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Revenue from Contracts with Customers - Disaggregation of Revenue by Asset Class (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Disaggregation of Revenue [Line Items]
Total Revenue	$ 396,371	$ 382,189
Money market
Disaggregation of Revenue [Line Items]
Total Revenue	202,640	179,536
Equity
Disaggregation of Revenue [Line Items]
Total Revenue	116,515	124,653
Fixed-income
Disaggregation of Revenue [Line Items]
Total Revenue	48,675	47,890
Other
Disaggregation of Revenue [Line Items]
Total Revenue	$ 28,541	$ 30,110

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