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DERIVATIVE INSTRUMENTS (Tables)
 12 Months Ended
Dec. 31, 2015
DERIVATIVE INSTRUMENTS [Abstract]  
Realized and Unrealized Gains on Derivatives
The following tables detail (in thousands) the impact the feedstock and natural gas instruments had on the financial statements:

  
December 31,
 
  
2015
  
2014
  
2013
 
          
Realized gain (loss)
 
$
(180
)
 
$
(452
)
 
$
40
 
Unrealized gain (loss)
  
180
   
(132
)
  
(48
)
Net loss
 
$
-
  
$
(584
)
 
$
(8
)
Impact of Interest Rate Swap on Other Comprehensive Loss
The following tables detail (in thousands) the impact the agreement had on the financial statements:

  
December 31,
 
  
2015
  
2014
  
2013
 
Accumulated Other Comprehensive Income (Loss)
         
    Cumulative loss
 
$
-
  
$
-
  
$
(563
)
    Deferred tax benefit
  
-
   
-
   
197
 
    Net cumulative loss
 
$
-
  
$
-
  
$
(366
)
             
Interest expense reclassified from other
  comprehensive income (loss)
 
$
-
  
$
378
  
$
301
 
Commodity Financial Instruments [Member]  
Derivative [Line Items]  
Fair Value of Derivative Liabilities
  
December 31,
 
  
2015
  
2014
 
       
Fair value of derivative liability
 
$
-
  
$
180
 
Interest Rate Swaps [Member]  
Derivative [Line Items]  
Fair Value of Derivative Liabilities
  
December 31,
 
  
2015
  
2014
 
       
Fair value of derivative liability
 
$
177
  
$
378