Consolidated Company-Sponsored Investment Funds - Additional Information (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2025 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2025 USD ($) fund	Jun. 30, 2024 USD ($)	Dec. 31, 2024 USD ($)
Derivative [Line Items]
Net losses on derivative instruments	$ 11,074,000	$ 1,630,000	$ 23,850,000	$ 6,580,000
Cash collateral payable to trade counterparties	3,700,000		3,700,000		$ 10,400,000
Cash collateral received	13,400,000		13,400,000		5,200,000
Advisory fee receivables	158,897,000		158,897,000		159,336,000
VIEs
Derivative [Line Items]
Futures, forwards and swaps held	0		0		0
Net losses on derivative instruments	200,000	500,000	300,000	900,000
Cash collateral payable to trade counterparties	28,000		28,000		2,000
Delivery of cash collateral	700,000		700,000		300,000
Cash collateral received	722,000		722,000		85,000
VOEs
Derivative [Line Items]
Futures, forwards and swaps held	0		0		11,500,000
Net losses on derivative instruments	0	$ 0	0	$ 0
Cash collateral payable to trade counterparties	0		0		0
Cash collateral received	0		0		0
Non-consolidated VIEs
Derivative [Line Items]
Net assets	46,400,000,000		46,400,000,000		46,900,000,000
Maximum risk of loss in investment in VIEs	19,300,000		19,300,000		17,300,000
Advisory fee receivables	$ 88,200,000		$ 88,200,000		115,200,000
Seed capital
Derivative [Line Items]
Number of deconsolidated funds | fund			2
Seed investment, deconsolidated amount					$ 10,400,000