Transfer from loans to loans provided for sales of other real estate owned

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Name:	banc_TransferFromLoansToLoansProvidedForSalesOfOtherRealEstateOwned
Namespace Prefix:	banc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Loans Provided for Sales of Other Real Estate Owned and Deferred Gains on Other Real Estate Owned Sold on Contract (Detail) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Real Estate [Line Items]
Loans provided for sales of other real estate owned sold on contract
Deferred gain on other real estate sold on contract