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DEBT (Tables)
 12 Months Ended
Dec. 31, 2015
DEBT [Abstract]  
Scheduled principal payments of the long-term debt outstanding
Scheduled principal payments of the long-term debt outstanding at December 31, 2015 are as follows (in thousands):


2016(1)
 
$
24,772
 
2017
  
18,813
 
2018
  
24,188
 
2019
  
119,415
 
Total long-term debt
  
187,188
 
Less: Current maturities of long-term debt
  
(24,772
)
Noncurrent portion of long-term debt
 
$
162,416
 

    (1) Includes an estimated $8.6 million excess cash flow payment due in 2016 based on 2015 results as per
         the terms of the CSA.