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LONG-TERM DEBT (Details) - USD ($)
$ in Thousands
3 Months Ended
Oct. 28, 2017
Oct. 29, 2016
Jul. 29, 2017
Aug. 14, 2014
Long-term debt instrument        
Repayments of Long-term Debt $ 2,985 $ 367    
Long term debt, including current portion, carrying value 159,184   $ 161,991  
Interest expense 3,667 4,522    
Term loan        
Long-term debt instrument        
Repayments of Long-term Debt 2,500      
Long term debt, including current portion, carrying value 116,100      
Capital lease obligation        
Long-term debt instrument        
Interest Expense, Lessee, Assets under Capital Lease $ 400 400    
Lease Term 10 years      
Effective interest rate on debt 12.05%      
Capital Lease Obligation $ 12,900      
Sale Leaseback Financing Obligation        
Long-term debt instrument        
Long term debt, including current portion, carrying value $ 30,100      
Effective interest rate on debt 7.32%      
Interest expense $ 600 $ 600    
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