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Supplemental Cash Flow Information
6 Months Ended
Jun. 30, 2011
Notes to Financial Statements [Abstract]  
Supplemental Cash Flow Information

   
Six months ended June 30,
 
   
2011
  
2010
 
Cash paid for:
      
Interest
 $11,148  $9,292 
Income taxes (1)
  27,685   1,881 
          
Cash received for:
        
Interest
  199   214 
Income tax refunds
     18,171 

(1)
We paid withholding taxes in Iceland of $26,900 in the first quarter of 2011.  
 
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.