CONDENSED CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Nov. 01, 2014	Nov. 02, 2013
Income Statement [Abstract]
Net sales	$ 1,992,476	$ 1,602,011
Cost of sales	1,673,480	1,330,835
Gross profit	318,996	271,176
Operating expenses	260,048	223,150
Restructuring and asset impairment expenses	555	0
Total operating expenses	260,603	223,150
Operating income	58,393	48,026
Other expense (income):
Interest expense	3,255	1,854
Interest income	(93)	(120)
Other, net	616	19
Total other expense, net	3,778	1,753
Income before income taxes	54,615	46,273
Provision for income taxes	21,573	18,509
Net income	$ 33,042	$ 27,764
Basic per share data:
Net income (usd per share)	$ 0.66	$ 0.56
Weighted average basic shares of common stock outstanding	49,889	49,439
Diluted per share data:
Net income (usd per share)	$ 0.66	$ 0.56
Weighted average diluted shares of common stock outstanding	50,113	49,735