Income Taxes	6 Months Ended
Mar. 31, 2013
Income Taxes [Abstract]
Income Taxes	G. INCOME TAXES At the end of each interim reporting period, the Company makes an estimate for the annual effective income tax rate. Tax items included in the annual effective income tax rate are pro-rated for the full year and tax items discrete to a specific quarter are included in the effective income tax rate for that quarter. The estimate used in providing for income taxes on a year-to-date basis may change in subsequent interim periods. During the three months ended March 31, 2013 and 2012, the effective income tax rate was 23.5% and 38.1%, respectively, and for the six months ended March 31, 2013 and 2012, the effective income tax rate was 28.5% and 52.2%, respectively. The lower effective tax rate for the three months ended March 31, 2013, as compared to the same period of the prior year, was primarily due to the differences in the availability of the Federal Research and Development Tax Credit (Federal R&D Tax Credit), the utilization of loss carry forwards on Canadian income and the utilization of certain foreign tax credits. On January 2, 2013, the American Taxpayer Relief Act of 2012 was enacted which retroactively reinstated and extended the Federal R&D Tax Credit from January 1, 2012 to December 31, 2013. The current year effective tax rate reflects a full year benefit from the Federal R&D Tax Credit in the estimate of the annual effective income tax rate, whereas the prior year reflected only three months of the benefit. Additionally, the retroactive benefit for the previously expired period from January 1, 2012 to September 30, 2012 is reflected as a discrete item which lowered our effective tax rate for the three months ended March 31, 2013. The lower effective tax rate for the six months ended March 31, 2013, as compared to the same period of the prior year, was primarily due to the favorable impact of the extension of the Federal R&D Tax Credit, the utilization of loss carry forwards on Canadian income and the utilization of certain foreign tax credits. The effective tax rates for the second quarter of fiscal year 2012 and the first six months of fiscal year 2012 were negatively impacted by our inability to record a tax benefit related to pre-tax losses in Canada in fiscal year 2012.

Income Taxes

6 Months Ended

Mar. 31, 2013

G. INCOME TAXES

At the end of each interim reporting period, the Company makes an estimate for the annual effective income tax rate. Tax items included in the annual effective income tax rate are pro-rated for the full year and tax items discrete to a specific quarter are included in the effective income tax rate for that quarter. The estimate used in providing for income taxes on a year-to-date basis may change in subsequent interim periods. During the three months ended March 31, 2013 and 2012, the effective income tax rate was 23.5% and 38.1%, respectively, and for the six months ended March 31, 2013 and 2012, the effective income tax rate was 28.5% and 52.2%, respectively.

The lower effective tax rate for the three months ended March 31, 2013, as compared to the same period of the prior year, was primarily due to the differences in the availability of the Federal Research and Development Tax Credit (Federal R&D Tax Credit), the utilization of loss carry forwards on Canadian income and the utilization of certain foreign tax credits. On January 2, 2013, the American Taxpayer Relief Act of 2012 was enacted which retroactively reinstated and extended the Federal R&D Tax Credit from January 1, 2012 to December 31, 2013. The current year effective tax rate reflects a full year benefit from the Federal R&D Tax Credit in the estimate of the annual effective income tax rate, whereas the prior year reflected only three months of the benefit. Additionally, the retroactive benefit for the previously expired period from January 1, 2012 to September 30, 2012 is reflected as a discrete item which lowered our effective tax rate for the three months ended March 31, 2013.

The lower effective tax rate for the six months ended March 31, 2013, as compared to the same period of the prior year, was primarily due to the favorable impact of the extension of the Federal R&D Tax Credit, the utilization of loss carry forwards on Canadian income and the utilization of certain foreign tax credits. The effective tax rates for the second quarter of fiscal year 2012 and the first six months of fiscal year 2012 were negatively impacted by our inability to record a tax benefit related to pre-tax losses in Canada in fiscal year 2012.