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, 2019	Jul. 31, 2018	Jul. 31, 2019	Jul. 31, 2018	Jan. 31, 2019
Segment Reporting Information [Line Items]
Total property and equipment, net	$ 867,434	$ 807,084	$ 867,434	$ 807,084	$ 796,029
Total net sales	962,329	992,454	1,826,742	1,848,142
Domestic Operations
Segment Reporting Information [Line Items]
Total property and equipment, net	774,378	730,024	774,378	730,024	723,400
Total net sales	840,316	865,517	1,603,405	1,612,668
Foreign Operations
Segment Reporting Information [Line Items]
Total property and equipment, net	93,056	77,060	93,056	77,060	$ 72,629
Total net sales	$ 122,013	$ 126,937	$ 223,337	$ 235,474

Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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-Section S99
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-Subparagraph (SX 210.5-02(14))
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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