INCOME TAXES	6 Months Ended
Jun. 30, 2018
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXES At the end of each interim period, the Company makes its best estimate of the annual expected effective income tax rate and applies that rate to its ordinary year-to-date earnings or loss. The income tax provision or benefit related to significant, unusual, or extraordinary items, if applicable, that will be separately reported or reported net of their related tax effects are individually computed and recognized in the interim period in which they occur. In addition, the effect of changes in enacted tax laws or rates, tax status, judgment on the realizability of a beginning-of-the-year deferred tax asset in future years or unrecognized tax benefits is recognized in the interim period in which the change occurs. The computation of the annual expected effective income tax rate at each interim period requires certain estimates and assumptions including, but not limited to, the expected pre-tax income (or loss) for the year, projections of the proportion of income (and/or loss) earned and taxed in foreign jurisdictions, permanent and temporary differences, and the likelihood of the realization of deferred tax assets generated in the current year. The accounting estimates used to compute the provision or benefit for income taxes may change as new events occur, more experience is acquired, additional information is obtained or our tax environment changes. To the extent that the expected annual effective income tax rate changes during a quarter, the effect of the change on prior quarters is included in income tax provision in the quarter in which the change occurs. For the three months ended June 30, 2018, the Company recorded an income tax provision of $31.4 million, which represents an effective income tax rate of 10%. The effective tax rate is lower than the statutory rate of 21% due primarily to excess tax benefits generated by the exercise and vesting of stock-based awards. For the six months ended June 30, 2018, the Company recorded an income tax provision of $2.4 million, which represents an effective income tax rate of 1%. The effective tax rate is lower than the statutory rate of 21% due primarily to excess tax benefits generated by the exercise and vesting of stock-based awards. For the three and six months ended June 30, 2017, the Company recorded an income tax benefit, despite pre-tax income, of $19.4 million and $43.3 million, respectively, due primarily to excess tax benefits generated by the exercise and vesting of stock-based awards. On December 22, 2017, the U.S. enacted the Tax Cuts and Jobs Act (the “Tax Act”). The Tax Act subjected to U.S. taxation certain previously deferred earnings of foreign subsidiaries as of December 31, 2017 (“Transition Tax”) and implemented a number of changes that took effect on January 1, 2018, including but not limited to, a reduction of the U.S. federal corporate tax rate from 35% to 21% and a new minimum tax on global intangible low-taxed income (“GILTI”) earned by foreign subsidiaries. The Company was able to make a reasonable estimate of the Transition Tax and recorded a provisional tax expense in the fourth quarter of 2017. The Company was also able to make a reasonable estimate of the impact of GILTI on the expected annual effective income tax rate and recorded a tax expense for the three and six months ended June 30, 2018. Any adjustment of the Company’s provisional tax expense will be reflected as a change in estimate in its results in the period in which the change in estimate is made in accordance with Staff Accounting Bulletin No. 118, Income Tax Accounting Implications of the Tax Cuts and Jobs Act, which is also included in the FASB issued ASU No. 2018-05, Income Taxes (Topic 740), Amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin No. 118, which was issued and adopted by the Company in March 2018. The Company is continuing to gather additional information to more precisely compute the amount of the Transition Tax and expects to finalize its calculation prior to the filing of its U.S. federal tax return, which is due on October 15, 2018. The additional information includes, but is not limited to, the allocation and sourcing of income and deductions in 2017 for purposes of calculating the utilization of foreign tax credits. In addition, our estimates may also be impacted and adjusted as the law is clarified and additional guidance is issued at the federal and state levels. No adjustment was made in the three and six months ended June 30, 2018 to the Company’s previously recorded provisional tax expense, including for the impact of the issuance of Treasury Notices 2018-26 and 2018-28 as we continue to assess their impact, which we believe is immaterial. The Company recognizes interest and, if applicable, penalties related to unrecognized tax benefits in the income tax provision. Accruals for interest and penalties are not material. The Company is routinely under audit by federal, state, local and foreign authorities in the area of income tax. These audits include questioning the timing and the amount of income and deductions and the allocation of income and deductions among various tax jurisdictions. The Internal Revenue Service is currently auditing the Company’s federal income tax returns for the years ended December 31, 2010 through 2016. The statute of limitations for the years 2010 through 2012 has been extended to June 30, 2019, and the statute of limitations for the years 2013 and 2014 has been extended to March 31, 2019. Various other jurisdictions are open to examination for tax years beginning with 2009. Income taxes payable include unrecognized tax benefits considered sufficient to pay assessments that may result from examination of prior year tax returns. We consider many factors when evaluating and estimating our tax positions and tax benefits, which may require periodic adjustments and which may not accurately anticipate actual outcomes. Although management currently believes changes in unrecognized tax benefits from period to period and differences between amounts paid, if any, upon resolution of issues raised in audits and amounts previously provided will not have a material impact on the liquidity, results of operations, or financial condition of the Company, these matters are subject to inherent uncertainties and management’s view of these matters may change in the future. At June 30, 2018 and December 31, 2017, unrecognized tax benefits, including interest and penalties, are $40.5 million and $39.7 million, respectively. If unrecognized tax benefits at June 30, 2018 are subsequently recognized, $37.6 million, net of related deferred tax assets and interest, would reduce income tax expense. The comparable amount as of December 31, 2017 was $37.2 million. The Company believes that it is reasonably possible that its unrecognized tax benefits could decrease by $12.7 million by June 30, 2019, due to expirations of statutes of limitations; $12.4 million of which would reduce the income tax provision. The Company regularly assesses the realizability of deferred tax assets considering all available evidence including, among other things, the nature, frequency and severity of prior cumulative losses, forecasts of future taxable income, the duration of statutory carryforward periods, available tax planning and historical experience, to the extent these items are applicable. As of June 30, 2018, the Company has a gross deferred tax asset of $125.0 million that the Company expects to fully utilize on a more likely than not basis.

