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Shareholders' Equity - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Apr. 01, 2019
Jan. 31, 2019
Jan. 31, 2018
Jan. 31, 2017
Aug. 22, 2017
Feb. 23, 2015
Equity, Class of Treasury Stock [Line Items]            
Common shares authorized for repurchase, shares           20,000,000
Additional common shares authorized for repurchase, shares         20,000,000  
Remaining common shares authorized for repurchase, shares   14,402,153        
Stock repurchased and retired during period, total cost   $ (131,642) $ (159,226) $ (47,839)    
Employee Stock            
Equity, Class of Treasury Stock [Line Items]            
Stock repurchased and retired during period, common shares   254,181 92,455      
Stock repurchased and retired during period, total cost   $ 10,245 $ 2,182      
Subsequent Event            
Equity, Class of Treasury Stock [Line Items]            
Stock repurchased and retired during period, common shares 2,430,827          
Stock repurchased and retired during period, total cost $ 71,242          
Average cost per share, including commissions $ 29.31