XML 82 R71.htm IDEA: XBRL DOCUMENT
v3.24.2.u1

Fair Value Measurement - Nonrecurring (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023 | Dec. 31, 2023
Balances of the assets and liabilities measured at fair value on a nonrecurring basis |  |  |  |  |
Loss | $ 600 | $ 550 | $ 1,450 | $ 2,050 |
Nonrecurring |  |  |  |  |
Balances of the assets and liabilities measured at fair value on a nonrecurring basis |  |  |  |  |
Loss |  |  | 245 |  | $ 199
Nonrecurring | Individually Evaluated Loans |  |  |  |  |
Balances of the assets and liabilities measured at fair value on a nonrecurring basis |  |  |  |  |
Loss |  |  | 245 |  | 199
Level 3 | Nonrecurring |  |  |  |  |
Balances of the assets and liabilities measured at fair value on a nonrecurring basis |  |  |  |  |
Assets measured at fair value | 9,287 |  | 9,287 |  | 9,602
Level 3 | Nonrecurring | Individually Evaluated Loans |  |  |  |  |
Balances of the assets and liabilities measured at fair value on a nonrecurring basis |  |  |  |  |
Assets measured at fair value | $ 9,287 |  | $ 9,287 |  | $ 9,602
Level 3 | Nonrecurring | Individually Evaluated Loans | Minimum |  |  |  |  |
Balances of the assets and liabilities measured at fair value on a nonrecurring basis |  |  |  |  |
Customized discounting criteria on appraisals (as a percent) |  |  | 3.00% |  |
Level 3 | Nonrecurring | Individually Evaluated Loans | Maximum |  |  |  |  |
Balances of the assets and liabilities measured at fair value on a nonrecurring basis |  |  |  |  |
Customized discounting criteria on appraisals (as a percent) |  |  | 15.00% |  |

X
- Definition The fair value input for estimating collateral value. + References No definition available. + Details
Name: | bwb_FairValueAssetsMeasuredOnNonrecurringBasisObservableInputDiscountingCriteriaPercentage
Namespace Prefix: | bwb_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fair value portion of asset recognized for present right to economic benefit. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 100 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-100 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
Name: | us-gaap_AssetsFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Definition Amount of credit loss expense (reversal of expense) for financing receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-13 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(11)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478524/942-220-S99-1 + Details
Name: | us-gaap_ProvisionForLoanLossesExpensed
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsNonrecurringMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=bwb_IndividuallyEvaluatedLoansMember
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: | srt_RangeAxis=srt_MinimumMember
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: |