Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 16,560	$ (9,196)
Other comprehensive income (loss):
Change in cumulative translation adjustment	866	(488)
Other comprehensive income (loss), net of tax	866	(488)
Total comprehensive income (loss)	17,426	(9,684)
Comprehensive (loss) income attributable to noncontrolling interests and redeemable noncontrolling interests	(449)	866
Comprehensive income (loss) attributable to B. Riley Financial, Inc.	$ 17,875	$ (10,550)