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Income Taxes (Tables)
6 Months Ended
Jun. 30, 2014
Income Tax Disclosure [Abstract]  
Summary of Provision for Income Taxes and U.S. Federal Tax Rate

The provision for income taxes differs from amounts computed by applying the U.S. federal tax rate of 35% to income before income taxes for the three months ended June 30, 2014 and 2013 due to the following (in thousands):

 

     2014     2013  

Computed “expected” tax expense

   $ 44,784        35.0   $ 36,863        35.0

Changes resulting from:

        

Foreign income tax differential

     (5,761     (4.5     (4,082     (3.9

State taxes net of federal benefits

     1,466        1.2        1,337        1.3   

Foreign-sourced nontaxable income

     (3,484     (2.7     (2,785     (2.6

Other

     2,401        1.8        892        0.8   
  

 

 

   

 

 

   

 

 

   

 

 

 

Provision for income taxes

   $ 39,406        30.8   $ 32,225        30.6