Federal home loan bank advances maximum borrowing capacity percentage on assets.

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FRB borrowings in one advance.

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Maximum overnight line of credit facilities available.

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Overnight line of credit facilities outstanding.

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Amount of borrowings as of the balance sheet date from the Federal Home Loan Bank, which are primarily used to cover shortages in the required reserve balance and liquidity shortages.

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Description of the frequency of periodic payments (monthly, quarterly, annual).

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The average effective interest rate during the reporting period.

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Contractual interest rate for funds borrowed, under the debt agreement.

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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.

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Amount, after accumulated amortization, of debt premium.

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Amount of unused borrowing capacity under the long-term financing arrangement that is available to the entity as of the balance sheet date.

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Principal amount outstanding of advances made and reported by Federal Home Loan Bank (FHLBank) relating to the Affordable Housing Program (AHP).

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No definition available.

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Amount of the collateral pledged in support of federal home loan bank advances outstanding.

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Federal Home Loan Bank (FHLB) stock represents an equity interest in a FHLB. It does not have a readily determinable fair value because its ownership is restricted and it lacks a market (liquidity).

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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Date the credit facility terminates, in YYYY-MM-DD format.

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Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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Date the payments are due on subordinated debt, in YYYY-MM-DD format.

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Including the current and noncurrent portions, carrying value as of the balance sheet date of subordinated debt (with initial maturities beyond one year or beyond the operating cycle if longer). Subordinated debt places a lender in a lien position behind debt having a higher priority of repayment in liquidation of the entity's assets.

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The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

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- Details

Name:	us-gaap_CollateralAxis=brbs_VirginiaPublicDepositMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Borrowings - Additional Information (Detail) - USD ($)	12 Months Ended
Borrowings - Additional Information (Detail) - USD ($)	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Oct. 31, 2019	May 31, 2015
Debt Instrument [Line Items]
Federal home loan bank advance	$ 210,000,000	$ 311,700,000
Federal home loan bank stock	12,300,000	14,700,000
Subordinated notes, net	39,855,000	39,920,000
Subordinated debt [Member]
Debt Instrument [Line Items]
Subordinated notes, net	$ 39,900,000	$ 39,900,000
Subordinated debt [Member] \| 2030 Notes [Member]
Debt Instrument [Line Items]
Subordinated debt instrument maturity date	Jun. 01, 2030
Subordinated notes, net					$ 15,000,000
Stated Interest Rate	6.00%
Debt instrument, frequency of periodic payment	semi-annually
Effective interest rate	6.09%	6.11%	6.12%
Unamortized debt issuance cost	$ 14,800,000	$ 14,700,000
Subordinated debt [Member] \| 2030 Notes [Member] \| SOFR [Member]
Debt Instrument [Line Items]
Subordinated debt instrument variable interest rate spread	5.87%
Subordinated debt [Member] \| 2029 Bay Banks Notes [Member]
Debt Instrument [Line Items]
Stated Interest Rate	5.625%
Debt instrument, frequency of periodic payment	semi-annually
Subordinated debt [Member] \| 2029 Bay Banks Notes [Member] \| SOFR [Member]
Debt Instrument [Line Items]
Subordinated debt instrument variable interest rate spread	4.335%
Subordinated debt [Member] \| 2029 Notes [Member]
Debt Instrument [Line Items]
Subordinated debt instrument maturity date	Oct. 15, 2029
Subordinated notes, net				$ 25,000,000
Debt instrument carrying amount	$ 25,100,000
Debt Instrument, Unamortized Premium	$ 578,000
Effective interest rate	5.08%	5.08%	4.73%
Federal Reserve Board Bank Term Funding Program [Member]
Debt Instrument [Line Items]
Borrowings avalible through BTFP	$ 260,900,000
FRB Borrowings one advance	$ 65,000,000
Maturity date of FRB borrowings	May 10, 2024
Stated Interest Rate	4.74%
Borrowings available through discount window	$ 161,000,000
Advance from federal reserve bank	0
Unsecured Lines of Credit [Member]
Debt Instrument [Line Items]
Maximum overnight line of credit facilities available	10,000,000	$ 28,000,000
Overnight line of credit facilities outstanding	$ 0	0
FHLB [Member]
Debt Instrument [Line Items]
Federal home loan bank advances, maximum borrowing capacity percentage on assets	30.00%
Line of creidt	$ 455,600,000	525,100,000
Federal home loan bank advance	210,000,000	311,700,000
FHLB [Member] \| Restricted Equity Investments [Member]
Debt Instrument [Line Items]
Federal home loan bank stock	12,300,000	14,700,000
FHLB [Member] \| Line of Credit [Member]
Debt Instrument [Line Items]
Federal home loan bank advance	135,500,000	128,300,000
FHLB [Member] \| Line of Credit [Member] \| 1-4 Family Residential Loans [Member]
Debt Instrument [Line Items]
Assets pledged with federal home loan bank against credit facilities	237,500,000
FHLB [Member] \| Line of Credit [Member] \| Multi-Family Residential Loans [Member]
Debt Instrument [Line Items]
Assets pledged with federal home loan bank against credit facilities	36,600,000
FHLB [Member] \| Line of Credit [Member] \| Commercial Real Estate Loans [Member]
Debt Instrument [Line Items]
Assets pledged with federal home loan bank against credit facilities	151,600,000
FHLB [Member] \| Line of Credit [Member] \| Securities [Member]
Debt Instrument [Line Items]
Assets pledged with federal home loan bank against credit facilities	29,700,000
FHLB [Member] \| Line of Credit [Member] \| Public Deposits with Treasury Board of Virginia [Member]
Debt Instrument [Line Items]
Assets pledged with federal home loan bank against credit facilities	$ 110,100,000	$ 85,100,000