Income Taxes	9 Months Ended
Oct. 01, 2016
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 30.7% and 32.6% for the first nine months of 2016 and 2015, respectively. The decrease in the 2016 effective tax rate is primarily the result of the permanent reinstatement of the U.S. research and development tax credit in December 2015.

Income Taxes

9 Months Ended

Oct. 01, 2016

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 30.7% and 32.6% for the first nine months of 2016 and 2015, respectively. The decrease in the 2016 effective tax rate is primarily the result of the permanent reinstatement of the U.S. research and development tax credit in December 2015.