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Stock-Based Incentive Plans - Movement in Outstanding Shares of Restricted Class A Common Stock and Weighted-Average Grant Date Fair Value Per Share (Detail) - Restricted Class A Common Stock - $ / shares
9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Restricted Class A Common Stock    
Beginning balance (in shares) 1,883,784  
Granted (in shares) 505,432  
Vested (in shares) (834,264)  
Forfeited (in shares) (15,477) (33,250)
Ending balance (in shares) 1,539,475  
Weighted-Average Grant Date Fair Value Per Share    
Beginning balance (in dollars per share) $ 27.90  
Granted (in dollars per share) 21.37  
Vested (in dollars per share) 27.34  
Forfeited (in dollars per share) 24.55  
Ending balance (in dollars per share) $ 26.09