Consolidated Company-Sponsored Investment Funds - Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives - VIEs	$ 13,038	$ 14,518
Derivatives	17,908	18,180
Total liabilities measured at fair value	147,127	270,870
Level 1 | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives - VIEs	106	1
Total assets measured at fair value	350,378	268,610
Derivatives	3,004	3,511
Total liabilities measured at fair value	3,004	3,511
Level 2 | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives - VIEs	12,932	14,517
Total assets measured at fair value	564,781	914,300
Derivatives	14,904	14,669
Total liabilities measured at fair value	14,904	14,669
Level 3 | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	138	118
Total liabilities measured at fair value	129,219	252,690
Company-Sponsored Investment Funds | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	267,300	410,851
Total liabilities measured at fair value	414	2,531
Company-Sponsored Investment Funds | Level 1 | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	16,948	60,630
Total liabilities measured at fair value	74	944
Company-Sponsored Investment Funds | Level 2 | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	250,259	350,221
Total liabilities measured at fair value	340	1,587
Company-Sponsored Investment Funds | Level 3 | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	93	0
Total liabilities measured at fair value	0	0
VIEs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives - VIEs	271	4,902
Derivatives	414	2,531
VIEs | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments - VIEs	211,994	286,619
Derivatives - VIEs	271	4,902
Derivatives	414	2,531
VIEs | Level 1 | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments - VIEs	16,337	49,455
Derivatives - VIEs	153	2,139
Derivatives	74	944
VIEs | Level 2 | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments - VIEs	195,564	237,164
Derivatives - VIEs	118	2,763
Derivatives	340	1,587
VIEs | Level 3 | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments - VIEs	93	0
Derivatives - VIEs	0	0
Derivatives	0	0
VOEs | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments - VIEs	55,035	110,555
Derivatives - VIEs		8,775
VOEs | Level 1 | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments - VIEs	458	9,036
Derivatives - VIEs		0
VOEs | Level 2 | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments - VIEs	54,577	101,519
Derivatives - VIEs		8,775
VOEs | Level 3 | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments - VIEs	$ 0	0
Derivatives - VIEs		$ 0