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Investments - Gains and Losses Recognized in Gain (Loss) on Securities, Net (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
(Loss) Gain on Securities [Line Items]
Net Unrealized Gains (Losses)			$ 1,920	$ (35,425)
Gain (Loss) on Securities, net	$ (3,438)	$ (6,825)	2,094	(39,406)
Investments | Consolidated Investment Companies
(Loss) Gain on Securities [Line Items]
Net Unrealized Gains (Losses)	(1,680)	1,137	2,582	(16,446)
Net Realized Gains (Losses)	(125)	(4,568)	(1,101)	(6,047)
Gain (Loss) on Securities, net	(1,805)	(3,431)	1,481	(22,493)
Investments | Affiliates
(Loss) Gain on Securities [Line Items]
Net Unrealized Gains (Losses)	(1,518)	(3,248)	(662)	(18,979)
Net Realized Gains (Losses)	(115)	(146)	1,275	2,066
Gain (Loss) on Securities, net	$ (1,633)	$ (3,394)	$ 613	$ (16,913)

X

- Definition

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

+ References

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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