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LONG-TERM DEBT (Details)
$ in Thousands
3 Months Ended
Jun. 25, 2016
USD ($)
item
Mar. 26, 2017
USD ($)
Mar. 26, 2016
USD ($)
Debt Instrument [Line Items]      
Current portion of loan outstanding $ 1,429  
Allowable leverage ratio 3.0   2.75
Loans Payable [Member]      
Debt Instrument [Line Items]      
Principal amount of loan $ 10,000    
Loan outstanding 9,800    
Current portion of loan outstanding 1,400    
Monthly principal payments 100    
Annual payments 1,400    
Amount due in 2022 3,000    
Revolving Credit Facility [Member]      
Debt Instrument [Line Items]      
Maximum borrowing capacity $ 30,000    
Ratio of consolidated EBITDA subject to a maximum borrowing restriction 3.0    
Number of consecutive quarters for which ratio of EBITDA subject to maximum borrowing restriction is required to be maintained under financial covenants | item 4    
Debt Instrument, Interest Rate, Stated Percentage 0.40%    
Maturity date Sep. 20, 2018    
Amount available $ 29,000    
Amount outstanding $ 17,600    
Revolving Credit Facility [Member] | Maximum [Member]      
Debt Instrument [Line Items]      
Interest rate for period 1.30%    
Revolving Credit Facility [Member] | Maximum [Member]      
Debt Instrument [Line Items]      
Interest rate for period 2.50%    
Revolving Credit Facility [Member] | Borrowings for Business Acquisitions [Member]      
Debt Instrument [Line Items]      
Maximum borrowing capacity $ 20,000    
Proceeds from Lines of Credit $ 6,900    
Revolving Credit Facility [Member] | Borrowings for Business Acquisitions [Member] | Scenario, Forecast [Member]      
Debt Instrument [Line Items]      
Maximum borrowing capacity   $ 15,000