XML 51 R41.htm IDEA: XBRL DOCUMENT v3.24.2.u1

LOANS RECEIVABLE AND THE ALLOWANCE FOR CREDIT LOSSES (Financing Receivable, Loan Modification, Financial Effect) (Details)	Jun. 30, 2023 Months
One- to four- family construction | Extended Maturity
Financing Receivable, Loan Modification, Financial Effect [Line Items]
Financing Receivable, Modified, Weighted Average Term Increase in Months	7

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:	instant

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: