Income Taxes	3 Months Ended
Dec. 31, 2017
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes For each interim reporting period, the Company makes an estimate of the effective tax rate it expects to be applicable for the full fiscal year for its operations. This estimated effective rate is used in providing for income taxes on a year-to-date basis. The Company’s effective tax rate through the first three months of fiscal 2018 was 21%, compared with (14)% for the same period of fiscal 2017. This increase is primarily driven by discrete tax benefits of $718 primarily related to tax legislation enacted during the first quarter of fiscal 2018 and tax impacts related to the sale of the Cork, Ireland building discussed further in Note 10, Assets Held for Sale and Disposal, partially offset by an increase in year-to-date non-U.S. income in the first quarter of fiscal 2018 compared with the first quarter of fiscal 2017. The effective tax rate differs from the U.S. federal statutory rate due primarily to the valuation allowance against the Company's U.S. deferred tax assets and income in foreign jurisdictions that are taxed at different rates that the U.S. statutory tax rate. In the first quarter of fiscal 2018, the U.S. enacted the Act which, among other items, reduces the U.S. corporate tax rate effective January 1, 2018 from 35% to 21%, creates a participation exemption regime for future distributions of foreign earnings, imposes a one-time transition tax on a taxpayer’s foreign subsidiaries’ earnings not previously subject to U.S. taxation and creates new taxes on certain foreign-sourced earnings. The decrease in the U.S. federal corporate tax rate from 35% to 21% results in a blended statutory tax rate of 24.5% for the fiscal year ending September 30, 2018. The new taxes for certain foreign-sourced earnings under the Act are effective for the Company after the fiscal year ending September 30, 2018. The Company revalued its gross U.S. deferred taxes and the related valuation allowance, as a result of the Act. The revaluation, which is considered complete, resulted in a discrete tax benefit of $198 during the first quarter of fiscal 2018. Other provisions of the Act, including the one-time transition tax, are considered provisional as final transition impacts of the Act may differ from the above estimate, due to changes in interpretations of the Act, any legislative action to address questions that arise because of the Act, or any updates or changes to estimates the company has utilized to calculate the transition impacts, including impacts from changes to current year earnings estimates and foreign exchange rates of foreign subsidiaries. As a result of the valuation allowance in the U.S. on tax attribute carryforwards, as of the first quarter of fiscal 2018 no charge to tax expense was recorded related to the one-time transition tax. Additionally, the Company released $305 of valuation allowance in the first quarter of fiscal 2018 on a portion of its U.S. deferred tax assets as a result of deferred tax liabilities for indefinite lived intangible assets now available as a source of income as a result of the Act. The change in assessment of the realization of deferred taxes as a result of the Act is provisional as of the first quarter of fiscal 2018 as the Company will continue to analyze the necessary information and evaluate assumptions made in its assessment of the realization of its deferred tax assets. The Company is subject to income taxes in the U.S. federal jurisdiction, Ireland, Italy, and various state and local jurisdictions. The Company believes it has appropriate support for its federal income tax returns.

Income Taxes

For each interim reporting period, the Company makes an estimate of the effective tax rate it expects to be applicable for the full fiscal year for its operations. This estimated effective rate is used in providing for income taxes on a year-to-date basis. The Company’s effective tax rate through the first three months of fiscal 2018 was 21%, compared with (14)% for the same period of fiscal 2017. This increase is primarily driven by discrete tax benefits of $718 primarily related to tax legislation enacted during the first quarter of fiscal 2018 and tax impacts related to the sale of the Cork, Ireland building discussed further in Note 10, Assets Held for Sale and Disposal, partially offset by an increase in year-to-date non-U.S. income in the first quarter of fiscal 2018 compared with the first quarter of fiscal 2017. The effective tax rate differs from the U.S. federal statutory rate due primarily to the valuation allowance against the Company's U.S. deferred tax assets and income in foreign jurisdictions that are taxed at different rates that the U.S. statutory tax rate.

In the first quarter of fiscal 2018, the U.S. enacted the Act which, among other items, reduces the U.S. corporate tax rate effective January 1, 2018 from 35% to 21%, creates a participation exemption regime for future distributions of foreign earnings, imposes a one-time transition tax on a taxpayer’s foreign subsidiaries’ earnings not previously subject to U.S. taxation and creates new taxes on certain foreign-sourced earnings. The decrease in the U.S. federal corporate tax rate from 35% to 21% results in a blended statutory tax rate of 24.5% for the fiscal year ending September 30, 2018. The new taxes for certain foreign-sourced earnings under the Act are effective for the Company after the fiscal year ending September 30, 2018.

The Company revalued its gross U.S. deferred taxes and the related valuation allowance, as a result of the Act. The revaluation, which is considered complete, resulted in a discrete tax benefit of $198 during the first quarter of fiscal 2018. Other provisions of the Act, including the one-time transition tax, are considered provisional as final transition impacts of the Act may differ from the above estimate, due to changes in interpretations of the Act, any legislative action to address questions that arise because of the Act, or any updates or changes to estimates the company has utilized to calculate the transition impacts, including impacts from changes to current year earnings estimates and foreign exchange rates of foreign subsidiaries. As a result of the valuation allowance in the U.S. on tax attribute carryforwards, as of the first quarter of fiscal 2018 no charge to tax expense was recorded related to the one-time transition tax. Additionally, the Company released $305 of valuation allowance in the first quarter of fiscal 2018 on a portion of its U.S. deferred tax assets as a result of deferred tax liabilities for indefinite lived intangible assets now available as a source of income as a result of the Act. The change in assessment of the realization of deferred taxes as a result of the Act is provisional as of the first quarter of fiscal 2018 as the Company will continue to analyze the necessary information and evaluate assumptions made in its assessment of the realization of its deferred tax assets.

The Company is subject to income taxes in the U.S. federal jurisdiction, Ireland, Italy, and various state and local jurisdictions. The Company believes it has appropriate support for its federal income tax returns.