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REVENUE RECOGNITION - Disaggregation of Revenue Based on Business Segment Results (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Financial Advisory        
Disaggregation Of Revenue [Line Items]        
Net revenue $ 352,477 $ 407,885 $ 630,051 $ 798,100
Asset Management        
Disaggregation Of Revenue [Line Items]        
Net revenue 288,313 289,151 572,357 627,652
Asset Management | Management Fees and Other        
Disaggregation Of Revenue [Line Items]        
Net revenue 282,335 281,813 560,933 595,149
Asset Management | Incentive Fees        
Disaggregation Of Revenue [Line Items]        
Net revenue $ 5,978 $ 7,338 $ 11,424 $ 32,503