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FAIR VALUE MEASUREMENTS (Tables)
12 Months Ended
Dec. 31, 2016
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, 2016 and 2015:

  
Fair Value Measurements Using
 
December 31, 2016
 
Total
  
Level 1
  
Level 2
  
Level 3
 
  
(thousands of dollars)
 
Liabilities:
            
Interest rate swap
 
$
58
  
$
-
  
$
58
  
$
-
 


  
Fair Value Measurements Using
 
December 31, 2015
 
Total
  
Level 1
  
Level 2
  
Level 3
 
  
(thousands of dollars)
 
Liabilities:
            
Interest rate swap
 
$
177
  
$
-
  
$
177
  
$
-