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Investments - Gains and Losses Recognized in Gain (Loss) on Securities, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Gain (Loss) on Securities [Line Items]
Net Unrealized Gains (Losses)	$ (24,383)	$ 1,965	$ 19,403
Gain (Loss) on Securities, net	(28,696)	9,532	18,067
Investments—Consolidated Investment Companies
Gain (Loss) on Securities [Line Items]
Net Unrealized Gains (Losses)	(7,896)	642	13,862
Net Realized Gains (Losses)	(7,333)	1,609	(1,352)
Gain (Loss) on Securities, net	(15,229)	2,251	12,510
Investments—Affiliates and Other
Gain (Loss) on Securities [Line Items]
Net Unrealized Gains (Losses)	(16,487)	1,323	5,541
Net Realized Gains (Losses)	3,020	5,958	16
Gain (Loss) on Securities, net	$ (13,467)	$ 7,281	$ 5,557

X

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

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