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Summary of Non-Vested Restricted Stock Activity (Detail) - Non-Vested Restricted Stock - $ / shares
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares, Non-vested beginning balance 3,335,107    
Shares, Granted 194,643    
Shares, Vested (13,000)    
Shares, Forfeited (57,089)    
Shares, Non-vested ending balance 3,459,661 3,335,107  
Weighted-Average Grant Date Fair Value, Non-vested beginning balance $ 75.00    
Weighted-Average Grant Date Fair Value, Granted 254.73 $ 193.89 $ 151.58
Weighted-Average Grant Date Fair Value, Vested 138.97    
Weighted-Average Grant Date Fair Value, Forfeited 131.31    
Weighted-Average Grant Date Fair Value, Non-vested ending balance $ 83.94 $ 75.00