Investments - Summary of Investments (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Summary of Investment Holdings [Line Items]
Total investments	$ 433,443	$ 531,013
Joint ventures
Summary of Investment Holdings [Line Items]
Total investments	191,557	247,605
Other equity method investments
Summary of Investment Holdings [Line Items]
Total investments	2,024	7,429
Time deposits
Summary of Investment Holdings [Line Items]
Total investments	6,256	6,365
Other
Summary of Investment Holdings [Line Items]
Total investments	10,941	11,930
Long-term incentive compensation-related | Equity securities
Summary of Investment Holdings [Line Items]
Total investments	31,676	35,212
Long-term incentive compensation-related | Investments in limited partnership hedge funds:
Summary of Investment Holdings [Line Items]
Total investments	9,853	18,845
Seed capital
Summary of Investment Holdings [Line Items]
Total investments	340,100	372,100
Seed capital | Equity securities
Summary of Investment Holdings [Line Items]
Total investments	146,205	176,545
Seed capital | Investments in limited partnership hedge funds:
Summary of Investment Holdings [Line Items]
Total investments	34,793	26,939
Other | Equity securities
Summary of Investment Holdings [Line Items]
Total investments	$ 138	$ 143