XML 143 R117.htm IDEA: XBRL DOCUMENT
v2.4.1.9

OFF-BALANCE SHEET COMMITMENTS - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2015
Other Commitments [Line Items] |
Commitments to make loans period, maximum | 30 days
Commitments to sell loans under residential mortgage division | $ 612.1 us-gaap_LoansAndLeasesReceivableCommitmentsToPurchaseOrSell
Jumbo mortgage loan commitments |
Other Commitments [Line Items] |
Commitments to sell loans under residential mortgage division | 8.9 us-gaap_LoansAndLeasesReceivableCommitmentsToPurchaseOrSell / us-gaap_FinancialInstrumentAxis = banc_JumboMortgageLoanSaleCommitmentsMember
TBAs commitments |
Other Commitments [Line Items] |
Commitments to sell loans under residential mortgage division | 572.0 us-gaap_LoansAndLeasesReceivableCommitmentsToPurchaseOrSell / us-gaap_FinancialInstrumentAxis = banc_ToBeAnnouncedCommitmentsMember
Best efforts commitments |
Other Commitments [Line Items] |
Commitments to sell loans under residential mortgage division | 31.3 us-gaap_LoansAndLeasesReceivableCommitmentsToPurchaseOrSell / us-gaap_FinancialInstrumentAxis = banc_BestEffortsCommitmentsMember
Other Commitments |
Other Commitments [Line Items] |
Commitments to sell loans under residential mortgage division | 0 us-gaap_LoansAndLeasesReceivableCommitmentsToPurchaseOrSell / us-gaap_FinancialInstrumentAxis = banc_OtherCommitmentsMember
Interest rate lock commitments |
Other Commitments [Line Items] |
Commitments to sell loans under residential mortgage division | $ 439.9 us-gaap_LoansAndLeasesReceivableCommitmentsToPurchaseOrSell / us-gaap_FinancialInstrumentAxis = us-gaap_InterestRateLockCommitmentsMember

X
- Definition Other Commitments, Origination of Loans, Period + References No definition available. + Details
Name: | banc_OtherCommitmentsOriginationofLoansPeriod
Namespace Prefix: | banc_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Reflects the carrying amount of loans and leases for which agreements to acquire or dispose exist. + 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 (a) -URI http://asc.fasb.org/extlink&oid=6480020&loc=d3e61044-112788 + Details
Name: | us-gaap_LoansAndLeasesReceivableCommitmentsToPurchaseOrSell
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

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

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

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

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

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