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Employee Compensation and Benefits - Additional Information (Details) - USD ($)
 12 Months Ended
May 09, 2023
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Compensation Items [Line Items]          
Partnership interest-based compensation   $ 46,181,000 $ 72,068,000 $ 103,934,000  
Interest-based compensation, award modifications   15,400,000 18,500,000 0  
Unvested stated target payments   25,600,000 0 0  
Interest-based compensation expense, profit interest   25,200,000 16,800,000 21,400,000  
Holdings Awards          
Compensation Items [Line Items]          
Partnership interest-based compensation   0 14,900,000 60,600,000  
Aggregate grant date fair value $ 155,500,000        
Target amount reserved       80,000,000.0  
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   46,200,000 72,100,000 103,900,000  
GCMH Equityholders Awards          
Compensation Items [Line Items]          
Partnership interest-based compensation   $ 5,600,000 $ 21,900,000 $ 21,900,000  
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