XML 66 R56.htm IDEA: XBRL DOCUMENT
v3.25.3

FAIR VALUE OF FINANCIAL INSTRUMENTS (Valuation Technique) (Details) - Fair Value, Inputs, Level 3 [Member] | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2025 | Dec. 31, 2024
Junior Subordinated Debt [Member] | Weighted Average [Member] | Discounted cash flows [Member] |  |
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items] |  |
Fair Value Input, Discount Rate | 7.74% | 9.57%
Corporate Bonds (TPS securities) [Member] | Weighted Average [Member] | Discounted cash flows [Member] |  |
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items] |  |
Fair Value Input, Discount Rate | 7.74% | 9.57%
Financing Receivable | Maximum [Member] | Valuation, Market Approach |  |
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items] |  |
Fair Value Input, Discount to Appraised Value | 50.00% | 75.00%
Financing Receivable | Minimum [Member] | Valuation, Market Approach |  |
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items] |  |
Fair Value Input, Discount to Appraised Value | 0.00% | 0.00%
Interest Rate Lock Commitments [Member] | Weighted Average [Member] | Valuation, Pricing Model [Member] |  |
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items] |  |
Fair Value Input, Pull-Through Rate | 90.11% | 92.34%
SBA Servicing Rights | Weighted Average [Member] | Discounted cash flows [Member] |  |
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items] |  |
Fair Value Input, Constant Prepayment Rate | 17.78% | 18.85%

X
- Definition Fair Value Input, Constant Prepayment Rate + References No definition available. + Details
Name: | banr_FairValueInputConstantPrepaymentRate
Namespace Prefix: | banr_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fair Value Input, Discount Rate + References No definition available. + Details
Name: | banr_FairValueInputDiscountRate
Namespace Prefix: | banr_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fair Value Input, Discount to Appraised Value + References No definition available. + Details
Name: | banr_FairValueInputDiscountToAppraisedValue
Namespace Prefix: | banr_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fair Value Input, Pull-Through Rate + References No definition available. + Details
Name: | banr_FairValueInputPullThroughRate
Namespace Prefix: | banr_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition [Line Items] for Fair Value Inputs, Assets and Liabilities, Quantitative Information [Table] + References No definition available. + Details
Name: | banr_FairValueInputsAssetsAndLiabilitiesQuantitativeInformationLineItems
Namespace Prefix: | banr_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FairValueByLiabilityClassAxis=us-gaap_JuniorSubordinatedDebtMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_WeightedAverageMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ValuationTechniqueAxis=us-gaap_IncomeApproachValuationTechniqueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=banr_TrustPreferredSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=us-gaap_FinanceReceivablesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ValuationTechniqueAxis=us-gaap_MarketApproachValuationTechniqueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=us-gaap_InterestRateLockCommitmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ValuationTechniqueAxis=banr_ValuationPricingModelMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=banr_SBAServicingRightsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |