Income Taxes	3 Months Ended
Mar. 31, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Tax Cuts and Jobs Act On December 22, 2017, the U.S. government enacted comprehensive tax legislation commonly referred to as the Tax Cuts and Jobs Act (Tax Reform), making broad and complex changes to the U.S. tax code. The SEC staff issued Staff Accounting Bulletin (SAB) 118, which provides guidance on accounting for the tax effects of Tax Reform and allows for provisional adjustments recorded in the December 31, 2017 financial statements to be adjusted as calculations are completed during the measurement period. SAB 118 provides a measurement period that should not extend beyond one year from enactment for companies to complete the accounting under ASC 740, Income Taxes. As further discussed below, in accordance with SAB 118, the Company was able to complete final or provisional calculations for certain elements of Tax Reform, and the amounts and estimates are included in the financial statements and have been updated as additional information was gathered. For other elements, the Company was not yet able to make reasonable estimates, and therefore, those elements have not been recorded and are accounted for in accordance with ASC 740 on the basis of the tax laws in effect before Tax Reform. The Company’s accounting for the transition tax is incomplete. However, reasonable estimates of certain effects could be calculated, and a provisional adjustment of $16.0 million was recorded in the December 31, 2017 financial statements. To determine the amount of the transition tax, the Company must determine, in addition to other factors, the amount of post-1986 earnings and profits (E&P) of the relevant subsidiaries, as well as the amount of non-U.S. income taxes paid on such earnings. Based on revised E&P calculations updated during the measurement period, the Company recognized an additional measurement-period adjustment of $1.4 million to the transition tax obligation, with a corresponding adjustment of $1.4 million to tax expense, during the quarter ended March 31, 2018. A total transition tax obligation of $17.4 million has been recorded. Since the Company plans to elect to pay this liability over eight years, $15.8 million of the obligation is recorded in other long-term liabilities, with the balance recorded to accrued income taxes. The Company will continue to gather additional information to more precisely compute the final amount as further adjustments to E&P are determined. The Company expects to complete the accounting within the prescribed measurement period. The Company’s accounting for the indefinite reinvestment assertion is incomplete. However, a reasonable estimate of book and tax basis was calculated, and the Company made a provisional assertion. In general, it is the practice and intention of the Company to repatriate previously taxed earnings and to reinvest all other earnings of its non-U.S. subsidiaries. As part of Tax Reform, the Company incurred U.S. tax on substantially all of the earnings of its non-U.S. subsidiaries as part of the transition tax. This tax increased the Company’s previously taxed earnings and will allow for the repatriation of the majority of its foreign earnings without any residual U.S. federal tax. The Company does not believe that there is an excess of the financial reporting basis over the tax basis of investments in foreign subsidiaries. Accordingly, any repatriation in excess of previously taxed earnings will be a non-taxable return of basis. This assertion is subject to change as additional information is gathered to precisely compute the book and tax basis of the Company’s non-U.S. subsidiaries. The Company has not made any measurement-period adjustments related to its indefinite reinvestment assertion during the quarter ended March 31, 2018. However, the Company will continue to gather additional information and expects to complete the accounting within the measurement period. The Company’s accounting for the global intangible low-taxed income tax (GILTI) is incomplete. Due to the complexity of the new GILTI tax rules, the Company is continuing to evaluate this provision of Tax Reform and its application under ASC 740. Under U.S. GAAP, the Company is allowed to make an accounting policy choice of either (1) treating taxes due on future U.S. inclusions in taxable income related to GILTI as a current-period expense when incurred (the period cost method) or (2) factoring such amounts into the Company’s measurement of its deferred taxes (the deferred method). The Company’s selection of an accounting policy with respect to the new GILTI tax rules will depend, in part, on analyzing global income to determine whether future U.S. inclusions in taxable income related to GILTI are expected and, if so, the anticipated impact. Whether the Company expects to have future U.S. inclusions in taxable income related to GILTI depends not only on the current structure and estimated future results of global operations, but also on the Company’s intent and ability to modify the structure and/or the business. The Company has not made the accounting policy decision regarding whether to record deferred taxes on GILTI or expense taxes as incurred on GILTI. The current GILTI impact, which was immaterial for the quarter ended March 31, 2018, was recorded in the financial statements. The Company expects to complete the accounting for GILTI within the prescribed measurement period. Other Income Tax Matters The Company has $27.8 million of unrecognized tax benefits, including estimated interest and penalties, that have been recorded in other long-term liabilities in accordance with income tax accounting guidance and for which the Company is uncertain as to if or when such amounts may be settled.

Income Taxes

Tax Cuts and Jobs Act

On December 22, 2017, the U.S. government enacted comprehensive tax legislation commonly referred to as the Tax Cuts and Jobs Act (Tax Reform), making broad and complex changes to the U.S. tax code. The SEC staff issued Staff Accounting Bulletin (SAB) 118, which provides guidance on accounting for the tax effects of Tax Reform and allows for provisional adjustments recorded in the December 31, 2017 financial statements to be adjusted as calculations are completed during the measurement period. SAB 118 provides a measurement period that should not extend beyond one year from enactment for companies to complete the accounting under ASC 740, Income Taxes. As further discussed below, in accordance with SAB 118, the Company was able to complete final or provisional calculations for certain elements of Tax Reform, and the amounts and estimates are included in the financial statements and have been updated as additional information was gathered. For other elements, the Company was not yet able to make reasonable estimates, and therefore, those elements have not been recorded and are accounted for in accordance with ASC 740 on the basis of the tax laws in effect before Tax Reform.

The Company’s accounting for the transition tax is incomplete. However, reasonable estimates of certain effects could be calculated, and a provisional adjustment of $16.0 million was recorded in the December 31, 2017 financial statements. To determine the amount of the transition tax, the Company must determine, in addition to other factors, the amount of post-1986 earnings and profits (E&P) of the relevant subsidiaries, as well as the amount of non-U.S. income taxes paid on such earnings. Based on revised E&P calculations updated during the measurement period, the Company recognized an additional measurement-period adjustment of $1.4 million to the transition tax obligation, with a corresponding adjustment of $1.4 million to tax expense, during the quarter ended March 31, 2018. A total transition tax obligation of $17.4 million has been recorded. Since the Company plans to elect to pay this liability over eight years, $15.8 million of the obligation is recorded in other long-term liabilities, with the balance recorded to accrued income taxes. The Company will continue to gather additional information to more precisely compute the final amount as further adjustments to E&P are determined. The Company expects to complete the accounting within the prescribed measurement period.

The Company’s accounting for the indefinite reinvestment assertion is incomplete. However, a reasonable estimate of book and tax basis was calculated, and the Company made a provisional assertion. In general, it is the practice and intention of the Company to repatriate previously taxed earnings and to reinvest all other earnings of its non-U.S. subsidiaries. As part of Tax Reform, the Company incurred U.S. tax on substantially all of the earnings of its non-U.S. subsidiaries as part of the transition tax. This tax increased the Company’s previously taxed earnings and will allow for the repatriation of the majority of its foreign earnings without any residual U.S. federal tax. The Company does not believe that there is an excess of the financial reporting basis over the tax basis of investments in foreign subsidiaries. Accordingly, any repatriation in excess of previously taxed earnings will be a non-taxable return of basis. This assertion is subject to change as additional information is gathered to precisely compute the book and tax basis of the Company’s non-U.S. subsidiaries. The Company has not made any measurement-period adjustments related to its indefinite reinvestment assertion during the quarter ended March 31, 2018. However, the Company will continue to gather additional information and expects to complete the accounting within the measurement period.

The Company’s accounting for the global intangible low-taxed income tax (GILTI) is incomplete. Due to the complexity of the new GILTI tax rules, the Company is continuing to evaluate this provision of Tax Reform and its application under ASC 740. Under U.S. GAAP, the Company is allowed to make an accounting policy choice of either (1) treating taxes due on future U.S. inclusions in taxable income related to GILTI as a current-period expense when incurred (the period cost method) or (2) factoring such amounts into the Company’s measurement of its deferred taxes (the deferred method). The Company’s selection of an accounting policy with respect to the new GILTI tax rules will depend, in part, on analyzing global income to determine whether future U.S. inclusions in taxable income related to GILTI are expected and, if so, the anticipated impact. Whether the Company expects to have future U.S. inclusions in taxable income related to GILTI depends not only on the current structure and estimated future results of global operations, but also on the Company’s intent and ability to modify the structure and/or the business. The Company has not made the accounting policy decision regarding whether to record deferred taxes on GILTI or expense taxes as incurred on GILTI. The current GILTI impact, which was immaterial for the quarter ended March 31, 2018, was recorded in the financial statements. The Company expects to complete the accounting for GILTI within the prescribed measurement period.

Other Income Tax Matters

The Company has $27.8 million of unrecognized tax benefits, including estimated interest and penalties, that have been recorded in other long-term liabilities in accordance with income tax accounting guidance and for which the Company is uncertain as to if or when such amounts may be settled.