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EQUITY PLANS (Details 3) - Stock options - USD ($)
 12 Months Ended
Jul. 30, 2016
Aug. 01, 2015
Aug. 02, 2014
Number of Options      
Outstanding at beginning of year (in shares) 444,516    
Granted (in shares) 33,030    
Exercised (in shares) (84,110)    
Forfeited (in shares) 27,005    
Cancelled (in shares) 22,802    
Outstanding at end of year (in shares) 343,629 444,516  
Exercisable at end of year (in shares) 223,711    
Weighted Average Exercise Price      
Outstanding at beginning of year (in dollars per share) $ 46.97    
Granted (in dollars per share) 51.52    
Exercised (in dollars per share) 30.51    
Forfeited (in dollars per share) 64.43    
Cancelled (in dollars per share) 61.01    
Outstanding at end of year (in dollars per share) 49.13 $ 46.97  
Exercisable at end of year (in dollars per share) $ 42.99    
Weighted Average Remaining Contractual Term      
Outstanding at end of year 5 years 9 months 18 days    
Exercisable at end of year 4 years 8 months 12 days    
Aggregate Intrinsic Value      
Outstanding at end of year $ 2,586,141    
Exercisable at end of year $ 2,586,141    
Weighted average grant-date fair value of options granted (in dollars per share) $ 15.59 $ 14.82 $ 16.48
Aggregate intrinsic value of options exercised $ 2,600,000 $ 3,100,000 $ 2,500,000