Income Taxes	9 Months Ended
Sep. 30, 2016
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes. Our provision for income taxes for the three months ended September 30, 2016 was a tax benefit of approximately $978,000, compared to a tax expense of approximately $1.8 million for the corresponding period of 2015. The income tax benefit recorded during the third quarter of 2016 was primarily due to a decrease in the estimated annual effective tax rate and certain discrete tax benefits recorded during the quarter. The decrease in the estimated annual effective tax rate was due primarily to shifts in the projected mix of earnings by jurisdiction during the three-month period ended September 30, 2016. The discrete tax benefits recorded during the quarter ended September 30, 2016 were primarily related to the release of certain liabilities related to unrecognized tax benefits due to statute of limitation expirations and favorable adjustments to research and development tax credits. Our provision for income taxes for the nine months ended September 30, 2016 and 2015 was a tax expense of approximately $3.1 million and a tax expense of approximately $7.3 million, respectively, which resulted in an effective tax rate of 20.0% and 29.4%, respectively. The decrease in the effective income tax rate for the nine-month period ended September 30, 2016, when compared to the corresponding period of 2015, was primarily related to shifts in our projected mix of earnings by jurisdiction during the three-month period ended September 30, 2016.

Income Taxes

9 Months Ended

Sep. 30, 2016

Income Taxes. Our provision for income taxes for the three months ended September 30, 2016 was a tax benefit of approximately $978,000, compared to a tax expense of approximately $1.8 million for the corresponding period of 2015. The income tax benefit recorded during the third quarter of 2016 was primarily due to a decrease in the estimated annual effective tax rate and certain discrete tax benefits recorded during the quarter. The decrease in the estimated annual effective tax rate was due primarily to shifts in the projected mix of earnings by jurisdiction during the three-month period ended September 30, 2016. The discrete tax benefits recorded during the quarter ended September 30, 2016 were primarily related to the release of certain liabilities related to unrecognized tax benefits due to statute of limitation expirations and favorable adjustments to research and development tax credits.

Our provision for income taxes for the nine months ended September 30, 2016 and 2015 was a tax expense of approximately $3.1 million and a tax expense of approximately $7.3 million, respectively, which resulted in an effective tax rate of 20.0% and 29.4%, respectively. The decrease in the effective income tax rate for the nine-month period ended September 30, 2016, when compared to the corresponding period of 2015, was primarily related to shifts in our projected mix of earnings by jurisdiction during the three-month period ended September 30, 2016.