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EQUITY PLANS (Details 4) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Aug. 01, 2015
Aug. 02, 2014
Aug. 03, 2013
Restricted stock awards and units      
Number of Shares      
Outstanding at July 28, 2012 (in shares) 640,737    
Granted (in shares) 371,569    
Vested (in shares) (259,671)    
Forfeited (in shares) (131,403)    
Outstanding at August 3, 2013 (in shares) 621,232 640,737  
Weighted Average Grant-Date Fair Value      
Outstanding at July 28, 2012 (in dollars per share) $ 55.77    
Granted (in dollars per share) 64.71    
Vested (in dollars per share) 51.04    
Forfeited (in dollars per share) 62.82    
Outstanding at August 3, 2013 (in dollars per share) $ 61.60 $ 55.77  
Intrinsic value $ 17.3 $ 16.9 $ 16.7
Graded vesting period for employees 4 years    
Performance-based share awards      
Number of Shares      
Granted (in shares)   22,229 25,000
Vested (in shares)     (30,818)
Weighted Average Grant-Date Fair Value      
Number of additional shares issued if performance exceeded specified targeted levels 23,238 22,229 25,000
Fair value of restricted shares and units vested     $ 1.9
Performance units      
Number of Shares      
Granted (in shares)   0 5,123
Weighted Average Grant-Date Fair Value      
Intrinsic value     $ 1.6
Number of additional shares issued if performance exceeded specified targeted levels 23,238   5,123
Performance Shares Units      
Number of Shares      
Granted (in shares)     695
Vested (in shares)   (19,396)  
Weighted Average Grant-Date Fair Value      
Granted (in dollars per share) $ 64.55 $ 67.48 $ 52.00
Intrinsic value $ 0.0 $ 1.3 $ 1.6
Fair value of restricted shares and units vested   $ 1.1  
New performance-based equity compensation arrangement with performance-based vesting component | Executive-leadership team      
Number of Shares      
Granted (in shares) 0   23,882
Weighted Average Grant-Date Fair Value      
Graded vesting period for employees 2 years    
Percentage of eligibility performance-based stock units based on grant date fair value 30.00%    
Percentage of eligibility performance-based stock units based on annual base salary 125.00%    
Percentage of eligibility performance-based stock units based on cash-based performance award 50.00%    
Percentage of additional grants increased (as a percent) 100.00%