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Schedule of Operations by Segment (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Oct. 31, 2017
Oct. 31, 2016
Oct. 31, 2017
Oct. 31, 2016
Jan. 31, 2017
Segment Reporting Information [Line Items]          
Total net sales $ 892,774 $ 862,491 $ 2,526,895 $ 2,515,636  
General corporate expenses (9,706) (14,365) (38,935) (38,667)  
Total income from operations 72,888 70,305 169,104 239,000  
Total inventory 449,957 453,826 449,957 453,826 $ 338,590
Total property and equipment, net 829,106 872,309 829,106 872,309 867,786
Operating Segments          
Segment Reporting Information [Line Items]          
Total income from operations 82,594 84,670 208,039 277,667  
Operating Segments | Retail Operations          
Segment Reporting Information [Line Items]          
Total net sales 808,546 785,026 2,289,526 2,300,981  
Total income from operations 61,667 67,981 150,575 234,022  
Total inventory 403,631 415,923 403,631 415,923 301,519
Total property and equipment, net 826,296 869,042 826,296 869,042 864,396
Operating Segments | Wholesale Operations          
Segment Reporting Information [Line Items]          
Total net sales 88,663 81,552 245,866 222,712  
Total income from operations 20,866 17,006 57,373 44,213  
Total inventory 46,326 37,903 46,326 37,903 37,071
Total property and equipment, net 2,810 3,267 2,810 3,267 $ 3,390
Intersegment Elimination          
Segment Reporting Information [Line Items]          
Total net sales (4,435) (4,087) (8,497) (8,057)  
Total income from operations $ 61 $ (317) $ 91 $ (568)