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Stock-Based Awards - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Dec. 31, 2016
Jun. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Aggregate of unrecognized stock-based compensation cost   $ 43,977
Weighted average recognition period   2 years 6 months
Restricted Stock Units [Member] | Tranche One [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Vesting percentage 50.00%  
Vesting period 3 years  
Restricted Stock Units [Member] | Tranche Two [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Vesting percentage 50.00%  
Vesting period 4 years  
Executive Officers [Member] | Relative Total Stockholder Return Units [Member] | Minimum [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of shares range percentage   0.00%
Executive Officers [Member] | Relative Total Stockholder Return Units [Member] | Maximum [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of shares range percentage   150.00%