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LONG-TERM DEBT (Tables)
 6 Months Ended
Jun. 30, 2017
LONG-TERM DEBT [Abstract]  
Long-term Debt
Long-term debt consisted of the following (in thousands):
  
June 30,
2017
  
December 31,
2016
 
       
Line of credit
 
$
162,600
  
$
147,600
 
Term loan
  
55,250
   
74,500
 
Promissory note payable in monthly installments at 2.9% through January 2021, collateralized by equipment
  
3,152
   
3,577
 
Less unamortized debt issuance costs
  
(744
)
  
(992
)
   
220,258
   
224,685
 
Less: Current portion
  
(217,974
)
  
(51,354
)
Long-term debt less current maturities
 
$
2,284
  
$
173,331