Consolidated Company-Sponsored Investment Funds - Summary of Offsetting of Derivative Assets and Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Derivatives
Cash Collateral Received	$ (6,800)	$ (5,500)
Derivatives
Cash Collateral Pledged	(13,000)	(10,300)
VIEs
Derivatives
Gross Amounts of Recognized Assets	21,611	20,077
Gross Amounts Offset in the Statement of Financial Condition	0	0
Net Amounts of Assets Presented in the Statement of Financial Condition	21,611	20,077
Financial Instruments Collateral	0	0
Cash Collateral Received	(100)	0
Net Amount	21,511	20,077
Derivatives
Gross Amounts of Recognized Liabilities	25,059	20,084
Gross Amounts Offset in the Statement of Financial Condition	0	0
Net Amounts of Liabilities Presented in the Statement of Financial Condition	25,059	20,084
Financial Instruments Collateral	0	0
Cash Collateral Pledged	(3,609)	(492)
Net Amount	$ 21,450	$ 19,592