XML 76 R56.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Fair Value - Summary of other real estate owned measured on nonrecurring basis valuation techniques (Detail) - Fair Value, Nonrecurring [Member] - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2019 | Dec. 31, 2018
Disclosure of Other Real Estate Owned Measured on Nonrecurring Vasis Valuation Techniques [Line Items] |  |
Other real estate owned, fair value |  | $ 134
Other real estate owned, valuation technique | Discounted appraised value | Discounted appraised value
Other real estate owned, significant unobservable inputs | Discounted for selling costs | Discounted for selling costs
Minimum [Member] | Measurement Input, Discount Rate [Member] |  |
Disclosure of Other Real Estate Owned Measured on Nonrecurring Vasis Valuation Techniques [Line Items] |  |
Other real estate owned, range |  | 15.00%
Maximum [Member] | Measurement Input, Discount Rate [Member] |  |
Disclosure of Other Real Estate Owned Measured on Nonrecurring Vasis Valuation Techniques [Line Items] |  |
Other real estate owned, range |  | 35.00%

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

X
- Definition Other real estate owned fair value disclosures. + References No definition available. + Details
Name: | brbs_OtherRealEstateOwnedFairValueDisclosure
Namespace Prefix: | brbs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Other real estate owned range. + References No definition available. + Details
Name: | brbs_OtherRealEstateOwnedRange
Namespace Prefix: | brbs_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Other real estate owned significant unobservable inputs. + References No definition available. + Details
Name: | brbs_OtherRealEstateOwnedSignificantUnobservableInputs
Namespace Prefix: | brbs_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Other real estate owned valuation technique. + References No definition available. + Details
Name: | brbs_OtherRealEstateOwnedValuationTechnique
Namespace Prefix: | brbs_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsNonrecurringMember
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_MeasurementInputTypeAxis=us-gaap_MeasurementInputDiscountRateMember
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: |