XML 50 R41.htm IDEA: XBRL DOCUMENT
v3.22.2.2

SECURITIES (Debt Securities, Held-to-Maturity, Credit Rating) (Details) - USD ($) $ in Thousands | Sep. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Debt securities, held-to-maturity | $ 1,133,246 | $ 521,355
Credit Rating, Not Credit Rated |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Debt securities, held-to-maturity | 619,748 | 114,492
U.S. Government and agency obligations |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Debt securities, held-to-maturity | 312 | 316
U.S. Government and agency obligations | Credit Rating, Not Credit Rated |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Debt securities, held-to-maturity | 312 | 316
Municipal bonds |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Debt securities, held-to-maturity | 508,002 | 420,555
Municipal bonds | Credit Rating, Not Credit Rated |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Debt securities, held-to-maturity | 11,735 | 14,192
Corporate bonds |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Debt securities, held-to-maturity | 2,994 | 3,092
Corporate bonds | Credit Rating, Not Credit Rated |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Debt securities, held-to-maturity | 2,494 | 2,592
Mortgage-backed or related securities |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Debt securities, held-to-maturity | 621,938 | 97,392
Mortgage-backed or related securities | Credit Rating, Not Credit Rated |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Debt securities, held-to-maturity | 605,207 | 97,392
Standard & Poor's, AAA to A Rating |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Debt securities, held-to-maturity | 513,498 | 406,863
Standard & Poor's, AAA to A Rating | U.S. Government and agency obligations |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Debt securities, held-to-maturity | 0 | 0
Standard & Poor's, AAA to A Rating | Municipal bonds |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Debt securities, held-to-maturity | 496,267 | 406,363
Standard & Poor's, AAA to A Rating | Corporate bonds |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Debt securities, held-to-maturity | 500 | 500
Standard & Poor's, AAA to A Rating | Mortgage-backed or related securities |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Debt securities, held-to-maturity | $ 16,731 | $ 0

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

X
- Definition Amount, before allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 14 -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919253-210447 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953401-111524 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27232-111563 + Details
Name: | us-gaap_HeldToMaturitySecurities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | banr_CreditRatingNotCreditRatedAxis=banr_CreditRatingNotCreditRatedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_USTreasuryAndGovernmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_MunicipalBondsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_CorporateBondSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_MortgageBackedSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CreditRatingStandardPoorsAxis=banr_StandardPoorsAAAtoARatingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |