Income Taxes	3 Months Ended
Mar. 31, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Company recorded a net income tax benefit of approximately $0.3 million and an immaterial expense for the three months ended March 31, 2018 and 2017, respectively. The net income tax benefit recorded during the three months ended March 31, 2018 is primarily related to the loss before income tax expense. For the three months ended March 31, 2018, the Company’s effective tax rate (AETR) from operations is (5.6)%, compared to (0.1)% for the three months ended March 31, 2017. The difference between the Company’s effective tax rate and the current U.S. statutory rate of 21% is primarily related to permanent items. The difference in the effective tax rate for the three months ended March 31, 2018 compared to the three months ended March 31, 2017 is as a result of a discrete item related to a windfall tax benefit from stock based compensation. As of each reporting date, management considers new evidence, both positive and negative, that could affect its view of the future realization of deferred tax assets (primarily federal and state net operating losses (NOLs). As of March 31, 2018 and December 31, 2017, the Company has a valuation allowance related to acquired state NOLs that the Company believes it is not more likely than not will be realized. During the three months ended March 31, 2018 and 2017, the Company had no material changes in uncertain tax positions. The Tax Cuts and Jobs Act (“the Act”) was enacted on December 22, 2017. The Act reduced the U.S. federal corporate income tax rate from 35% to 21%, requires companies to pay a one-time transition tax on the accumulated earnings of certain foreign subsidiaries, and creates new taxes on certain foreign-sourced earnings. At December 31, 2017, the Company made a reasonable estimate of the one-time transition tax on accumulated foreign earnings as well as the impact of the Act on its existing deferred tax balances. As discussed below, the Company has not completed its accounting for the tax effects of the Act as of March 31, 2018. The one-time transition tax is based on the Company’s total post-acquisition earnings and profits (“E&P”) of its German subsidiaries in October 2017, for which the accrual of U.S. income taxes had previously been deferred. The Company recorded a provisional amount for its one-time transition tax liability at December 31, 2017 which was considered immaterial, and has not adjusted this amount as of March 31, 2018. The Company has not yet completed its calculation of the total foreign E&P for these foreign subsidiaries. Further, the transition tax is impacted in part by the amount of those earnings held in cash and other specified assets. Accordingly, the Company’s estimate of the one-time transition tax may change when it finalizes the calculation of the foreign E&P previously deferred from U.S. federal taxation and finalizes the amounts held in cash or other specified assets. At December 31, 2017, the Company re-measured certain deferred tax assets and liabilities based on the rates at which they are expected to reverse in the future, which is generally 21%. A provisional tax benefit of $7.7 million was recorded, and no adjustment was recorded to this estimate in during the three months ended March 31, 2018. The Company is still analyzing certain aspects of the Act and refining its calculations, which could potentially affect the measurement of these balances. The global intangible low-taxed income (GILTI) provisions of the Act impose a tax on the GILTI earned by certain foreign subsidiaries. The FASB Staff Q&A, Topic 740, No. 5, Accounting for Global Intangible Low-Taxed Income, states that an entity can make an accounting policy election to either recognize deferred taxes for temporary basis differences expected to reverse as GILTI in future years or provide for the tax expense related to GILTI in the year the tax is incurred. No estimate was recorded for GILTI as of December 31, 2017. At March 31, 2018, the Company determined the tax expense resulting from GILTI provisions and future income subject to the GILTI provisions, resulting in an inconsequential expense for the three months ended March 31, 2018.

Income Taxes

The Company recorded a net income tax benefit of approximately $0.3 million and an immaterial expense for the three months ended March 31, 2018 and 2017, respectively. The net income tax benefit recorded during the three months ended March 31, 2018 is primarily related to the loss before income tax expense.

For the three months ended March 31, 2018, the Company’s effective tax rate (AETR) from operations is (5.6)%, compared to (0.1)% for the three months ended March 31, 2017. The difference between the Company’s effective tax rate and the current U.S. statutory rate of 21% is primarily related to permanent items. The difference in the effective tax rate for the three months ended March 31, 2018 compared to the three months ended March 31, 2017 is as a result of a discrete item related to a windfall tax benefit from stock based compensation.

As of each reporting date, management considers new evidence, both positive and negative, that could affect its view of the future realization of deferred tax assets (primarily federal and state net operating losses (NOLs). As of March 31, 2018 and December 31, 2017, the Company has a valuation allowance related to acquired state NOLs that the Company believes it is not more likely than not will be realized.

During the three months ended March 31, 2018 and 2017, the Company had no material changes in uncertain tax positions.

The Tax Cuts and Jobs Act (“the Act”) was enacted on December 22, 2017. The Act reduced the U.S. federal corporate income tax rate from 35% to 21%, requires companies to pay a one-time transition tax on the accumulated earnings of certain

foreign subsidiaries, and creates new taxes on certain foreign-sourced earnings. At December 31, 2017, the Company made a reasonable estimate of the one-time transition tax on accumulated foreign earnings as well as the impact of the Act on its existing deferred tax balances. As discussed below, the Company has not completed its accounting for the tax effects of the Act as of March 31, 2018.

The one-time transition tax is based on the Company’s total post-acquisition earnings and profits (“E&P”) of its German subsidiaries in October 2017, for which the accrual of U.S. income taxes had previously been deferred. The Company recorded a provisional amount for its one-time transition tax liability at December 31, 2017 which was considered immaterial, and has not adjusted this amount as of March 31, 2018. The Company has not yet completed its calculation of the total foreign E&P for these foreign subsidiaries. Further, the transition tax is impacted in part by the amount of those earnings held in cash and other specified assets. Accordingly, the Company’s estimate of the one-time transition tax may change when it finalizes the calculation of the foreign E&P previously deferred from U.S. federal taxation and finalizes the amounts held in cash or other specified assets.

At December 31, 2017, the Company re-measured certain deferred tax assets and liabilities based on the rates at which they are expected to reverse in the future, which is generally 21%. A provisional tax benefit of $7.7 million was recorded, and no adjustment was recorded to this estimate in during the three months ended March 31, 2018. The Company is still analyzing certain aspects of the Act and refining its calculations, which could potentially affect the measurement of these balances.

The global intangible low-taxed income (GILTI) provisions of the Act impose a tax on the GILTI earned by certain foreign subsidiaries. The FASB Staff Q&A, Topic 740, No. 5, Accounting for Global Intangible Low-Taxed Income, states that an entity can make an accounting policy election to either recognize deferred taxes for temporary basis differences expected to reverse as GILTI in future years or provide for the tax expense related to GILTI in the year the tax is incurred. No estimate was recorded for GILTI as of December 31, 2017. At March 31, 2018, the Company determined the tax expense resulting from GILTI provisions and future income subject to the GILTI provisions, resulting in an inconsequential expense for the three months ended March 31, 2018.