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SIGNIFICANT ACCOUNTING POLICIES (Details 4) - USD ($)
$ in Thousands
 12 Months Ended
Jul. 30, 2016
Aug. 01, 2015
Aug. 02, 2014
Amortizing intangible assets:      
Gross Carrying Amount $ 200,913 $ 97,892  
Accumulated Amortization 34,315 25,717  
Net 166,598 72,175  
Total intangible assets      
Intangible assets, gross 256,629 151,547  
Intangible assets, net 222,314 125,830  
Amortization expense 8,900 7,800 $ 5,100
Estimated future amortization expense on finite lived intangible assets      
2014 15,099    
2015 14,720    
2016 14,704    
2017 14,047    
2018 13,130    
2022 and thereafter 94,898    
Net 166,598 72,175  
Customer relationships      
Amortizing intangible assets:      
Gross Carrying Amount 196,313 96,192  
Accumulated Amortization 33,447 25,364  
Net 162,866 70,828  
Estimated future amortization expense on finite lived intangible assets      
Net 162,866 70,828  
Noncompete Agreements      
Amortizing intangible assets:      
Gross Carrying Amount 2,900 1,700  
Accumulated Amortization 753 353  
Net 2,147 1,347  
Estimated future amortization expense on finite lived intangible assets      
Net 2,147 1,347  
Trademarks and tradenames      
Amortizing intangible assets:      
Gross Carrying Amount 1,700 0  
Accumulated Amortization 115 0  
Net 1,585 0  
Indefinite lived intangible assets:      
Indefinite lived intangible assets 55,716 53,655  
Estimated future amortization expense on finite lived intangible assets      
Net $ 1,585 $ 0