XML 51 R41.htm IDEA: XBRL DOCUMENT v3.24.3

LOANS RECEIVABLE AND THE ALLOWANCE FOR CREDIT LOSSES (Financing Receivable, Loan Modification, Financial Effect) (Details) - Months	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
One- to four- family construction | Extended Maturity
Financing Receivable, Loan Modification, Financial Effect [Line Items]
Financing Receivable, Modified, Weighted Average Term Increase in Months		11
Commercial Business | Payment Deferral
Financing Receivable, Loan Modification, Financial Effect [Line Items]
Financing Receivable, Modified, Weighted Average Term Increase from Modification	3 months	8 months
Agricultural Business | Payment Deferral
Financing Receivable, Loan Modification, Financial Effect [Line Items]
Financing Receivable, Modified, Weighted Average Term Increase from Modification		8 months
One- to Four-Family Residential | Payment Deferral
Financing Receivable, Loan Modification, Financial Effect [Line Items]
Financing Receivable, Modified, Weighted Average Term Increase from Modification		8 months

X

- Definition

Financing Receivable, Loan Modification, Financial Effect [Line Items]

+ References

No definition available.

+ Details

Name:	banr_FinancingReceivableLoanModificationFinancialEffectLineItems
Namespace Prefix:	banr_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Financing Receivable, Modified, Weighted Average Term Increase in Months

+ References

No definition available.

+ Details

Name:	banr_FinancingReceivableModifiedWeightedAverageTermIncreaseInMonths
Namespace Prefix:	banr_
Data Type:	xbrli:intItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Period of increase in weighted average maturity of financing receivable modified for debtor experiencing financial difficulty, 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/2003/role/exampleRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 12A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481933/310-10-55-12A

+ Details

Name:	us-gaap_FinancingReceivableModifiedWeightedAverageTermIncreaseFromModification
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Details

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

X

- Details

Name:	us-gaap_LoanRestructuringModificationAxis=us-gaap_ExtendedMaturityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

Name:	us-gaap_LoanRestructuringModificationAxis=us-gaap_PaymentDeferralMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

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