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Accumulated Comprehensive Income
3 Months Ended
Mar. 31, 2013
Accumulated Comprehensive Income [Abstract]  
Accumulated Comprehensive Income
14. Accumulated Comprehensive Income

Accumulated other comprehensive income (loss) in the consolidated balance sheet consists of the following (in thousands of dollars):

      
Defined
  
Defined
  
Accumulated
 
   
Foreign
  
Benefit
  
Benefit
  
Other
 
   
Currency
  
Pension
  
Postretirement
  
Comprehensive
 
   
Translation
  
Plans
  
Plans
  
Loss
 
              
Balance, December 31, 2012
 $14,415  $(91,514) $3,080  $(74,019)
                  
Current-period change
  (20,156)  1,688   (55)  (18,523)
                  
Balance, March 31, 2013
 $(5,741) $(89,826) $3,025  $(92,542)