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FAIR VALUE MEASUREMENTS (Tables)
12 Months Ended
Dec. 31, 2014
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 at December 31, 2014 and 2013:

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


 
   
Fair Value Measurements Using
 
December 31, 2013
 
Total
  
Level 1
  
Level 2
  
Level 3
 
   
(thousands of dollars)
 
Liabilities:
            
Interest rate swap
 $563  $-  $563  $- 
Commodity financial instruments
  48   48   -   -