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COMMITMENTS and CONTINGENCIES (Details)
$ in Thousands
3 Months Ended 12 Months Ended 45 Months Ended
Apr. 23, 2016
USD ($)
Jul. 30, 2016
union
Jul. 25, 2015
USD ($)
Jul. 30, 2016
USD ($)
Jul. 26, 2014
USD ($)
Commitments and Contingencies Disclosure [Abstract]          
Insurance settlements receivable         $ 4,913
Insurance receivable write-off     $ (2,270)    
Insurance recoveries $ 940     $ 3,583  
Concentration Risk [Line Items]          
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   13.00%   13.00%