Consolidated Company-Sponsored Investment Funds - Additional Information (Details)	3 Months Ended
	Mar. 31, 2024 USD ($) fund	Mar. 31, 2023 USD ($)	Dec. 31, 2023 USD ($)
Derivative [Line Items]
Gains (losses) on derivative instruments	$ (4,950,000)	$ (10,494,000)
Cash collateral payable to trade counterparties	7,700,000		$ 5,700,000
Cash collateral received	4,000,000		7,800,000
Maximum risk of loss in investment in VIEs			10,300,000
Advisory fee receivables	129,257,000		125,500,000
VIEs
Derivative [Line Items]
Futures, forwards and swaps held	300,000		2,400,000
Gains (losses) on derivative instruments	(500,000)	1,700,000
Cash collateral payable to trade counterparties	725,000		1,415,000
Cash collateral received	1,679,000		1,408,000
VOEs
Derivative [Line Items]
Futures, forwards and swaps held	0		8,800,000
Gains (losses) on derivative instruments	0	$ 0
Cash collateral payable to trade counterparties	0
Cash collateral received	0
Non-consolidated VIEs
Derivative [Line Items]
Net assets	65,500,000,000		54,600,000,000
Maximum risk of loss in investment in VIEs	22,200,000
Advisory fee receivables	$ 115,000,000		114,500,000
Seed capital
Derivative [Line Items]
Number of deconsolidated funds | fund	2
Seed investment, deconsolidated amount			$ 18,500,000