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Schedule of Revenues and Long-Lived Assets, by Domestic and Foreign Operations Segment (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jul. 31, 2020
Jul. 31, 2019
Jul. 31, 2020
Jul. 31, 2019
Jan. 31, 2020
Segment Reporting Information [Line Items]          
Total property and equipment, net $ 889,126 $ 867,434 $ 889,126 $ 867,434 $ 890,032
Total net sales 803,266 962,329 1,391,749 1,826,742  
Domestic Operations          
Segment Reporting Information [Line Items]          
Total property and equipment, net 722,934 774,378 722,934 774,378 763,411
Total net sales 709,697 840,316 1,233,253 1,603,405  
Foreign Operations          
Segment Reporting Information [Line Items]          
Total property and equipment, net 166,192 93,056 166,192 93,056 $ 126,621
Total net sales $ 93,569 $ 122,013 $ 158,496 $ 223,337