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Income Taxes
6 Months Ended
Jun. 30, 2014
Income Tax Disclosure [Abstract]  
Income Taxes
Income Taxes
 
The effective tax rate on net income was 17.5% and 18.3% for the three and six months ended June 30, 2014, respectively. The effective tax rate on net income was 26.4% and 26.2% for the three and six months ended June 30, 2013, respectively. The effective tax rate in the second quarter and first six months of 2014 was favorably impacted by a change in the geographical distribution of income and certain discrete items.