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Summary of Significant Accounting Policies (Details) | Dec. 31, 2014 item
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Los Angeles, California |
Real estate owned |
Number of retail-banking offices | 2 byfc_NumberOfRetailBankingOffices / us-gaap_RealEstatePropertiesAxis = byfc_LosAnglesCaliforniaMember
Nearby city of Inglewood, California |
Real estate owned |
Number of retail-banking offices | 1 byfc_NumberOfRetailBankingOffices / us-gaap_RealEstatePropertiesAxis = byfc_NearbyCityOfInglewoodCaliforniaMember

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- Definition Represents the number of retail-banking offices operated by the entity. + References No definition available. + Details
Name: | byfc_NumberOfRetailBankingOffices
Namespace Prefix: | byfc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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

X
- Details
Name: | us-gaap_RealEstatePropertiesAxis=byfc_LosAnglesCaliforniaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RealEstatePropertiesAxis=byfc_NearbyCityOfInglewoodCaliforniaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |