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Schedule of Revenues and Long-Lived Assets, by Domestic and Foreign Operations Segment (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 31, 2015	Jan. 31, 2014	Jan. 31, 2013
Segment Reporting Information [Line Items]
Total net sales	$ 3,323,077us-gaap_SalesRevenueNet	$ 3,086,608us-gaap_SalesRevenueNet	$ 2,794,925us-gaap_SalesRevenueNet
Total property and equipment, net	889,232us-gaap_PropertyPlantAndEquipmentNet	806,909us-gaap_PropertyPlantAndEquipmentNet
Domestic Operations
Segment Reporting Information [Line Items]
Total net sales	2,870,140	2,685,042	2,423,155
Total property and equipment, net	745,504	655,866
Foreign Operations
Segment Reporting Information [Line Items]
Total net sales	452,937	401,566	371,770
Total property and equipment, net	$ 143,728	$ 151,043