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FAIR VALUE MEASUREMENTS - Narrative (Details) - USD ($)
$ in Millions
1 Months Ended
Dec. 31, 2021
Mar. 31, 2024
Dec. 31, 2023
OHA Acquisition      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Contingent consideration, maximum earnout payment $ 900.0    
Extended earnout payment period 2 years    
Earnout 30% threshold 22.00%    
Incentive payment, percentage 10.00%    
Fair value measured at NAV      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investments held at fair value   $ 67.1 $ 69.0