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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, 2016
Oct. 31, 2015
Oct. 31, 2016
Oct. 31, 2015
Jan. 31, 2016
Segment Reporting Information [Line Items]          
Total property and equipment, net $ 872,309 $ 891,871 $ 872,309 $ 891,871 $ 863,137
Total net sales 862,491 825,258 2,515,636 2,431,728  
Domestic Operations          
Segment Reporting Information [Line Items]          
Total property and equipment, net 767,916 754,284 767,916 754,284 742,171
Total net sales 760,074 720,671 2,211,925 2,126,877  
Foreign Operations          
Segment Reporting Information [Line Items]          
Total property and equipment, net 104,393 137,587 104,393 137,587 $ 120,966
Total net sales $ 102,417 $ 104,587 $ 303,711 $ 304,851