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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, 2018	Apr. 30, 2017	Jan. 31, 2018
Segment Reporting Information [Line Items]
Total property and equipment, net	$ 819,725	$ 851,259	$ 813,768
Total net sales	855,688	761,190
Domestic Operations
Segment Reporting Information [Line Items]
Total property and equipment, net	735,473	754,965	720,890
Total net sales	747,151	677,953
Foreign Operations
Segment Reporting Information [Line Items]
Total property and equipment, net	84,252	96,294	$ 92,878
Total net sales	$ 108,537	$ 83,237

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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