Income Taxes	9 Months Ended
Sep. 30, 2017
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Company recognized income tax expense of $0.2 million and an income tax benefit of $0.3 million for the three months ended September 30, 2017 and 2016, respectively. The Company recognized income tax expense of $0.4 million and an income tax benefit of $7.1 million for the nine months ended September 30, 2017 and 2016, respectively. For the three and nine months ended September 30, 2017, the Company recorded income tax expense compared to an income tax benefit in the same periods of 2016 as no tax benefit was provided for losses incurred in United States Federal and certain state jurisdictions because those losses are offset by a full valuation allowance and the Company has recorded tax expense for foreign jurisdictions and certain state jurisdictions during this time period. In interim periods when a small change in forecasted information results in a significant change to the estimated annual effective tax rate and the income tax expense or benefit for an interim period, a discrete effective tax rate method may provide a more reliable estimate than applying the annual effective tax rate method to the year-to-date loss. The discrete method of calculating the Company's estimated effective tax rate and income tax expense or benefit uses actual results for the interim period(s), instead of forecasted information. For the third quarter of 2017, the Company used the discrete effective tax rate method to calculate the income tax expense. The Company is subject to periodic audits by domestic and foreign tax authorities. Due to the carryforward of unutilized net operating loss and credit carryovers, the Company's federal tax years from 2009 and forward are subject to examination by the U.S. authorities. The Company's state and foreign tax years for 2001 and forward are subject to examination by applicable tax authorities. The Company believes that it has appropriate support for the income tax positions taken on its tax returns and that its accruals for tax liabilities are adequate for all open years based on an assessment of many factors, including past experience and interpretations of tax laws applied to the facts of each matter.

Income Taxes

The Company recognized income tax expense of $0.2 million and an income tax benefit of $0.3 million for the three months ended September 30, 2017 and 2016, respectively. The Company recognized income tax expense of $0.4 million and an income tax benefit of $7.1 million for the nine months ended September 30, 2017 and 2016, respectively. For the three and nine months ended September 30, 2017, the Company recorded income tax expense compared to an income tax benefit in the same periods of 2016 as no tax benefit was provided for losses incurred in United States Federal and certain state jurisdictions because those losses are offset by a full valuation allowance and the Company has recorded tax expense for foreign jurisdictions and certain state jurisdictions during this time period.

In interim periods when a small change in forecasted information results in a significant change to the estimated annual effective tax rate and the income tax expense or benefit for an interim period, a discrete effective tax rate method may provide a more reliable estimate than applying the annual effective tax rate method to the year-to-date loss. The discrete method of calculating the Company's estimated effective tax rate and income tax expense or benefit uses actual results for the interim period(s), instead of forecasted information. For the third quarter of 2017, the Company used the discrete effective tax rate method to calculate the income tax expense.

The Company is subject to periodic audits by domestic and foreign tax authorities. Due to the carryforward of unutilized net operating loss and credit carryovers, the Company's federal tax years from 2009 and forward are subject to examination by the U.S. authorities. The Company's state and foreign tax years for 2001 and forward are subject to examination by applicable tax authorities. The Company believes that it has appropriate support for the income tax positions taken on its tax returns and that its accruals for tax liabilities are adequate for all open years based on an assessment of many factors, including past experience and interpretations of tax laws applied to the facts of each matter.