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Comprehensive Income
6 Months Ended
Jun. 30, 2011
Comprehensive Income [Abstract]  
Comprehensive Income
Note C — Comprehensive Income
Comprehensive income was $318.2 million and $226.4 million for the six months ended June 30, 2011 and 2010, respectively. The difference between comprehensive income and net income was due to foreign currency translation adjustments and pension and other post-retirement benefit adjustments, as summarized below:
                 
    Six Months Ended June 30,  
    2011     2010  
    (in thousands)  
Net income
  $ 278,327     $ 225,076  
Other comprehensive income:
               
Foreign currency translation
    26,363       (8,067 )
 
               
Pension and other post-retirement benefit adjustments:
               
Recognition of prior service credit, net of tax
    (2,519 )     (2,502 )
Recognition of actuarial loss, net of tax
    16,028       11,926  
 
           
 
               
Total other comprehensive income
    39,872       1,357  
 
           
 
               
Comprehensive income
  $ 318,199     $ 226,433  
 
           
Comprehensive income for the three months ended June 30, 2011 and 2010 totaled $163.4 million and $99.5 million, respectively.