CONDENSED CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Apr. 28, 2012	Apr. 30, 2011	Apr. 28, 2012	Apr. 30, 2011
Net sales	$ 1,388,023	$ 1,203,983	$ 3,892,361	$ 3,371,399
Cost of sales	1,143,492	985,439	3,207,570	2,761,891
Gross profit	244,531	218,544	684,791	609,508
Operating expenses	195,856	179,638	567,330	509,004
Restructuring and asset impairment expenses	37		5,255	200
Total operating expenses	195,893	179,638	572,585	509,204
Operating income	48,638	38,906	112,206	100,304
Other expense (income):
Interest expense	1,111	1,146	3,566	3,830
Interest income	(176)	(750)	(565)	(1,015)
Other, net	(205)	(427)	(37)	(682)
Total other expense (income)	730	(31)	2,964	2,133
Income before income taxes	47,908	38,937	109,242	98,171
Provision for income taxes	18,876	15,575	43,042	38,676
Net income	$ 29,032	$ 23,362	$ 66,200	$ 59,495
Basic per share data:
Net income (in dollars per share)	$ 0.59	$ 0.48	$ 1.36	$ 1.26
Weighted average basic shares of common stock outstanding (in shares)	48,848	48,406	48,717	47,129
Diluted per share data:
Net income (in dollars per share)	$ 0.59	$ 0.48	$ 1.35	$ 1.25
Weighted average diluted shares of common stock outstanding (in shares)	49,207	48,793	49,017	47,470