Income Taxes	3 Months Ended
Feb. 28, 2017
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Our income tax provision for the three months ended February 28, 2017 and February 29, 2016 reflects our estimate of the effective tax rates expected to be applicable for the full fiscal years, adjusted for any discrete events which are recorded in the period they occur. The estimates are reevaluated each quarter based on our estimated tax expense for the full fiscal year. The increase in our effective tax rate in the three months ended February 28, 2017 compared to the same period in the prior year is primarily due to the fact that losses were incurred in a foreign jurisdiction for which no tax benefit is being provided. In addition, the first quarter of fiscal year 2016 benefited from a reinstatement of the research and development credit in the tax code in December 2015 with a retroactive effective date of January 1, 2015 that resulted in a tax benefit of $0.6 million for the period from January 2015 to November 2015. Our Federal income tax returns have been examined or are closed by statute for all years prior to fiscal year 2015. Our state income tax returns have been examined or are closed by statute for all years prior to fiscal year 2015. Tax authorities for certain non-U.S. jurisdictions are also examining returns, none of which are material to our consolidated balance sheets, cash flows or statements of income. With some exceptions, we are generally no longer subject to tax examinations in non-U.S. jurisdictions for years prior to fiscal year 2012.

Income Taxes

3 Months Ended

Feb. 28, 2017

Our income tax provision for the three months ended February 28, 2017 and February 29, 2016 reflects our estimate of the effective tax rates expected to be applicable for the full fiscal years, adjusted for any discrete events which are recorded in the period they occur. The estimates are reevaluated each quarter based on our estimated tax expense for the full fiscal year.

The increase in our effective tax rate in the three months ended February 28, 2017 compared to the same period in the prior year is primarily due to the fact that losses were incurred in a foreign jurisdiction for which no tax benefit is being provided. In addition, the first quarter of fiscal year 2016 benefited from a reinstatement of the research and development credit in the tax code in December 2015 with a retroactive effective date of January 1, 2015 that resulted in a tax benefit of $0.6 million for the period from January 2015 to November 2015.

Our Federal income tax returns have been examined or are closed by statute for all years prior to fiscal year 2015. Our state income tax returns have been examined or are closed by statute for all years prior to fiscal year 2015.

Tax authorities for certain non-U.S. jurisdictions are also examining returns, none of which are material to our consolidated balance sheets, cash flows or statements of income. With some exceptions, we are generally no longer subject to tax examinations in non-U.S. jurisdictions for years prior to fiscal year 2012.