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Income Taxes (Details)
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Income Tax Disclosure [Abstract]        
Effective income tax rate 26.90% 24.10% 22.50% 22.40%
U.S. statutory income tax rate 35.00% 35.00% 35.00% 35.00%