Investments - Summary of Investments (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Summary of Investment Holdings [Line Items]
Investments owned	$ 524,772	$ 243,554
Equity securities
Summary of Investment Holdings [Line Items]
Investments owned	42	0
Time deposits
Summary of Investment Holdings [Line Items]
Investments owned	6,165	6,517
Other
Summary of Investment Holdings [Line Items]
Investments owned	10,946	10,609
Long-term incentive compensation-related | Equity securities
Summary of Investment Holdings [Line Items]
Investments owned	25,321	18,882
Long-term incentive compensation-related | Investments in limited partnership hedge funds
Summary of Investment Holdings [Line Items]
Investments owned	10,267	21,151
Seed capital
Summary of Investment Holdings [Line Items]
Investments owned	327,100	394,200
Seed capital | Equity securities
Summary of Investment Holdings [Line Items]
Investments owned	158,523	128,771
Seed capital | Investments in limited partnership hedge funds
Summary of Investment Holdings [Line Items]
Investments owned	18,129	57,624
Investment in joint ventures
Summary of Investment Holdings [Line Items]
Investments owned	$ 295,379	$ 0