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Investments - Gains and Losses Recognized in Gain (Loss) on Securities, Net (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
(Loss) Gain on Securities [Line Items]
Net Unrealized Gains (Losses)	$ 5,974	$ (11,847)
Gain (Loss) on Securities, net	5,492	(11,695)
Investments—Consolidated Investment Companies
(Loss) Gain on Securities [Line Items]
Net Unrealized Gains (Losses)	3,621	(5,188)
Net Realized Gains (Losses)	(641)	(462)
Gain (Loss) on Securities, net	2,980	(5,650)
Investments—Affiliates and Other
(Loss) Gain on Securities [Line Items]
Net Unrealized Gains (Losses)	2,353	(6,659)
Net Realized Gains (Losses)	159	614
Gain (Loss) on Securities, net	$ 2,512	$ (6,045)

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Amount of realized and unrealized gain (loss) on investment.

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