Share Repurchases (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Aug. 02, 2013	Aug. 03, 2012	Jul. 29, 2011
Share Repurchases [Abstract]
Maximum amount of shares authorized to be repurchased	$ 100,000	$ 65,000	$ 65,000
Cost of shares repurchased	3,570	14,923	33,563
Shares of common stock repurchased (in shares)	44,300	265,538	676,600
Maximum aggregate purchase price, Next fiscal year	$ 50,000