XML 134 R69.htm IDEA: XBRL DOCUMENT v3.3.0.814

LOANS AND LEASES AND ALLOWANCE FOR LOAN AND LEASE LOSSES - Non Traditional Mortgages Portfolio (Detail) $ in Thousands			9 Months Ended	12 Months Ended
	Sep. 30, 2015 USD ($) Loan	Jun. 30, 2015 Loan	Sep. 30, 2015 USD ($) Loan	Dec. 31, 2014 USD ($) Loan	Sep. 30, 2014 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount	$ 4,730,077		$ 4,730,077	$ 3,949,122	$ 2,712,068
Loan Portfolio | Loan Portfolio Concentration Risk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk percentage			100.00%	100.00%
Non-Traditional Mortgages (NTM)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Count | Loan			692	407
Amount	759,278		$ 759,278	$ 350,575
Non-Traditional Mortgages (NTM) | Nontraditional Mortgage Loans Portfolio | Loan Portfolio Concentration Risk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk percentage			100.00%	100.00%
Non-Traditional Mortgages (NTM) | Loan Portfolio | Loan Portfolio Concentration Risk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk percentage			16.10%	8.90%
Non-Traditional Mortgages (NTM) | Green Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount	116,800		$ 116,800	$ 128,200
Non-Traditional Mortgages (NTM) | Interest Only Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount	630,500		630,500	209,300
Non-Traditional Mortgages (NTM) | Negative amortization
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount	12,000		$ 12,000	$ 13,100
Non-Traditional Mortgages (NTM) | First lien
Accounts, Notes, Loans and Financing Receivable [Line Items]
Count | Loan			675	387
Amount	$ 754,484		$ 754,484	$ 345,483
Non-Traditional Mortgages (NTM) | First lien | Nontraditional Mortgage Loans Portfolio | Loan Portfolio Concentration Risk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk percentage			99.30%	98.50%
Non-Traditional Mortgages (NTM) | First lien | Green Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Count | Loan	135	135	135	148
Amount	$ 112,074		$ 112,074	$ 123,177
Non-Traditional Mortgages (NTM) | First lien | Green Loans | Nontraditional Mortgage Loans Portfolio | Loan Portfolio Concentration Risk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk percentage			14.80%	35.10%
Non-Traditional Mortgages (NTM) | First lien | Interest Only Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Count | Loan			509	207
Amount	630,420		$ 630,420	$ 209,207
Non-Traditional Mortgages (NTM) | First lien | Interest Only Loans | Nontraditional Mortgage Loans Portfolio | Loan Portfolio Concentration Risk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk percentage			82.90%	59.70%
Non-Traditional Mortgages (NTM) | First lien | Negative amortization
Accounts, Notes, Loans and Financing Receivable [Line Items]
Count | Loan			31	32
Amount	11,990		$ 11,990	$ 13,099
Non-Traditional Mortgages (NTM) | First lien | Negative amortization | Nontraditional Mortgage Loans Portfolio | Loan Portfolio Concentration Risk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk percentage			1.60%	3.70%
Non-Traditional Mortgages (NTM) | Second lien
Accounts, Notes, Loans and Financing Receivable [Line Items]
Count | Loan			17	20
Amount	4,794		$ 4,794	$ 5,092
Non-Traditional Mortgages (NTM) | Second lien | Nontraditional Mortgage Loans Portfolio | Loan Portfolio Concentration Risk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk percentage			0.70%	1.50%
Non-Traditional Mortgages (NTM) | Second lien | Green Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Count | Loan			16	19
Amount	4,681		$ 4,681	$ 4,979
Non-Traditional Mortgages (NTM) | Second lien | Green Loans | Nontraditional Mortgage Loans Portfolio | Loan Portfolio Concentration Risk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk percentage			0.60%	1.40%
Non-Traditional Mortgages (NTM) | Second lien | Interest Only Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Count | Loan			1	1
Amount	$ 113		$ 113	$ 113
Non-Traditional Mortgages (NTM) | Second lien | Interest Only Loans | Nontraditional Mortgage Loans Portfolio | Loan Portfolio Concentration Risk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk percentage			0.10%	0.10%

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

X

- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 275



-SubTopic 10



-Section 50



-Paragraph 18



-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592



Reference 2: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 825



-SubTopic 10



-Section 50



-Paragraph 20



-URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13531-108611



Reference 3: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 275



-SubTopic 10



-Section 50



-Paragraph 20



-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592



Reference 4: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 825



-SubTopic 10



-Section 50



-Paragraph 21



-Subparagraph (a)



-URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13537-108611

+ Details

Name:	us-gaap_ConcentrationRiskPercentage1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 310



-SubTopic 10



-Section 45



-Paragraph 2



-URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4428-111522

+ Details

Name:	us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Indicates the number of mortgages under each classification.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 948



-SubTopic 310



-Section S99



-Paragraph 1



-Subparagraph (SX 210.12-29.3)



-URI http://asc.fasb.org/extlink&oid=6589523&loc=d3e617274-123014



Reference 2: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 205



-SubTopic 10



-Section S99



-Paragraph 6



-Subparagraph (SX 210.5-04.(c) Schedule IV)



-URI http://asc.fasb.org/extlink&oid=27047687&loc=d3e5864-122674



Reference 3: http://www.xbrl.org/2003/role/presentationRef



-Publisher SEC



-Name Regulation S-X (SX)



-Number 210



-Section 29



-Paragraph 3



-Article 12



Reference 4: http://www.xbrl.org/2003/role/presentationRef



-Publisher SEC



-Name Regulation S-X (SX)



-Number 210



-Section 04



-Paragraph c



-Subparagraph Schedule IV



-Article 5

+ Details

Name:	us-gaap_MortgageLoansOnRealEstateNumberOfLoans
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_ConcentrationRiskByBenchmarkAxis=banc_LoanPortfolioMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ConcentrationRiskByTypeAxis=banc_LoanPortfolioConcentrationRiskMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	banc_FinancingReceivablePortfolioSegmentAxis=banc_NonTraditionalMortgagesLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ConcentrationRiskByBenchmarkAxis=banc_NontraditionalMortgageLoansPortfolioMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ProductOrServiceAxis=banc_GreenLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ProductOrServiceAxis=banc_InterestOnlyLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ProductOrServiceAxis=banc_NegativeAmortizationLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis=us-gaap_FirstMortgageMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis=us-gaap_SecondMortgageMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: