XML 55 R45.htm IDEA: XBRL DOCUMENT
v3.21.1

Business Combinations - Summary of Estimated Fair Value Adjustments of Consideration Paid, Acquired Asset and Assumed Liabilities (Parenthetical) (Detail) - USD ($) |  |  | 1 Months Ended | 3 Months Ended
--- | --- | --- | --- | ---
Apr. 30, 2021 | Mar. 17, 2021 | Jan. 31, 2021 | Mar. 31, 2021
Business Acquisition [Line Items] |  |  |  |
Stock split description |  | On March 17, 2021, the Company announced that its board of directors had approved a three-for-two stock split (“Stock Split”) effected in the form of a 50% stock dividend on its common stock outstanding paid on April 30, 2021 to shareholders of record as of April 20, 2021. |  |
Statutory federal tax rate |  |  |  | 21.00%
Subsequent Event [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Stock split description | 3-for-2 stock split |  |  |
Bay Banks [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Statutory federal tax rate |  |  | 21.00% |
FHLB advance assumed |  |  | $ 10,124,000 |
Bay Banks [Member] | Time Deposits [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Fair value adjustment (premium) |  |  | 5,800,000 |
Bay Banks [Member] | FHLB [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Fair value adjustment (premium) |  |  | 124,000 |
Bay Banks [Member] | Subordinated Notes [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Fair value adjustment (premium) |  |  | 950,000 |
Bay Banks [Member] | Core Deposits [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Fair value adjustment (premium) |  |  | 100,000 |
Bay Banks [Member] | Premises and Equipment [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Fair value adjustment (premium) |  |  | 4,400,000 |
Bay Banks [Member] | Deferred Tax Asset, Net [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Fair value adjustment (premium) |  |  | 2,100,000 |
Bay Banks [Member] | Core Deposits Intangible [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Fair value adjustment (premium) |  |  | 203,000 |
Bay Banks [Member] | Loan Held for Investment [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Fair value adjustment (premium) |  |  | $ 17,900,000 |
Fair value adjustment percentage |  |  | 1.70% |
Bay Banks [Member] | Subsequent Event [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Stock split description | Common shares issued and purchase price per share are presented on a post Stock Split basis, which was effective April 30, 2021. |  |  |

X
- Definition Asset fair value adjustment percentage. + References No definition available. + Details
Name: | brbs_AssetFairValueAdjustmentPercentage
Namespace Prefix: | brbs_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Business combination recognized identifiable assets acquired and liabilities assumed FHLB borrowings. + References No definition available. + Details
Name: | brbs_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFHLBBorrowings
Namespace Prefix: | brbs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of addition (reduction) to the amount at which an asset could be incurred (settled) in a current transaction between willing parties. + References No definition available. + Details
Name: | us-gaap_AssetsFairValueAdjustment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

X
- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
Name: | us-gaap_EffectiveIncomeTaxRateContinuingOperations
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of addition (reduction) to the amount at which a liability could be incurred (settled) in a current transaction between willing parties. + References No definition available. + Details
Name: | us-gaap_LiabilitiesFairValueAdjustment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Description of the stock split arrangement. Also provide the retroactive effect given by a stock split that occurs after the balance date but before the release of financial statements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SAB Topic 4.C) -URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187143-122770 + Details
Name: | us-gaap_StockholdersEquityNoteStockSplit
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=brbs_BayBanksOfVirginiaIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_CoreDepositsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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

X
- Details
Name: | us-gaap_InvestmentTypeAxis=brbs_LoanHeldForInvestmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |