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Supplemental Balance Sheet Information - Accrued Liabilities Narrative (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Deferred purchase incentive, current	$ 2,506	$ 2,506
Deferred purchase incentive, noncurrent	$ 5,944

X

- Definition

Accrued Deferred Purchase Incentive, Current

+ References

No definition available.

+ Details

Name:	brrc_AccruedDeferredPurchaseIncentiveCurrent
Namespace Prefix:	brrc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Accrued Deferred Purchase Incentive, Noncurrent

+ References

No definition available.

+ Details

Name:	brrc_AccruedDeferredPurchaseIncentiveNoncurrent
Namespace Prefix:	brrc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- References

No definition available.

+ Details

Name:	us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration