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Income Taxes
9 Months Ended
Sep. 30, 2014
Income Tax Disclosure [Abstract]  
Income Taxes
Income Taxes
 
The effective tax rate on net income was 19.1% and 18.5% for the three and nine months ended September 30, 2014, respectively. The effective tax rate on net income was 25.1% and 25.9% for the three and nine months ended September 30, 2013, respectively. The effective tax rate in the third quarter and first nine months of 2014 was favorably impacted by a change in the geographical distribution of income, partially offset by the impact of certain discrete items.