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REVENUE RECOGNITION - Disaggregation of Revenue Based on Business Segment Results (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Financial Advisory        
Disaggregation Of Revenue [Line Items]        
Net revenue $ 266,048 $ 456,521 $ 896,099 $ 1,254,621
Asset Management        
Disaggregation Of Revenue [Line Items]        
Net revenue 284,855 298,797 857,212 926,449
Asset Management | Management Fees And Other        
Disaggregation Of Revenue [Line Items]        
Net revenue 282,657 277,202 843,590 872,351
Asset Management | Incentive Fees        
Disaggregation Of Revenue [Line Items]        
Net revenue $ 2,198 $ 21,595 $ 13,622 $ 54,098