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Business Segment and Geographic Information - Revenue by Client Sector (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Business Segment and Geographic Information
Total revenue	$ 1,188,781	$ 1,076,447	$ 892,659
Operating expenses	776,208	717,619	629,304
Operating income	412,573	358,828	263,355
Institutional
Business Segment and Geographic Information
Total revenue	719,211	668,812	554,330
Wholesale
Business Segment and Geographic Information
Total revenue	273,189	254,927	185,456
Retail
Business Segment and Geographic Information
Total revenue	110,468	70,566	76,352
Market Data
Business Segment and Geographic Information
Total revenue	$ 85,913	$ 82,142	$ 76,521

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