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Schedule of Operations by Segment (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Apr. 30, 2017
Apr. 30, 2016
Jan. 31, 2017
Segment Reporting Information [Line Items]      
Total inventory $ 359,493 $ 359,865 $ 338,590
Total property and equipment, net 851,259 871,504 867,786
Total net sales 761,190 762,577  
General corporate expenses (15,148) (9,956)  
Total income from operations 21,036 50,483  
Operating Segments      
Segment Reporting Information [Line Items]      
Total income from operations 36,184 60,439  
Operating Segments | Retail Operations      
Segment Reporting Information [Line Items]      
Total inventory 324,126 324,940 301,519
Total property and equipment, net 847,926 867,813 864,396
Total net sales 690,352 700,193  
Total income from operations 19,905 50,799  
Operating Segments | Wholesale Operations      
Segment Reporting Information [Line Items]      
Total inventory 35,367 34,925 37,071
Total property and equipment, net 3,333 3,691 $ 3,390
Total net sales 72,949 64,488  
Total income from operations 16,269 9,811  
Intersegment Elimination      
Segment Reporting Information [Line Items]      
Total net sales (2,111) (2,104)  
Total income from operations $ 10 $ (171)