Business Combination, Contingent Consideration, Liability, Number of Shares

No definition available.

Name:	banc_BusinessCombinationContingentConsiderationLiabilityNumberofShares
Namespace Prefix:	banc_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Related Party Transaction, Agreement Terms

+ References

No definition available.

+ Details

Name:	banc_RelatedPartyTransactionAgreementTerms
Namespace Prefix:	banc_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Related Party Transaction, Business Acquisition, Equity Interest Issued or Issuable, Number of Shares Transferred

+ References

No definition available.

+ Details

Name:	banc_RelatedPartyTransactionBusinessAcquisitionEquityInterestIssuedorIssuableNumberofSharesTransferred
Namespace Prefix:	banc_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Related Party Transaction, Employment Agreement, Purchase Price Call Option

+ References

No definition available.

+ Details

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

- Definition

Related Party Transaction, Professional Services, Monthly Payments

+ References

No definition available.

+ Details

Name:	banc_RelatedPartyTransactionProfessionalServicesMonthlyPayments
Namespace Prefix:	banc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Number of shares of equity interests issued or issuable to acquire entity.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (b)(4)

-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479

+ Details

Name:	us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of liabilities incurred by the acquirer as part of consideration transferred in a business combination.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 25

-Paragraph 5

-URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6405-128476

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 30

-Paragraph 7

-URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 30

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477

+ Details

Name:	us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Face amount or stated value per share of common stock.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.29)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 30

-Article 5

+ Details

Name:	us-gaap_CommonStockParOrStatedValuePerShare
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 13

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585

+ Details

Name:	us-gaap_PaymentsToAcquireBusinessesGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 850

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

+ Details

Name:	us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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

- Details

Name:	us-gaap_AwardTypeAxis=us-gaap_PerformanceSharesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=banc_CSFinancialMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=banc_ManagingDirectorandChiefLendingOfficerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionAxis=banc_ManagementAndServicesAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=banc_BrotherofPresidentandChiefExecutiveOfficerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=banc_SisterinLawofPresidentandChiefExecutiveOfficerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=banc_FatherofPresidentandChiefExecutiveOfficerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=banc_CertainEmployeesofAcquiredEntityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

RELATED-PARTY TRANSACTIONS - Transactions Involving Jeffrey T. Seabold (Details) - USD ($)					12 Months Ended
	Oct. 31, 2014	Oct. 31, 2013	May. 13, 2013	Dec. 27, 2012	Dec. 31, 2013
Performance Shares
Related Party Transaction [Line Items]
Number of shares		92,781
CS Financial
Related Party Transaction [Line Items]
Shares paid as merger consideration		173,791
Par value of stocks issued		$ 0.01
Cash paid for acquisition		$ 1,500,000
Earn-out liabilities		$ 3,200,000
Managing Director and Chief Lending Officer \| CS Financial
Related Party Transaction [Line Items]
Shares paid as merger consideration		103,663
Managing Director and Chief Lending Officer \| CS Financial \| Performance Shares
Related Party Transaction [Line Items]
Shares paid as merger consideration	28,545
Managing Director and Chief Lending Officer \| Management and Services Agreement
Related Party Transaction [Line Items]
Monthly compensation for services				$ 100,000
Employment agreement, term			3 years
Expenses from transactions with related parties					$ 439,000
Business acquisition, purchase price			$ 10,000,000
Brother of President and Chief Executive Officer \| CS Financial
Related Party Transaction [Line Items]
Shares paid as merger consideration		16,140
Brother of President and Chief Executive Officer \| CS Financial \| Performance Shares
Related Party Transaction [Line Items]
Shares paid as merger consideration	1,082
Sister-in-Law of President and Chief Executive Officer \| CS Financial
Related Party Transaction [Line Items]
Shares paid as merger consideration		16,140
Number of shares transferred from one related party to another related party		103,663
Sister-in-Law of President and Chief Executive Officer \| CS Financial \| Performance Shares
Related Party Transaction [Line Items]
Shares paid as merger consideration	1,082
Father of President and Chief Executive Officer \| CS Financial
Related Party Transaction [Line Items]
Shares paid as merger consideration		3,228
Father of President and Chief Executive Officer \| CS Financial \| Performance Shares
Related Party Transaction [Line Items]
Shares paid as merger consideration	216
Certain Employees of Acquired Entity \| CS Financial
Related Party Transaction [Line Items]
Shares paid as merger consideration		34,620