Consolidated Company-Sponsored Investment Funds - Fair Value (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives - VIEs	$ 27,050	$ 20,941
Derivatives	30,077	14,944
Total liabilities measured at fair value	39,304	24,329
Level 1 | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives - VIEs	322	2,835
Total assets measured at fair value	298,177	351,975
Derivatives	2,582	33
Total liabilities measured at fair value	3,289	33
Level 2 | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives - VIEs	26,728	18,106
Total assets measured at fair value	541,202	523,272
Derivatives	27,495	14,911
Total liabilities measured at fair value	27,495	14,911
Company-Sponsored Investment Funds | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	461,228	152,376
Total liabilities measured at fair value	18,223	85
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	36,946	15,537
Total liabilities measured at fair value	799	72
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	424,282	136,839
Total liabilities measured at fair value	17,424	13
VIEs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives - VIEs	18,016	101
Derivatives	18,039	85
VIEs | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments - VIEs	379,850	82,027
Derivatives - VIEs	18,016	101
Derivatives	18,039	85
VIEs | Level 1 | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments - VIEs	30,330	15,240
Derivatives - VIEs	810	48
Derivatives	799	72
VIEs | Level 2 | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments - VIEs	349,520	66,787
Derivatives - VIEs	17,206	53
Derivatives	17,240	13
VOEs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives - VIEs	197	11,483
Derivatives	184
VOEs | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments - VIEs	63,165	58,765
Derivatives - VIEs	197	11,483
Derivatives	184
VOEs | Level 1 | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments - VIEs	5,806	249
Derivatives - VIEs	0	0
Derivatives	0
VOEs | Level 2 | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments - VIEs	57,359	58,516
Derivatives - VIEs	197	$ 11,483
Derivatives	$ 184