EQUITY PLANS (Details 3) (Stock options, USD $)	12 Months Ended
	Jul. 28, 2012 Y	Jul. 30, 2011	Jul. 31, 2010
Stock options
Stock option activity
Outstanding at beginning of year (in shares)	664,048
Granted (in shares)	93,800
Exercised (in shares)	(277,977)
Forfeited (in shares)	(35,289)
Cancelled (in shares)	(3,750)
Outstanding at end of year (in shares)	440,832	664,048
Exercisable at end of year (in shares)	211,781
Stock options, Weighted Average Exercise Price
Outstanding at beginning of year (in dollars per share)	$ 28.40
Granted (in dollars per share)	$ 38.07
Exercised (in dollars per share)	$ 27.24
Forfeited (in dollars per share)	$ 27.83
Cancelled (in dollars per share)	$ 28.16
Outstanding at end of year (in dollars per share)	$ 31.24	$ 28.40
Exercisable at end of year (in dollars per share)	$ 30.12
Weighted Average Remaining Contractual Term (in years)
Outstanding at end of year (in years)	6.6
Exercisable at end of year (in years)	5.0
Aggregate Intrinsic Value
Outstanding at end of year (in dollars)	$ 10,306,862
Exercisable at end of year (in dollars)	5,188,171
Weighted average grant-date fair value of options granted (in dollars per share)	$ 10.27	$ 10.64	$ 7.73
Aggregate intrinsic value of options exercised	$ 5,200,000	$ 3,900,000	$ 4,600,000