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Investments - Gains and Losses Recognized in Gain (Loss) on Securities, Net (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
(Loss) Gain on Securities [Line Items]
Net Unrealized Gains (Losses)	$ 1,334	$ 5,974
Gain (Loss) on Securities, net	1,747	5,492
Investments | Investments—Consolidated Investment Companies
(Loss) Gain on Securities [Line Items]
Net Unrealized Gains (Losses)	(7)	3,621
Net Realized Gains (Losses)	(186)	(641)
Gain (Loss) on Securities, net	(193)	2,980
Investments | Investments—Affiliates and Other
(Loss) Gain on Securities [Line Items]
Net Unrealized Gains (Losses)	1,341	2,353
Net Realized Gains (Losses)	599	159
Gain (Loss) on Securities, net	$ 1,940	$ 2,512

X

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/recommendedDisclosureRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
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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
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
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-Subparagraph (SX 210.5-03(7)(c))
-Publisher FASB
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Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
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-Publisher FASB
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