Earning Per Share - Summary of Computation of Basic and Diluted EPS (Detail) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Earnings Per Share [Abstract]
Net income		$ 6,806	$ 5,059	$ 39,685	$ 12,117
Net loss (income) attributable to noncontrolling interest		4	4	(1)	(1)
Net income (loss) attributable to Blue Ridge Bankshares, Inc.		$ 6,810	$ 5,063	$ 39,684	$ 12,116
Weighted average common shares outstanding, basic		18,776,014	8,577,932	17,526,055	8,521,395
Effect of dilutive securities		22,711		9,341
Weighted average common shares outstanding, dilutive		18,798,725	8,577,932	17,535,396	8,521,395
Basic and Diluted earnings per common share	[1]	$ 0.36	$ 0.59	$ 2.26	$ 1.42

[1] EPS has been adjusted for all periods presented to reflect the Company’s 3-for-2 stock split effective April 30, 2021.