Quarterly report pursuant to Section 13 or 15(d)

TRADE RECEIVABLES (Tables)

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TRADE RECEIVABLES (Tables)
6 Months Ended
Jun. 30, 2014
TRADE RECEIVABLES [Abstract]  
Trade Receivables
Trade receivables, net, at June 30, 2014, and December 31, 2013, consisted of the following:

   
June 30, 2014
   
December 31, 2013
 
   
(thousands of dollars)
 
Trade receivables
  $ 28,386     $ 22,279  
Less allowance for doubtful accounts
    (210 )     (210 )
    Trade receivables, net
  $ 28,176     $ 22,069