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Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Cash Flows [Abstract]
Transfer of loans receivable to loans held for, transfer from allowance for loan and lease losses	$ 0	$ 613	$ 1,443

X

- Definition

Transfer of Portfolio Loans and Leases to Held-for-sale, Allowance

+ References

No definition available.

+ Details

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

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- References

No definition available.

+ Details

Name:	us-gaap_StatementOfCashFlowsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration