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FAIR VALUE MEASUREMENTS (Tables)
6 Months Ended
Jun. 30, 2015
FAIR VALUE MEASUREMENTS [Abstract]  
Fair Value of Assets and Liabilities Measured on a Recurring Basis
The following items are measured at fair value on a recurring basis subject to disclosure requirements of ASC Topic 820 at June 30, 2015, and December 31, 2014:

Assets and Liabilities Measured at Fair Value on a Recurring Basis

      
Fair Value Measurements Using
 
   
June 30, 2015
  
Level 1
  
Level 2
  
Level 3
 
   
(thousands of dollars)
 
Liabilities:
            
Interest rate swap
 $269   -  $269   - 

      
Fair Value Measurements Using
 
   
December 31, 2014
  
Level 1
  
Level 2
  
Level 3
 
   
(thousands of dollars)
 
Liabilities:
            
Interest rate swap
 $378   -  $378   - 
Commodity financial instruments
  180   180   -   -