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Income Taxes
3 Months Ended
Apr. 04, 2015
Income Tax Disclosure [Abstract]  
Income Taxes
Income Taxes

We determine the tax provision for interim periods using an estimate of our annual effective tax rate, adjusted for discrete items, if any, that are taken into account in the relevant period. Each quarter we update our estimate of the annual effective tax rate, and if our estimated tax rate changes, we make a cumulative adjustment.

Our effective tax rate was 33.6% and 34.0% for the first three months of 2015 and 2014, respectively. This slight decrease in the effective tax rate in 2015 results from the favorability of net discrete items recorded in the first quarter of 2015 as compared to the first quarter of 2014.