XML 65 R50.htm IDEA: XBRL DOCUMENT
v3.24.0.1

BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Investment in FHLB Stock) (Details) | Dec. 31, 2023 $ / shares
--- | ---
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Federal Home Loan Bank Stock, Par Value Per Share | $ 100

X
- Definition Federal Home Loan Bank Stock, Par Value Per Share + References No definition available. + Details
Name: | banr_FederalHomeLoanBankStockParValuePerShare
Namespace Prefix: | banr_
Data Type: | dtr-types1:perShareItemType
Balance Type: | na
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration