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Schedule of Operations by Segment (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Apr. 30, 2019
Apr. 30, 2018
Jan. 31, 2019
Segment Reporting Information [Line Items]      
Total net sales $ 864,413 $ 855,688  
General corporate expenses (9,271) (12,815)  
Total income from operations 40,020 53,896  
Total inventory 408,362 404,617 $ 370,507
Total property and equipment, net 829,072 819,725 796,029
Retail Operations      
Segment Reporting Information [Line Items]      
Total inventory 365,554 353,423 328,783
Total property and equipment, net 819,062 817,277 793,640
Wholesale Operations      
Segment Reporting Information [Line Items]      
Total inventory 42,808 51,194 41,724
Total property and equipment, net 2,312 2,448 $ 2,389
Subscription Operations      
Segment Reporting Information [Line Items]      
Total property and equipment, net 7,698    
Operating Segments      
Segment Reporting Information [Line Items]      
Total income from operations 49,291 66,711  
Operating Segments | Retail Operations      
Segment Reporting Information [Line Items]      
Total net sales 782,563 775,564  
Total income from operations 34,694 51,872  
Operating Segments | Wholesale Operations      
Segment Reporting Information [Line Items]      
Total net sales 84,365 82,941  
Total income from operations 16,761 14,805  
Operating Segments | Subscription Operations      
Segment Reporting Information [Line Items]      
Total income from operations (2,101)    
Intersegment Elimination      
Segment Reporting Information [Line Items]      
Total net sales (2,515) (2,817)  
Total income from operations $ (63) $ 34