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Income Taxes
6 Months Ended
Jun. 30, 2016
Income Taxes [Abstract]  
Income Taxes



Note 10.      Income Taxes 

 

Our effective income tax rate was 30.6% for both the three and six months ended June 30, 2016, as compared to 30.2% and 30.3% for the three and six months ended June 30, 2015, respectively. The increase in our effective rate for the three and six months ended June 30, 2016, as compared to the same periods of the prior year, was primarily related to an earnings mix, with relatively higher earnings subject to domestic tax rates as opposed to lower international tax rates, including the impact of foreign currency exchange rates. This increase in effective tax rates, period over period, was mostly offset by the U.S. R&D tax credit. There was no available R&D tax credit during the period ending June 30, 2015 because the credit had not yet been extended.  In December 2015, the R&D tax credit was permanently extended with retroactive application to January 1, 2015. As a result, we fully recognized the related 2015 tax benefit entirely in the fourth quarter of 2015.