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SIGNIFICANT ACCOUNTING POLICIES (Details 4) - USD ($)
$ in Thousands
 12 Months Ended
Jul. 28, 2018
Jul. 29, 2017
Jul. 30, 2016
Amortizing intangible assets:      
Gross Carrying Amount $ 201,846 $ 202,452  
Accumulated Amortization 64,438 49,926  
Net 137,408 152,526  
Total intangible assets      
Intangible assets, gross 257,647 258,215  
Intangible assets, net 193,209 208,289  
Amortization expense 15,000 15,200 $ 8,900
Estimated future amortization expense on finite lived intangible assets      
2014 15,147    
2015 14,520    
2016 13,622    
2017 12,337    
2018 12,845    
2023 and thereafter 68,937    
Net 137,408 152,526  
Customer relationships      
Amortizing intangible assets:      
Gross Carrying Amount 197,246 197,852  
Accumulated Amortization 61,543 48,044  
Net 135,703 149,808  
Estimated future amortization expense on finite lived intangible assets      
Net 135,703 149,808  
Non-compete agreements      
Amortizing intangible assets:      
Gross Carrying Amount 2,900 2,900  
Accumulated Amortization 1,914 1,334  
Net 986 1,566  
Estimated future amortization expense on finite lived intangible assets      
Net 986 1,566  
Trademarks and tradenames      
Amortizing intangible assets:      
Gross Carrying Amount 1,700 1,700  
Accumulated Amortization 981 548  
Net 719 1,152  
Indefinite lived intangible assets:      
Indefinite lived intangible assets 55,801 55,763  
Indefinite-Lived Intangible assets, accumulated amortization 0 0  
Estimated future amortization expense on finite lived intangible assets      
Net $ 719 $ 1,152