Income Taxes	9 Months Ended
Aug. 31, 2013
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Our income tax provision for the third quarter of fiscal year 2013 and 2012 reflects our estimates 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 research and development credit was retroactively reinstated in January 2013. As a result, in the first quarter of fiscal year 2013 we recorded a tax benefit of $0.4 million related to qualifying research and development activities for the period from January 2012 to November 2012. The Internal Revenue Service finalized its examination of our U.S. Federal income tax returns for fiscal years 2009 and 2010 during the second quarter of fiscal year 2013. In the first quarter of fiscal year 2013, we had effectively settled certain unrecognized tax benefits which had been reserved in previous periods, reducing our unrecognized tax benefits liability by $1.2 million. Our Federal income tax returns have been examined or are closed by statute for all years prior to fiscal year 2011, and we are no longer subject to audit for those periods. State taxing authorities are currently examining our income tax returns for years through fiscal year 2010. Our state income tax returns have been examined or are closed by statute for all years prior to fiscal year 2005, and we are no longer subject to audit for those periods. Tax authorities for certain non-U.S. jurisdictions are also examining returns affecting unrecognized tax benefits, none of which are material to our condensed 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 2007.

Income Taxes

9 Months Ended

Aug. 31, 2013

Our income tax provision for the third quarter of fiscal year 2013 and 2012 reflects our estimates 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 research and development credit was retroactively reinstated in January 2013. As a result, in the first quarter of fiscal year 2013 we recorded a tax benefit of $0.4 million related to qualifying research and development activities for the period from January 2012 to November 2012.

The Internal Revenue Service finalized its examination of our U.S. Federal income tax returns for fiscal years 2009 and 2010 during the second quarter of fiscal year 2013. In the first quarter of fiscal year 2013, we had effectively settled certain unrecognized tax benefits which had been reserved in previous periods, reducing our unrecognized tax benefits liability by $1.2 million.

Our Federal income tax returns have been examined or are closed by statute for all years prior to fiscal year 2011, and we are no longer subject to audit for those periods. State taxing authorities are currently examining our income tax returns for years through fiscal year 2010. Our state income tax returns have been examined or are closed by statute for all years prior to fiscal year 2005, and we are no longer subject to audit for those periods.

Tax authorities for certain non-U.S. jurisdictions are also examining returns affecting unrecognized tax benefits, none of which are material to our condensed 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 2007.