us-gaap_FinancialInstrumentAxis = us-gaap_CommitmentsToExtendCreditMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = byfc_MultiFamilyResidentialLoanMember |
Unused lines of credit |  |
Loan commitments and other related activities Loan commitments and other related activities |  |
Contractual amounts of financial instruments - variable rate | $ 365 us-gaap_LoansAndLeasesReceivableCommitmentsVariableRates / us-gaap_FinancialInstrumentAxis = us-gaap_UnusedLinesOfCreditMember | $ 255 us-gaap_LoansAndLeasesReceivableCommitmentsVariableRates / us-gaap_FinancialInstrumentAxis = us-gaap_UnusedLinesOfCreditMember

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- Definition Represents the period for which the entity makes commitments to make loans. + References No definition available. + Details
Name: | byfc_CommitmentsToMakeLoansPeriods
Namespace Prefix: | byfc_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Represents the initial period for which the specified interest rate is applicable under commitments to make loans. + References No definition available. + Details
Name: | byfc_LoanCommitmentsInitialInterestRatePeriod
Namespace Prefix: | byfc_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Represents the number of loan commitments as of the balance sheet date. + References No definition available. + Details
Name: | byfc_LoanCommitmentsNumber
Namespace Prefix: | byfc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition Represents the initial interest rate related to a commitment to make a loan. + References No definition available. + Details
Name: | byfc_LoansInterestRateStatedPercentage
Namespace Prefix: | byfc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Reflects the amount of cash required to fully fund agreements to provide advances to borrowers and lessees at interest rates that increase or decrease depending on certain facts or circumstances. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 825 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6480020&loc=d3e61082-112788 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 825 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=6480020&loc=d3e61044-112788 + Details
Name: | us-gaap_LoansAndLeasesReceivableCommitmentsVariableRates
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
Name: | us-gaap_OtherCommitmentsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_CommitmentsToExtendCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_UnusedLinesOfCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |