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Employee Stock-Based Compensation - Additional Information (Detail) - 2014 Incentive Plan
9 Months Ended
Sep. 30, 2021
$ / shares
shares
Time Based Restricted Stock Unit Grants  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
RSUs Granted 577,500
Weighted average grant date fair value, granted | $ / shares $ 47.56
Time Based Restricted Stock Unit Grants | Share Based Compensation Award Vesting Over Three Years  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
RSUs Granted 536,000
Stock award granted vesting period 3 years
Time Based Restricted Stock Unit Grants | Share Based Compensation Award Tranche One  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Stock award vesting percentage 33.00%
Time Based Restricted Stock Unit Grants | Share Based Compensation Award Tranche Two  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Stock award vesting percentage 33.00%
Time Based Restricted Stock Unit Grants | Share Based Compensation Award Tranche Three  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Stock award vesting percentage 33.00%
Time Based Restricted Stock Unit Grants | Share Based Compensation Award Vesting Over Two Years  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Stock award granted vesting period 2 years
Time Based Restricted Stock Unit Grants | Share Based Compensation Award Vesting On Second Anniversary  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
RSUs Granted 37,000
Stock award vesting percentage 50.00%
Time Based Restricted Stock Unit Grants | Share Based Compensation Award Vesting On Second and Third Anniversary  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
RSUs Granted 4,500
Stock award vesting percentage 25.00%
Time Based Restricted Stock Unit Grants | Share Based Compensation Award Vesting On Fourth Anniversary  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Stock award vesting percentage 50.00%
Performance and Service Condition Based Restricted Stock Unit Grants  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
RSUs Granted 37,000
Stock award granted vesting period 2 years
Weighted average grant date fair value, granted | $ / shares $ 40.81
Performance and Service Condition Based Restricted Stock Unit Grants | Minimum  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Percentage of number of shares of common stock earned 0.00%
Performance and Service Condition Based Restricted Stock Unit Grants | Maximum  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Percentage of number of shares of common stock earned 120.00%
Performance Market and Service Condition Based Restricted Stock Unit Grants  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
RSUs Granted 188,000
Stock award granted vesting period 3 years
Weighted average grant date fair value, granted | $ / shares $ 47.85
Increased percentage of number of shares of additional common stock earned 10.00%
Decreased percentage of number of shares of additional common stock earned 10.00%
Performance Market and Service Condition Based Restricted Stock Unit Grants | Minimum  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Percentage of number of shares of common stock earned 0.00%
Performance Market and Service Condition Based Restricted Stock Unit Grants | Maximum  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Percentage of number of shares of common stock earned 200.00%