Loans Receivable Held For Sale (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Charge-offs, Non-performing loans	$ 3.2	$ 2.5

Charge-offs to the allowance for loan losses on non-performing loans held-for-sale.

No definition available.

Name:	byfc_NonPerformingLoansChargeOff
Namespace Prefix:	byfc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant