XML 106 R69.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Loans and Leases (Details)	12 Months Ended
	Dec. 31, 2019
Loans and Leases Receivable Disclosure [Line Items]
Threshold period past due for nonperforming status of financing receivables	90 days
Single family residential mortgage
Loans and Leases Receivable Disclosure [Line Items]
Threshold period past due for write-off of financing receivable	180 days
Commercial and industrial
Loans and Leases Receivable Disclosure [Line Items]
Threshold period past due for write-off of financing receivable	90 days
Consumer loans
Loans and Leases Receivable Disclosure [Line Items]
Threshold period past due for write-off of financing receivable	120 days

X

- Definition

Threshold Period Past Due for Nonperforming Status of Financing Receivables

+ References

No definition available.

+ Details

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

X

- Definition

Threshold period for when financing receivable is considered past due to write off as uncollectible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 14
-URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919253-210447

+ Details

Name:	us-gaap_FinancingReceivableThresholdPeriodPastDueWriteoff
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

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

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=banc_ConsumerSingleFamilyResidentialMortgageReceivableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=banc_CommercialandIndustrialReceivableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ConsumerLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: