Investments and Fair Value Measurement - Valuation of Investments by the Fair Value Hierarchy Levels (Details) - USD ($) $ in Thousands		Jun. 30, 2026	Dec. 31, 2025
Assets
Cash		$ 0	$ 0
Investments
Fair Value		1,046,573	774,863
Total cash and investments		1,046,573	774,863
Affiliated investee funds
Investments
Fair Value		1,042,880	770,905
Other Affiliated Investments
Investments
Fair Value	[1]	3,693	3,958
Level I
Assets
Cash		0	0
Investments
Total cash and investments		0	0
Level I | Affiliated investee funds
Investments
Fair Value		0	0
Level I | Other Affiliated Investments
Investments
Fair Value		0	0
Level II
Assets
Cash		0	0
Investments
Total cash and investments		0	0
Level II | Affiliated investee funds
Investments
Fair Value		0	0
Level II | Other Affiliated Investments
Investments
Fair Value		0	0
Level III
Assets
Cash		0	0
Investments
Fair Value		3,693	3,958
Total cash and investments		3,693	3,958
Level III | Affiliated investee funds
Investments
Fair Value		0	0
Level III | Other Affiliated Investments
Investments
Fair Value		3,693	3,958
NAV
Assets
Cash		0	0
Investments
Fair Value		1,042,880	770,905
Total cash and investments		1,042,880	770,905
NAV | Affiliated investee funds
Investments
Fair Value		1,042,880	770,905
NAV | Other Affiliated Investments
Investments
Fair Value		$ 0	$ 0

[1] EMEA is defined as Europe, Middle East and Africa.