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COMMITMENTS and CONTINGENCIES (Details)
$ in Thousands
3 Months Ended 12 Months Ended 33 Months Ended
Oct. 25, 2014
USD ($)
Jul. 25, 2015
union
Jul. 25, 2015
USD ($)
Jul. 27, 2013
USD ($)
Commitments and Contingencies Disclosure [Abstract]        
Insurance settlements receivable       $ 4,913
Insurance recoveries     $ 2,643  
Concentration Risk [Line Items]        
Insurance receivable write-off $ 2,270      
Number of unions | union   7    
Expiration period of union contracts   1 year    
Labor Force Concentration Risk | Workforce Subject to Collective Bargaining Arrangements        
Concentration Risk [Line Items]        
Percentage of employees covered by collective bargaining agreements   92.00% 92.00%  
Unionized Employees Concentration Risk | Workforce Subject to Collective Bargaining Arrangements Expired or Expiring within One Year        
Concentration Risk [Line Items]        
Percentage of employees covered by collective bargaining agreements   12.00% 12.00%