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Share-Based Compensation - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Jan. 31, 2022
Jan. 31, 2021
Jan. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Tax benefit associated with share-based compensation expense $ 6,311 $ 4,899 $ 5,230
Tax benefit realized from share-based compensation $ 5,573 $ 2,528 $ 4,425
Common shares per PSU 100.00%    
2017 Stock Incentive Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Common shares authorized 10,000,000    
Common shares available to grant 6,862,703    
2008 Stock Incentive Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Common shares authorized 10,000,000    
Common shares available to grant 5,464,830    
2017 and 2008 Stock Incentive Plan | Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock options vesting period, maximum (in years) 7 years    
2017 and 2008 Stock Incentive Plan | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock options vesting period, maximum (in years) 10 years    
Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock options vesting period, maximum (in years) 1 year    
Compensation cost of stock options granted but not yet vested $ 0    
Stock Options | Non-employee Directors      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock options vesting period, maximum (in years) 1 year    
Restricted Stock Units (RSUs)      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Compensation cost of stock options granted but not yet vested $ 33,444    
Weighted average grant date fair value $ 37.30 $ 25.31 $ 29.92
Weighted average period of recognition (in years) 2 years 1 month 6 days    
Vested, Shares 613,299    
Aggregate grant date fair value, vested $ 29.66 $ 31.11 26.80
Restricted Stock Units (RSUs) | Non-employee Directors      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock options granted 0 0  
Restricted Stock Units (RSUs) | Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock options vesting period, maximum (in years) 2 years    
Restricted Stock Units (RSUs) | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock options vesting period, maximum (in years) 5 years    
Performance Stock Units (PSUs)      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Compensation cost of stock options granted but not yet vested $ 6,671    
Weighted average grant date fair value $ 38.15 $ 25.84 $ 30.19
Weighted average period of recognition (in years) 2 years 2 months 12 days    
Vested, Shares 70,001    
Aggregate grant date fair value, vested $ 26.54    
Performance Stock Units (PSUs) | Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock options vesting period, maximum (in years) 2 years    
Performance Stock Units (PSUs) | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock options vesting period, maximum (in years) 5 years