Investments - Summary of Investments (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Summary of Investment Holdings [Line Items]
Investments owned	$ 531,013	$ 535,204
Seed capital
Summary of Investment Holdings [Line Items]
Investments owned	372,100	294,700
Equity securities | Long-term incentive compensation-related
Summary of Investment Holdings [Line Items]
Investments owned	35,212	31,934
Equity securities | Seed capital
Summary of Investment Holdings [Line Items]
Investments owned	176,545	169,502
Equity securities | Other
Summary of Investment Holdings [Line Items]
Investments owned	143	388
Investments in limited partnership hedge funds: | Long-term incentive compensation-related
Summary of Investment Holdings [Line Items]
Investments owned	18,845	10,831
Investments in limited partnership hedge funds: | Seed capital
Summary of Investment Holdings [Line Items]
Investments owned	26,939	18,397
Joint ventures
Summary of Investment Holdings [Line Items]
Investments owned	247,605	286,721
Other equity method investments
Summary of Investment Holdings [Line Items]
Investments owned	7,429	0
Time deposits
Summary of Investment Holdings [Line Items]
Investments owned	6,365	6,100
Other
Summary of Investment Holdings [Line Items]
Investments owned	$ 11,930	$ 11,331