Income Taxes	9 Months Ended
Jun. 30, 2017
Income Tax Disclosure [Abstract]
Income Taxes	8. Income Taxes During the three and nine months ended June 30, 2017, the Company recorded an income tax provision of $3.7 million and $9.9 million, respectively, which was driven primarily by foreign income. Tax provision recorded during the nine months ended June 30, 2017 was partially offset by $0.9 million of tax benefits related to the reduction of reserves for unrecognized tax benefits resulting from the expiration of statutes of limitations. During the three and nine months ended June 30, 2016, the Company recorded an income tax provision of $0.2 million and $75.1 million, respectively. The income tax provision of $0.2 million recorded during the third quarter of fiscal year 2016 was driven primarily by global income generated during the period, partially offset by $0.3 million of tax benefits related to the reduction of reserves for unrecognized tax benefits resulting from the expiration of statues of limitations. The tax provision of $75.1 million recorded during the nine months ended June 30, 2016 was driven primarily by the change in the valuation allowance against U.S. net deferred tax assets recognized during the second quarter of fiscal year 2016. Partially offsetting the valuation allowance provision were benefits related to pre-tax losses in the U.S., the reinstatement of the U.S. research and development tax credit retroactive to January 1, 2015, and reductions of reserves for unrecognized tax benefits resulting from the expiration of the statute of limitations. The Company evaluates the realizability of its deferred tax assets by tax-paying component and assesses the need for a valuation allowance on an annual and quarterly basis. The Company evaluates the profitability of each tax-paying component on a historic cumulative basis and on a forward looking basis in the course of performing this analysis. The Company evaluated all positive and negative evidence in concluding it was appropriate to establish a full valuation allowance against U.S. net deferred tax assets during the second quarter of fiscal year 2016. The Company maintained such allowance at June 30, 2017 and will continue to maintain it until there is sufficient positive evidence to support the reversal of all or some portion of these allowances. Please refer to Note 12, "Income Taxes" to the Company’s consolidated financial statements included in the 2016 Annual Report on Form 10‑K for further information on the valuation allowance. The Company is subject to U.S. federal income tax and various state, local and international income taxes in various jurisdictions. The amount of income taxes paid is subject to the Company’s interpretation of applicable tax laws in the jurisdictions in which it files tax returns. In the normal course of business, the Company is subject to income tax audits in various global jurisdictions in which it operates. The years subject to examination vary for the U.S. and international jurisdictions, with the earliest tax year being 2010. Based on the outcome of these examinations or the expiration of statutes of limitations for specific jurisdictions, it is reasonably possible that the related unrecognized tax benefits could change from those recorded in the Company’s unaudited Consolidated Balance Sheets. The Company currently anticipates that it is reasonably possible that the unrecognized tax benefits will be reduced by approximately $0.5 million within the next twelve months.

8. Income Taxes

During the three and nine months ended June 30, 2017, the Company recorded an income tax provision of $3.7 million and $9.9 million, respectively, which was driven primarily by foreign income. Tax provision recorded during the nine months ended June 30, 2017 was partially offset by $0.9 million of tax benefits related to the reduction of reserves for unrecognized tax benefits resulting from the expiration of statutes of limitations.

During the three and nine months ended June 30, 2016, the Company recorded an income tax provision of $0.2 million and $75.1 million, respectively. The income tax provision of $0.2 million recorded during the third quarter of fiscal year 2016 was driven primarily by global income generated during the period, partially offset by $0.3 million of tax benefits related to the reduction of reserves for unrecognized tax benefits resulting from the expiration of statues of limitations. The tax provision of $75.1 million recorded during the nine months ended June 30, 2016 was driven primarily by the change in the valuation allowance against U.S. net deferred tax assets recognized during the second quarter of fiscal year 2016. Partially offsetting the valuation allowance provision were benefits related to pre-tax losses in the U.S., the reinstatement of the U.S. research and development tax credit retroactive to January 1, 2015, and reductions of reserves for unrecognized tax benefits resulting from the expiration of the statute of limitations.

The Company evaluates the realizability of its deferred tax assets by tax-paying component and assesses the need for a valuation allowance on an annual and quarterly basis. The Company evaluates the profitability of each tax-paying component on a historic cumulative basis and on a forward looking basis in the course of performing this analysis. The Company evaluated all positive and negative evidence in concluding it was appropriate to establish a full valuation allowance against U.S. net deferred tax assets during the second quarter of fiscal year 2016. The Company maintained such allowance at June 30, 2017 and will continue to maintain it until there is sufficient positive evidence to support the reversal of all or some portion of these allowances. Please refer to Note 12, "Income Taxes" to the Company’s consolidated financial statements included in the 2016 Annual Report on Form 10‑K for further information on the valuation allowance.

The Company is subject to U.S. federal income tax and various state, local and international income taxes in various jurisdictions. The amount of income taxes paid is subject to the Company’s interpretation of applicable tax laws in the jurisdictions in which it files tax returns. In the normal course of business, the Company is subject to income tax audits in various global jurisdictions in which it operates. The years subject to examination vary for the U.S. and international jurisdictions, with the earliest tax year being 2010. Based on the outcome of these examinations or the expiration of statutes of limitations for specific jurisdictions, it is reasonably possible that the related unrecognized tax benefits could change from those recorded in the Company’s unaudited Consolidated Balance Sheets. The Company currently anticipates that it is reasonably possible that the unrecognized tax benefits will be reduced by approximately $0.5 million within the next twelve months.