Investments - Summary of Investments (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Summary of Investment Holdings [Line Items]
Total investments	$ 433,409	$ 531,013
Joint ventures
Summary of Investment Holdings [Line Items]
Total investments	197,109	247,605
Other equity method investments
Summary of Investment Holdings [Line Items]
Total investments	0	7,429
Time deposits
Summary of Investment Holdings [Line Items]
Total investments	6,278	6,365
Other
Summary of Investment Holdings [Line Items]
Total investments	11,376	11,930
Long-term incentive compensation-related | Equity securities
Summary of Investment Holdings [Line Items]
Total investments	39,007	35,212
Long-term incentive compensation-related | Investments in limited partnership hedge funds:
Summary of Investment Holdings [Line Items]
Total investments	3,661	18,845
Seed capital
Summary of Investment Holdings [Line Items]
Total investments	383,100	372,100
Seed capital | Equity securities
Summary of Investment Holdings [Line Items]
Total investments	138,103	176,545
Seed capital | Investments in limited partnership hedge funds:
Summary of Investment Holdings [Line Items]
Total investments	37,718	26,939
Other | Equity securities
Summary of Investment Holdings [Line Items]
Total investments	$ 157	$ 143