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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, 2018 | Oct. 31, 2017 | Oct. 31, 2018 | Oct. 31, 2017 | Jan. 31, 2018
Segment Reporting Information [Line Items] |  |  |  |  |
Total property and equipment, net | $ 808,883 | $ 829,106 | $ 808,883 | $ 829,106 | $ 813,768
Total net sales | 973,533 | 892,774 | 2,821,675 | 2,526,895 |
Domestic Operations |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total property and equipment, net | 734,622 | 735,731 | 734,622 | 735,731 | 720,890
Total net sales | 854,347 | 779,790 | 2,467,015 | 2,222,589 |
Foreign Operations |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total property and equipment, net | 74,261 | 93,375 | 74,261 | 93,375 | $ 92,878
Total net sales | $ 119,186 | $ 112,984 | $ 354,660 | $ 304,306 |

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