Consolidated Company-Sponsored Investment Funds - Additional Information (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2026 USD ($)	Jun. 30, 2025 USD ($)	Jun. 30, 2026 USD ($) investment	Jun. 30, 2025 USD ($)	Dec. 31, 2025 USD ($)
Derivative [Line Items]
Net (losses) on derivative instruments	$ (13,522,000)	$ (11,074,000)	$ (9,720,000)	$ (23,850,000)
Cash collateral payable to trade counterparties	4,836,000		4,836,000		$ 5,547,000
Cash collateral received	13,132,000		13,132,000		10,293,000
Net assets					51,300,000,000
Maximum risk of loss in investment in VIEs					40,400,000
Advisory fee receivables	150,271,000		150,271,000		139,755,000
VIEs
Derivative [Line Items]
Other derivatives not designated as hedging instruments at fair value, net	600,000		600,000		0
Net (losses) on derivative instruments	5,200,000	200,000	600,000	300,000
Cash collateral payable to trade counterparties	260,000		260,000		0
Delivery of cash collateral	700,000		700,000		500,000
Cash collateral received	745,000		745,000		492,000
VOEs
Derivative [Line Items]
Net (losses) on derivative instruments	0	$ 0	0	$ 0
Cash collateral payable to trade counterparties	0		0		0
Futures, forwards and swaps held	0		0		0
Cash collateral received	0		0		0
Non-consolidated VIEs
Derivative [Line Items]
Net assets	79,000,000,000.0		79,000,000,000.0
Maximum risk of loss in investment in VIEs	51,200,000		51,200,000
Advisory fee receivables	$ 117,700,000		$ 117,700,000		105,100,000
Seed capital
Derivative [Line Items]
Number of deconsolidated funds | investment			2
Seed investment, deconsolidated amount					$ 29,600,000