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STOCKHOLDERS' EQUITY - Warrants (Details) (USD $) | 0 Months Ended | 1 Months Ended |
--- | --- | --- | ---
Nov. 01, 2010 | Nov. 30, 2010 | Mar. 31, 2015
Class of Stock [Line Items] |  |  |
Exercise price of warrants for non-voting common stock | $ 11.00 us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 |  | $ 9.22 us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Tcw Shared Opportunity Fund |  |  |
Class of Stock [Line Items] |  |  |
Warrants issued | 240,000 us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = banc_Greaterthan5ShareholderTCWShareholderMember | 240,000 us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = banc_Greaterthan5ShareholderTCWShareholderMember |
Exercise price of warrants for non-voting common stock | $ 11.00 us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = banc_Greaterthan5ShareholderTCWShareholderMember |  |
Warrant exercisable period | 5 years | 5 years |
Cor Advisors Llc |  |  |
Class of Stock [Line Items] |  |  |
Warrants issued | 1,395,000 us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights / us-gaap_CounterpartyNameAxis = banc_CorAdvisorsLlcMember |  |
Exercise price of warrants for non-voting common stock | $ 11.00 us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 / us-gaap_CounterpartyNameAxis = banc_CorAdvisorsLlcMember |  |
Cor Advisors Llc | President And Chief Executive Officer |  |  |
Class of Stock [Line Items] |  |  |
Warrants issued | 960,000 us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights / us-gaap_CounterpartyNameAxis = banc_CorAdvisorsLlcMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = banc_PresidentAndChiefExecutiveOfficerMember |  |
Cor Advisors Llc | Vice President and Chief Lending Officer |  |  |
Class of Stock [Line Items] |  |  |
Warrants issued | 435,000 us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights / us-gaap_CounterpartyNameAxis = banc_CorAdvisorsLlcMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = banc_VicePresidentandChiefLendingOfficerMember |  |

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- Definition Class of Warrant or Right, Exercisable Period + References No definition available. + Details
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- Definition Exercise price per share or per unit of warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)(4)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)(2)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph i -Subparagraph 2 -Article 4 + Details
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- Details
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