Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Revenues
Revenues	$ 186,057	$ 195,464
Expenses
Employee compensation and benefits	47,756	48,088
Depreciation and amortization	15,174	11,779
Technology and communications	12,192	10,036
Professional and consulting fees	9,621	9,640
Occupancy	3,387	3,317
Marketing and advertising	1,789	1,204
Clearing costs	4,575	4,694
General and administrative	3,459	3,232
Total expenses	97,953	91,990
Operating income	88,104	103,474
Other income (expense)
Investment income	59	107
Interest expense	(173)	(191)
Other, net	2,429	(1,589)
Total other income (expense)	2,315	(1,673)
Income before income taxes	90,419	101,801
Provision for income taxes	25,650	21,344
Net income	$ 64,769	$ 80,457
Net income per common share
Basic	$ 1.73	$ 2.15
Diluted	1.71	2.11
Cash dividends declared per common share	$ 0.70	$ 0.66
Weighted average shares outstanding
Basic	37,384	37,470
Diluted	37,824	38,155
Commissions [Member]
Revenues
Revenues	$ 166,113	$ 175,838
Information Services [Member]
Revenues
Revenues	9,809	9,162
Post-trade Services [Member]
Revenues
Revenues	9,912	10,261
Other [Member]
Revenues
Revenues	$ 223	$ 203