Condensed Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenues:
Services and fees	$ 144,823	$ 113,111	$ 429,799	$ 356,975
Trading income (loss) and fair value adjustments on loans	31,753	40,268	(36,142)	71,730
Interest income - Loans and securities lending	26,026	25,766	72,383	54,147
Sale of goods	23,651	918	26,475	4,023
Total revenues	226,253	180,063	492,515	486,875
Operating expenses:
Direct cost of services	23,264	7,936	51,201	41,715
Cost of goods sold	9,813	911	11,442	3,835
Selling, general and administrative expenses	97,143	101,092	291,449	287,963
Restructuring charge	1,557		1,557	1,699
Impairment of tradenames			12,500
Interest expense - Securities lending and loan participations sold	10,975	10,273	30,669	22,579
Total operating expenses	142,752	120,212	398,818	357,791
Operating income	83,501	59,851	93,697	129,084
Other income (expense):
Interest income	67	361	537	1,329
Income (loss) from equity investments	409	1,113	(145)	(4,049)
Interest expense	(16,374)	(12,772)	(48,537)	(35,130)
Income before income taxes	67,603	48,553	45,552	91,234
Provision for income taxes	(18,711)	(14,409)	(13,380)	(26,802)
Net income	48,892	34,144	32,172	64,432
Net income (loss) attributable to noncontrolling interests	513	(158)	(1,382)	(50)
Net income attributable to B. Riley Financial, Inc.	48,379	34,302	33,554	64,482
Preferred stock dividends	1,088		3,230
Net income available to common shareholders	$ 47,291	$ 34,302	$ 30,324	$ 64,482
Basic income per common share (in Dollars per share)	$ 1.86	$ 1.29	$ 1.18	$ 2.45
Diluted income per common share (in Dollars per share)	$ 1.75	$ 1.21	$ 1.14	$ 2.37
Weighted average basic common shares outstanding (in Shares)	25,446,292	26,556,223	25,699,735	26,351,839
Weighted average diluted common shares outstanding (in Shares)	27,050,448	28,233,423	26,689,700	27,251,837