Consolidated Company-Sponsored Investment Funds - Offsetting of Derivative Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Derivative Asset [Abstract]
Cash Collateral Received	$ (5,700)	$ (8,400)
Derivative Liability [Abstract]
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Broker-Dealer, Payable to Other Broker-Dealer and Clearing Organization	Broker-Dealer, Payable to Other Broker-Dealer and Clearing Organization
Cash Collateral Pledged	$ (7,800)	$ (4,200)
VIEs
Derivative Asset [Abstract]
Gross Amounts of Recognized Assets	4,902	7,552
Gross Amounts Offset in the Statement of Financial Condition	0	0
Net Amounts of Assets Presented in the Statement of Financial Condition	4,902	7,552
Financial Instruments	0	0
Cash Collateral Received	(1,415)	(2,731)
Net Amount	3,487	4,821
Derivative Liability [Abstract]
Gross Amounts of Recognized Liabilities	2,531	21,540
Gross Amounts Offset in the Statement of Financial Condition	0	0
Net Amounts of Liabilities Presented in the Statement of Financial Condition	2,531	21,540
Financial Instruments	0	0
Cash Collateral Pledged	(1,408)	(5,444)
Net Amount	$ 1,123	$ 16,096