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Revenue from Contracts with Customers - Disaggregation of Revenue by Asset Class (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Disaggregation of Revenue [Line Items]
Total Revenue	$ 402,583	$ 433,232	$ 798,954	$ 815,421
Money market
Disaggregation of Revenue [Line Items]
Total Revenue	207,389	193,326	410,029	372,862
Equity
Disaggregation of Revenue [Line Items]
Total Revenue	115,742	123,266	232,257	247,918
Fixed-income
Disaggregation of Revenue [Line Items]
Total Revenue	48,616	47,436	97,291	95,327
Other
Disaggregation of Revenue [Line Items]
Total Revenue	$ 30,836	$ 69,204	$ 59,377	$ 99,314

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