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LONG-TERM DEBT (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Apr. 29, 2017
Apr. 30, 2016
Apr. 29, 2017
Apr. 30, 2016
Jul. 30, 2016
Aug. 14, 2014
Long-term debt instrument            
Repayments of Long-term Debt     $ 8,531 $ 8,320    
Long term debt, including current portion, carrying value $ 164,911   164,911   $ 173,593  
Interest expense 4,225 $ 4,384 13,188 11,734    
Term loan            
Long-term debt instrument            
Repayments of Long-term Debt     2,500      
Long term debt, including current portion, carrying value 121,000   121,000      
Capital lease obligation            
Long-term debt instrument            
Interest Expense, Lessee, Assets under Capital Lease $ 400 400 $ 1,200 1,300    
Lease Term     10 years      
Effective interest rate on debt 12.05%   12.05%      
Capital Lease Obligation $ 13,300   $ 13,300      
Sale Leaseback Financing Obligation            
Long-term debt instrument            
Long term debt, including current portion, carrying value $ 30,700   $ 30,700      
Effective interest rate on debt 7.32%   7.32%      
Interest expense $ 600 $ 600 $ 1,700 $ 1,800    
Minimum | Term loan            
Long-term debt instrument            
Long term debt, including current portion, carrying value 10,000   10,000      
Maximum | Term loan            
Long-term debt instrument            
Long term debt, including current portion, carrying value $ 50,000   $ 50,000      
Base Rate [Member] | Term loan            
Long-term debt instrument            
initial applicable margin     0.75%      
Federal Funds Effective Swap Rate [Member] | Term loan            
Long-term debt instrument            
Debt Instrument, Description of Variable Rate Basis     overnight federal funds effective rate      
Debt Instrument, Basis Spread on Variable Rate     0.50%      
One-month LIBOR | Term loan            
Long-term debt instrument            
Debt Instrument, Description of Variable Rate Basis     one-month LIBOR      
Debt Instrument, Basis Spread on Variable Rate     1.00%      
LIBOR | Term loan            
Long-term debt instrument            
Debt Instrument, Description of Variable Rate Basis     one, two, three or six months or, if approved by all affected lenders, nine months      
initial applicable margin     1.75%      
Term loan            
Long-term debt instrument            
Proceeds from borrowings of long-term debt           $ 150,000
Term loan | Minimum            
Long-term debt instrument            
Proceeds from Issuance of Debt     $ 10,000      
Term loan | Maximum            
Long-term debt instrument            
Proceeds from Issuance of Debt     $ 50,000