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Schedule of Revenues and Long-Lived Assets, by Domestic and Foreign Operations Segment (Detail) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2019	Apr. 30, 2018	Jan. 31, 2019
Segment Reporting Information [Line Items]
Total property and equipment, net	$ 829,072	$ 819,725	$ 796,029
Total net sales	864,413	855,688
Domestic Operations
Segment Reporting Information [Line Items]
Total property and equipment, net	758,794	735,473	723,400
Total net sales	763,089	747,151
Foreign Operations
Segment Reporting Information [Line Items]
Total property and equipment, net	70,278	84,252	$ 72,629
Total net sales	$ 101,324	$ 108,537

X

- Definition

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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