SECONDARY COMMON STOCK OFFERING (Details) (USD $) In Thousands, except Share data	3 Months Ended	12 Months Ended
	Oct. 30, 2010	Jul. 30, 2011	Jul. 31, 2010	Aug. 01, 2009
SECONDARY COMMON STOCK OFFERING
Issuance of common stock pursuant to secondary offering, including shares issued to cover the underwriters 8217; overallotment option (in shares)	4,427,500
Price per share of common stock shares issued (in dollars per share)	$ 33.00
Net proceeds		$ 138,301	$ 7,143	$ 1,039