INCOME TAXES

At the end of each interim period, the Company makes its best estimate of the annual expected effective income tax rate and applies that rate to its ordinary year-to-date earnings or loss. The income tax provision or benefit related to significant, unusual, or extraordinary items, if applicable, that will be separately reported or reported net of their related tax effects are individually computed and recognized in the interim period in which they occur. In addition, the effect of changes in enacted tax laws or rates, tax status, judgment on the realizability of a beginning-of-the-year deferred tax asset in future years or unrecognized tax benefits is recognized in the interim period in which the change occurs.

The computation of the annual expected effective income tax rate at each interim period requires certain estimates and assumptions including, but not limited to, the expected pre-tax income (or loss) for the year, projections of the proportion of income (and/or loss) earned and taxed in foreign jurisdictions, permanent and temporary differences, and the likelihood of the realization of deferred tax assets generated in the current year. The accounting estimates used to compute the provision or benefit for income taxes may change as new events occur, more experience is acquired, additional information is obtained or our tax environment changes. To the extent that the expected annual effective income tax rate changes during a quarter, the effect of the change on prior quarters is included in income tax provision in the quarter in which the change occurs.

For the three months ended June 30, 2018, the Company recorded an income tax provision of $31.4 million, which represents an effective income tax rate of 10%. The effective tax rate is lower than the statutory rate of 21% due primarily to excess tax benefits generated by the exercise and vesting of stock-based awards. For the six months ended June 30, 2018, the Company recorded an income tax provision of $2.4 million, which represents an effective income tax rate of 1%. The effective tax rate is lower than the statutory rate of 21% due primarily to excess tax benefits generated by the exercise and vesting of stock-based awards. For the three and six months ended June 30, 2017, the Company recorded an income tax benefit, despite pre-tax income, of $19.4 million and $43.3 million, respectively, due primarily to excess tax benefits generated by the exercise and vesting of stock-based awards.

