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Comprehensive Earnings (Tables)
6 Months Ended
Jun. 30, 2011
Comprehensive Earnings [Abstract]  
Comprehensive earnings
Comprehensive earnings were as follows:

   
Three Months Ended June 30,
  
Six Months Ended June 30,
 
   
2011
  
2010
  
2011
  
2010
 
Net earnings
 $249,769  $169,870  $444,674  $277,997 
Foreign currency translation adjustment, net of tax
  18,760   (86,198)  90,944   (171,465)
Other, net of tax
  875   609   352   1,949 
Comprehensive earnings
 $269,404  $84,281  $535,970  $108,481