Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation Narrative (Details)

v3.20.1
Stock-Based Compensation Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended
Apr. 30, 2020
Mar. 31, 2020
Mar. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award      
Stock-based compensation expense   $ 5,920 $ 3,400
Stock-based compensation expense, tax benefit   $ 1,468 $ 840
Number of shares available for grant (shares)   2,599,935  
Subsequent Event      
Share-based Compensation Arrangement by Share-based Payment Award      
Number of additional shares authorized 9,000,000    
Restricted Stock Units (RSUs)      
Share-based Compensation Arrangement by Share-based Payment Award      
Granted   1,144,072  
Unrecognized stock-based compensation expense   $ 31,661  
Unrecognized stock-based compensation expense, period for recognition   2 years 14 days  
Performance Stock Units (PSUs)      
Share-based Compensation Arrangement by Share-based Payment Award      
Granted   456,311  
Unrecognized stock-based compensation expense   $ 13,709  
Unrecognized stock-based compensation expense, period for recognition   2 years 4 months 24 days  
Performance Stock Units (PSUs) | Total Shareholder Return [Member]      
Share-based Compensation Arrangement by Share-based Payment Award      
Award vesting percentage   50.00%  
Performance Stock Units (PSUs) | Financial Performance Target [Member]      
Share-based Compensation Arrangement by Share-based Payment Award      
Award vesting period   3 years  
Award vesting percentage   50.00%  
Director | Restricted Stock Units (RSUs)      
Share-based Compensation Arrangement by Share-based Payment Award      
Award vesting period   1 year  
Employee | Restricted Stock Units (RSUs)      
Share-based Compensation Arrangement by Share-based Payment Award      
Award vesting period   3 years  
Minimum | Performance Stock Units (PSUs)      
Share-based Compensation Arrangement by Share-based Payment Award      
Award vesting percentage   0.00%  
Maximum | Performance Stock Units (PSUs)      
Share-based Compensation Arrangement by Share-based Payment Award      
Award vesting percentage   200.00%