v2.4.0.6
Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2012
Significant Accounting Policies [Abstract]  
Summary of allowance for losses progression
                         

Allowance for Losses Progression (In Thousands of Dollars)

   2012     2011     2010  

Beginning balance January 1

   $ 2,102     $ 2,582     $ 2,278  

(Write offs) of bad debts, net of collections of previous write offs

     (38 )      (480 )      4  

Bad debt provision

     —         —         300  
   

 

 

    

 

 

    

 

 

  

Ending balance at December 31

   $ 2,064     $ 2,102     $ 2,582