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Schedule of Revenues and Long-Lived Assets, by Domestic and Foreign Operations 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 property and equipment, net $ 829,106 $ 872,309 $ 829,106 $ 872,309 $ 867,786
Total net sales 892,774 862,491 2,526,895 2,515,636  
Domestic Operations          
Segment Reporting Information [Line Items]          
Total property and equipment, net 735,731 767,916 735,731 767,916 766,419
Total net sales 779,790 760,074 2,222,589 2,211,925  
Foreign Operations          
Segment Reporting Information [Line Items]          
Total property and equipment, net 93,375 104,393 93,375 104,393 $ 101,367
Total net sales $ 112,984 $ 102,417 $ 304,306 $ 303,711