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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, 2019	Oct. 31, 2018	Oct. 31, 2019	Oct. 31, 2018	Jan. 31, 2019
Segment Reporting Information [Line Items]
Total property and equipment, net	$ 890,538	$ 808,883	$ 890,538	$ 808,883	$ 796,029
Total net sales	987,469	973,533	2,814,211	2,821,675
Domestic Operations
Segment Reporting Information [Line Items]
Total property and equipment, net	779,018	734,622	779,018	734,622	723,400
Total net sales	865,586	854,347	2,468,991	2,467,015
Foreign Operations
Segment Reporting Information [Line Items]
Total property and equipment, net	111,520	74,261	111,520	74,261	$ 72,629
Total net sales	$ 121,883	$ 119,186	$ 345,220	$ 354,660

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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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