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Compensation and Benefits - Change in Value of Investments (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Variable Interest Entity, Primary Beneficiary        
Schedule of Investments [Line Items]        
Net investment gain (loss) of nonconsolidated investment products $ 3,287 $ 13,462 $ 22,471 $ 28,402
Long-Term Cash Awards | Compensation and benefits        
Schedule of Investments [Line Items]        
Compensation and benefits 666 714 4,591 2,446
Long-Term Cash Awards | Net investment gain (loss) of nonconsolidated investment products        
Schedule of Investments [Line Items]        
Net investment gain (loss) of nonconsolidated investment products (586) 3,563 9,028 10,581
Long-Term Cash Awards | Net investment gain (loss) of nonconsolidated investment products | Variable Interest Entity, Primary Beneficiary        
Schedule of Investments [Line Items]        
Net investment gain (loss) of nonconsolidated investment products $ 291 $ 375 $ 1,122 $ 563