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Equity-based Compensation - Equity-Based Compensation Expense - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation expense $ 66,018 $ 49,524 $ 39,260
Total unrecognized compensation expense related to stock options 132,500    
Restricted Stock Units [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total unrecognized compensation expense $ 45,700    
Unrecognized compensation expense, remaining weighted-average period for recognition 2 years 1 month 6 days    
Stock Options [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Unrecognized compensation expense, remaining weighted-average period for recognition 2 years 9 months 18 days