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Supplemental Cash Flow Information
9 Months Ended
Sep. 30, 2011
Supplemental Cash Flow Information [Abstract] 
Supplemental Cash Flow Information
11.
Supplemental cash flow information

   
Nine months ended September 30,
 
   
2011
  
2010
 
Cash paid for:
      
Interest
 $11,257  $9,813 
Income taxes (1)
  41,694   3,101 
          
Cash received for:
        
Interest
  225   371 
Income tax refunds
  204   18,171 

(1)
We paid withholding taxes in Iceland of $26,900 and $12,486 in the first and third quarters of 2011, respectively.  

 
Non-cash activities
 
In the first quarter of 2010, we issued shares of common stock as part of our performance share program to satisfy a $964 performance share liability to certain key employees.