Revenue from Contracts with Customers - Disaggregation of Revenue by Asset Class (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disaggregation of Revenue [Line Items]
Total Revenue	$ 1,609,574	$ 1,445,814	$ 1,300,447
Money market
Disaggregation of Revenue [Line Items]
Total Revenue	754,074	575,261	239,318
Equity
Disaggregation of Revenue [Line Items]
Total Revenue	483,650	526,957	677,917
Fixed-income
Disaggregation of Revenue [Line Items]
Total Revenue	189,280	206,794	237,702
Other
Disaggregation of Revenue [Line Items]
Total Revenue	$ 182,570	$ 136,802	$ 145,510