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Employee Incentive Plans - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock-based compensation expense $ 17,710 $ 14,204 $ 32,903 $ 32,333
RSUs        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Granted (shares)     4,839,092  
Equity instruments other than options, aggregate fair value     $ 55,200  
Unrecognized compensation cost related to unvested awards 128,200   $ 128,200  
Unrecognized compensation cost, period for recognition     2 years 6 months  
PBRSUs        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Granted (shares)     568,285  
Unrecognized compensation cost related to unvested awards 14,700   $ 14,700  
Unrecognized compensation cost, period for recognition     2 years  
Stock-based compensation expense 2,300 300 $ 3,500 1,100
Internally Developed Software        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock-based compensation expense, capitalized amount $ 1,200 $ 1,300 $ 2,200 $ 2,900