Investments - Additional Information (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Summary of Investment Holdings [Line Items]
Long-term incentive compensation-related	$ 37,300	$ 47,900
Investments owned	238,214	217,518
Seed capital
Summary of Investment Holdings [Line Items]
Investments owned	$ 333,400	$ 309,600