XML 64 R54.htm IDEA: XBRL DOCUMENT v3.10.0.1

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Details) $ in Thousands	3 Months Ended				9 Months Ended
	Sep. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Sep. 30, 2017 USD ($)	Mar. 31, 2017 USD ($)	Sep. 30, 2018 USD ($) banking_office	Sep. 30, 2017 USD ($)
Accounting Policies [Abstract]
Number of banking offices | banking_office					34
Change in Accounting Estimate [Line Items]
Salaries and employee benefits	$ 24,832		$ 30,216		$ 85,387	$ 96,007
Accumulated Other Comprehensive Income (Loss) | ASU 2018-02
Change in Accounting Estimate [Line Items]
Stranded tax effects		$ 496			496
Retained Earnings | ASU 2018-02
Change in Accounting Estimate [Line Items]
Stranded tax effects		(496)			$ (496)
Reversal of Excess Accrual
Change in Accounting Estimate [Line Items]
Salaries and employee benefits		$ 937		$ 7,800

X

- Definition

Number of offices included in Nature of Operations disclosure.

+ References

No definition available.

+ Details

Name:	banc_NumberOfBankingOffices
Namespace Prefix:	banc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tax Cuts And Jobs Act Of 2017, Reclassification From AOCI To Retained Earnings, Tax Effect

+ References

No definition available.

+ Details

Name:	banc_TaxCutsAndJobsActOf2017ReclassificationFromAOCIToRetainedEarningsTaxEffect
Namespace Prefix:	banc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- References

No definition available.

+ Details

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

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

X

- Definition

Amount of expense for salary, wage, profit sharing; incentive and equity-based compensation; and other employee benefit.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(b)(4))
-URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227

+ Details

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

X

- Details

Name:	us-gaap_StatementEquityComponentsAxis=us-gaap_AccumulatedOtherComprehensiveIncomeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_AdjustmentsForNewAccountingPronouncementsAxis=banc_AccountingStandardsUpdate201802Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementEquityComponentsAxis=us-gaap_RetainedEarningsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ChangeInAccountingEstimateByTypeAxis=banc_ReversalofExcessAccrualMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: