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Share-Based Compensation - Additional Information (Detail)
$ in Millions
3 Months Ended
Mar. 31, 2020
USD ($)
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Share available for future grants | shares 800,000
Stock options contractual terms 10 years
Unvested stock options | shares 0
Stock option granted | shares 0
Aggregate intrinsic value of options exercised $ 0.3
Performance Based Awards  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Share-awards vesting period 3 years
Percentage of number of options vested 0.00%
Restricted stock awards  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Unrecognized compensation cost $ 13.2
Weighted average recognition period (years) 1 year 9 months 18 days
Aggregated grant date fair value of restricted stock awards vested $ 7.8
Aggregated vesting date fair value of restricted stock awards vested $ 8.9
Restricted stock awards | Shares Granted in 2019  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Percentage of number of options vested 163.00%
Restricted stock awards | Shares Granted in 2018  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Percentage of number of options vested 200.00%
Stock options  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Percentage of number of options vested 200.00%
Minimum | Nonvested share-awards  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Share-awards vesting period 3 years
Minimum | Performance Based Awards  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Percentage of number of options vested 50.00%
Maximum | Nonvested share-awards  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Share-awards vesting period 4 years
Maximum | Performance Based Awards  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Percentage of number of options vested 200.00%