Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Revenues:
Commissions	$ 377,288	$ 356,664
Principal transactions	114,929	115,601
Fees from related parties	3,957	3,317
Data, software and post-trade	27,122	24,127
Interest and dividend income	5,315	2,435
Other revenues	4,256	4,320
Total revenues	532,867	506,464
Expenses:
Compensation and employee benefits	267,214	257,268
Equity-based compensation and allocations of net income to limited partnership units and FPUs	81,373	57,876
Total compensation and employee benefits	348,587	315,144
Occupancy and equipment	41,165	38,663
Fees to related parties	8,440	5,725
Professional and consulting fees	15,701	15,631
Communications	27,939	27,891
Selling and promotion	14,616	10,938
Commissions and floor brokerage	15,265	17,343
Interest expense	15,742	14,303
Other expenses	12,508	17,775
Total expenses	499,963	463,413
Other income (losses), net:
Gains (losses) on equity method investments	2,062	2,803
Other income (loss)	(1,735)	(496)
Total other income (losses), net	327	2,307
Income (loss) from operations before income taxes	33,231	45,358
Provision (benefit) for income taxes	12,061	14,657
Consolidated net income (loss)	21,170	30,701
Less: Net income (loss) attributable to noncontrolling interest in subsidiaries	2,192	4,729
Net income (loss) available to common stockholders	18,978	25,972
Basic earnings (loss) per share
Net income (loss) available to common stockholders	$ 18,978	$ 25,972
Basic earnings (loss) per share (in dollars per share)	$ 0.05	$ 0.07
Basic weighted-average shares of common stock outstanding (in shares)	375,220	368,323
Fully diluted earnings (loss) per share
Net income (loss) for fully diluted shares	$ 24,155	$ 33,638
Fully diluted earnings (loss) per share (in dollars per share)	$ 0.05	$ 0.07
Fully diluted weighted-average shares of common stock outstanding (in shares)	501,067	502,877