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Employee Compensation and Benefits - Additional Information (Details) - USD ($)
 12 Months Ended
May 09, 2023
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Compensation Items [Line Items]        
Partnership interest-based compensation   $ 72,068,000 $ 103,934,000 $ 31,811,000
Interest-based compensation, award modifications   18,500,000 0 6,300,000
Unvested stated target payments   0 0 0
Interest-based compensation expense, profit interest   16,800,000 21,400,000 23,100,000
Holdings Awards        
Compensation Items [Line Items]        
Partnership interest-based compensation   14,900,000 60,600,000  
Aggregate grant date fair value $ 155,500,000      
Target amount reserved     80,000,000  
Estimated holding period (in years) 10 years      
Pre-tax cost of equity percentage 15.40%      
Discount rate (as percent) 13.00%      
Volatility rate (as percent) 35.00%      
Discount rate for lack of marketability (as percent) 40.00%      
Holdings, Holdings II and Management LLC        
Compensation Items [Line Items]        
Partnership interest-based compensation   72,100,000 103,900,000 31,800,000
GCMH Equityholders Awards        
Compensation Items [Line Items]        
Partnership interest-based compensation   21,900,000 $ 21,900,000 $ 2,400,000
Equityholders awards, aggregate grant fair value (in shares)       7,169,415
Aggregate grant date fair value       $ 53,400,000
Equityholders awards, grant fair value (in usd per share)       $ 7.45
Nonvested award, cost not yet recognized, amount   $ 7,200,000    
Nonvested award, cost not yet recognized, period for recognition (in years)   3 months 18 days