On December 22, 2017, the U.S. enacted the Tax Cuts and Jobs Act (the “Tax Act”). The Tax Act subjected to U.S. taxation certain previously deferred earnings of foreign subsidiaries as of December 31, 2017 (“Transition Tax”) and implemented a number of changes that took effect on January 1, 2018, including but not limited to, a reduction of the U.S. federal corporate tax rate from 35% to 21% and a new minimum tax on global intangible low-taxed income (“GILTI”) earned by foreign subsidiaries. The Company was able to make a reasonable estimate of the Transition Tax and recorded a provisional tax expense in the fourth quarter of 2017. The Company was also able to make a reasonable estimate of the impact of GILTI on the expected annual effective income tax rate and recorded a tax expense for the three and six months ended June 30, 2018. Any adjustment of the Company’s provisional tax expense will be reflected as a change in estimate in its results in the period in which the change in estimate is made in accordance with Staff Accounting Bulletin No. 118, Income Tax Accounting Implications of the Tax Cuts and Jobs Act, which is also included in the FASB issued ASU No. 2018-05, Income Taxes (Topic 740), Amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin No. 118, which was issued and adopted by the Company in March 2018. The Company is continuing to gather additional information to more precisely compute the amount of the Transition Tax and expects to finalize its calculation prior to the filing of its U.S. federal tax return, which is due on October 15, 2018. The additional information includes, but is not limited to, the allocation and sourcing of income and deductions in 2017 for purposes of calculating the utilization of foreign tax credits. In addition, our estimates may also be impacted and adjusted as the law is clarified and additional guidance is issued at the federal and state levels. No adjustment was made in the three and six months ended June 30, 2018 to the Company’s previously recorded provisional tax expense, including for the impact of the issuance of Treasury Notices 2018-26 and 2018-28 as we continue to assess their impact, which we believe is immaterial.

The Company recognizes interest and, if applicable, penalties related to unrecognized tax benefits in the income tax provision. Accruals for interest and penalties are not material.

The Company is routinely under audit by federal, state, local and foreign authorities in the area of income tax. These audits include questioning the timing and the amount of income and deductions and the allocation of income and deductions among various tax jurisdictions. The Internal Revenue Service is currently auditing the Company’s federal income tax returns for the years ended December 31, 2010 through 2016. The statute of limitations for the years 2010 through 2012 has been extended to June 30, 2019, and the statute of limitations for the years 2013 and 2014 has been extended to March 31, 2019. Various other jurisdictions are open to examination for tax years beginning with 2009. Income taxes payable include unrecognized tax benefits considered sufficient to pay assessments that may result from examination of prior year tax returns. We consider many factors when evaluating and estimating our tax positions and tax benefits, which may require periodic adjustments and which may not accurately anticipate actual outcomes. Although management currently believes changes in unrecognized tax benefits from period to period and differences between amounts paid, if any, upon resolution of issues raised in audits and amounts previously provided will not have a material impact on the liquidity, results of operations, or financial condition of the Company, these matters are subject to inherent uncertainties and management’s view of these matters may change in the future.

At June 30, 2018 and December 31, 2017, unrecognized tax benefits, including interest and penalties, are $40.5 million and $39.7 million, respectively. If unrecognized tax benefits at June 30, 2018 are subsequently recognized, $37.6 million, net of related deferred tax assets and interest, would reduce income tax expense. The comparable amount as of December 31, 2017 was $37.2 million. The Company believes that it is reasonably possible that its unrecognized tax benefits could decrease by $12.7 million by June 30, 2019, due to expirations of statutes of limitations; $12.4 million of which would reduce the income tax provision.

The Company regularly assesses the realizability of deferred tax assets considering all available evidence including, among other things, the nature, frequency and severity of prior cumulative losses, forecasts of future taxable income, the duration of statutory carryforward periods, available tax planning and historical experience, to the extent these items are applicable. As of June 30, 2018, the Company has a gross deferred tax asset of $125.0 million that the Company expects to fully utilize on a more likely than not basis.