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Stock-Based Compensation - Additional Information (Details) - USD ($)
$ in Millions
12 Months Ended
Apr. 04, 2013
Jan. 31, 2019
Jan. 31, 2018
Jan. 31, 2017
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Stock options granted   0 161,205 200,346
Compensation expense   $ 0.8 $ 0.5 $ 1.3
Compensation expense, net of tax   0.2 0.3 0.8
Unrecognized compensation cost related to unvested stock options   $ 0.6    
Weighted-average period   7 months 6 days    
Cash received for stock option exercises   $ 5.9 2.0 1.0
Realized tax provision   $ 0.2    
Minimum        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Number of shares issued percentage of target number of underlying stock award units   0.00%    
Maximum        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Number of shares issued percentage of target number of underlying stock award units   150.00%    
Stock Award Units        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Stock awards cliff-vested period   3 years    
Compensation expense   $ 3.8 1.8 3.2
Compensation expense, net of tax   $ 1.2 1.1 2.0
Weighted-average period   2 years 4 months 24 days    
Unrecognized compensation cost   $ 7.8    
Fair value of stock award units vested   3.1 2.6 4.8
Fair value of unvested stock award units   14.3 $ 10.5 $ 10.3
Realized tax expense on vested stock awards   $ 0.3    
Employee Stock Option Plan        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Number of common stock shares 11,000,000      
Options granted to participants exercisable period 3 years      
Stock awards cliff-vested period 3 years