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Summary of Restricted Stock Activity (Detail) - Restricted Stock [Member] - $ / shares
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares, Restricted beginning balance 2,589,261    
Shares, Granted 180,617    
Shares, Vested (19,401)    
Shares, Forfeited (13,796)    
Shares, Restricted ending balance 2,736,681 2,589,261  
Weighted-Average Grant Date Fair Value, Restricted beginning balance $ 112.53    
Weighted-Average Grant Date Fair Value, Granted 302.71 $ 290.55 $ 254.73
Weighted-Average Grant Date Fair Value, Vested 107.81    
Weighted-Average Grant Date Fair Value, Forfeited 243.17    
Weighted-Average Grant Date Fair Value, Restricted ending balance $ 124.56 $ 112.53