XML 101 R81.htm IDEA: XBRL DOCUMENT
v3.3.1.900

FAIR VALUES OF FINANCIAL INSTRUMENTS - Reconciliation of Assets Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |
Beginning Balance | $ 19,082 | $ 13,535 | $ 3,953
Transfers in (out of) Level 3 | 1,088 | 0 | 0
Total gains or losses (realized/unrealized): |  |  |
Included in earnings-fair value adjustment | (3,568) | (233) | 1,360
Additions | 63,818 | 26,399 | 11,463
Sales and settlements | (12,190) | (20,619) | (3,241)
Ending Balance | 68,230 | 19,082 | 13,535
Private label residential mortgage-backed securities |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |
Beginning Balance | 0 | 0 | 2,214
Transfers in (out of) Level 3 | 0 | 0 | 0
Total gains or losses (realized/unrealized): |  |  |
Included in earnings-fair value adjustment | 0 | 0 | 0
Additions | 0 | 0 | 0
Sales and settlements | 0 | 0 | (2,214)
Ending Balance | 0 | 0 | 0
Mortgage Servicing Rights |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |
Beginning Balance | 19,082 | 13,535 | 1,739
Transfers in (out of) Level 3 | 0 | 0 | 0
Total gains or losses (realized/unrealized): |  |  |
Included in earnings-fair value adjustment | (3,568) | (233) | 1,360
Additions | 45,263 | 26,399 | 11,463
Sales and settlements | (10,838) | (20,619) | (1,027)
Ending Balance | 49,939 | 19,082 | 13,535
Loans Repurchased from Ginnie Mae Loan Pools |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |
Beginning Balance | 0 | 0 | 0
Transfers in (out of) Level 3 | 1,088 | 0 | 0
Total gains or losses (realized/unrealized): |  |  |
Included in earnings-fair value adjustment | 0 | 0 | 0
Additions | 18,555 | 0 | 0
Sales and settlements | (1,352) | 0 | 0
Ending Balance | $ 18,291 | $ 0 | $ 0

X
- Definition Fair Value Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Fair Value Adjustment Including in Earnings + References No definition available. + Details
Name: | banc_FairValueMeasurementwithUnobservableInputsReconciliationRecurringBasisAssetFairValueAdjustmentIncludinginEarnings
Namespace Prefix: | banc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales and Settlements + References No definition available. + Details
Name: | banc_FairValueMeasurementwithUnobservableInputsReconciliationRecurringBasisAssetSalesandSettlements
Namespace Prefix: | banc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Fair Value Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Total Gains (Losses) [Abstract] + References No definition available. + Details
Name: | banc_FairValueMeasurementwithUnobservableInputsReconciliationRecurringBasisAssetTotalGainsLossesAbstract
Namespace Prefix: | banc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
Name: | us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of purchases of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
Name: | us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of transfer of financial instrument classified as an asset into (out of) level 3 of the fair value hierarchy. + References No definition available. + Details
Name: | us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
Name: | us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=us-gaap_ServicingContractsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |