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Consolidated Company-Sponsored Investment Funds - Change in Carrying Value Associated with Level 3 Financial Instruments (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Fair value measurement Level 3 reconciliation [Abstract]    
Balance as of beginning of period $ 129 $ 126
Purchases 0 0
Sales 0 0
Balance as of end of period 118 129
Company-sponsored investment funds    
Fair value measurement Level 3 reconciliation [Abstract]    
Balance as of beginning of period 0 3,357
Deconsolidated funds 0 (3,351)
Transfers (out) 0 (6)
Purchases 0 248
Sales 0 (248)
Balance as of end of period $ 0 $ 0