Investments - Summary of Investments (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Summary of Investment Holdings [Line Items]
Investments owned	$ 243,554	$ 217,518
Seed capital
Summary of Investment Holdings [Line Items]
Investments owned	394,200	309,600
Equity securities: | Long-term incentive compensation-related
Summary of Investment Holdings [Line Items]
Investments owned	18,882	21,055
Equity securities: | Seed capital
Summary of Investment Holdings [Line Items]
Investments owned	128,771	138,012
Investments in limited partnership hedge funds: | Long-term incentive compensation-related
Summary of Investment Holdings [Line Items]
Investments owned	21,151	26,815
Investments in limited partnership hedge funds: | Seed capital
Summary of Investment Holdings [Line Items]
Investments owned	57,624	15,711
Time deposits
Summary of Investment Holdings [Line Items]
Investments owned	6,517	7,750
Other
Summary of Investment Holdings [Line Items]
Investments owned	$ 10,609	$ 8,175