INCOME TAXES	9 Months Ended
Sep. 30, 2018
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXES In determining its interim provision for/(benefit from) income taxes, the Company uses an estimated annual effective tax rate, which is based on expected annual profit before tax, statutory tax rates and tax planning opportunities available in the various jurisdictions in which the Company operates. Certain significant or unusual items are separately recognized in the quarter in which they occur and can be a source of variability in the effective tax rates from quarter to quarter. The Company’s worldwide effective tax rate for the three months ended September 30, 2018 and 2017 was 0.6% and 15.7%, respectively, and (5.4)% and 15.2% during the nine months ended September 30, 2018 and 2017, respectively. The interim provision for/(benefit from) income taxes in the three months ended September 30, 2018 was unfavorably impacted by the recognition of $252 of net deferred tax liabilities and the interim provision for/(benefit from) income taxes in the nine months ended September 30, 2018 was favorably impacted by the recognition of $25,088 of net deferred tax assets as a result of the election to disregard as separate entities for U.S. tax purposes certain foreign subsidiaries of the Company. In addition, the Company recorded excess tax benefits upon vesting or exercise of stock-based awards of $6,067 and $2,620 during the three months ended September 30, 2018 and 2017, respectively, and $16,197 and $8,452 during the nine months ended September 30, 2018 and 2017, respectively. Due to the timing of the enactment and the complexity involved in applying the provisions of the Tax Cuts and Jobs Act (“U.S. Tax Act”), the Company made reasonable estimates of the effects and recorded provisional amounts in its financial statements as of December 31, 2017. As the Company collects and prepares necessary data and interprets the U.S. Tax Act and any additional guidance issued by the U.S. Treasury Department, the IRS, and other standard-setting bodies, and further refines the calculations, the Company may make adjustments to the provisional amounts recorded. During the three and nine months ended September 30, 2018, the Company further refined its estimate and recorded net provisional reductions of $7,053 and $4,896, respectively, associated with the provisional charge for the one-time transition tax on accumulated foreign subsidiary earnings not previously subject to U.S. income tax which now totals $59,425. The provisional reductions were primarily driven by a decrease in repatriation taxes as a result of the Company completing its analysis of the earnings of relevant foreign subsidiaries in the third quarter of 2018. Of this amount, $49,117 is classified as Taxes payable, noncurrent as of September 30, 2018. The Company continues to analyze the impact of certain foreign tax credits, continues to assess the application of certain state income tax laws and expects to complete its analysis during the fourth quarter of 2018. Any adjustments during this measurement period will be included in the provision for income taxes in the reporting period when such adjustments are determined. The U.S. Tax Act subjects a U.S. shareholder to tax on global intangible low-taxed income (“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. During the nine months ended September 30, 2018, the Company elected to provide for the tax expense related to GILTI in the year the tax is incurred. This election did not have a material impact on the interim financial statements for the three and nine months ended September 30, 2018.

INCOME TAXES

In determining its interim provision for/(benefit from) income taxes, the Company uses an estimated annual effective tax rate, which is based on expected annual profit before tax, statutory tax rates and tax planning opportunities available in the various jurisdictions in which the Company operates. Certain significant or unusual items are separately recognized in the quarter in which they occur and can be a source of variability in the effective tax rates from quarter to quarter.

The Company’s worldwide effective tax rate for the three months ended September 30, 2018 and 2017 was 0.6% and 15.7%, respectively, and (5.4)% and 15.2% during the nine months ended September 30, 2018 and 2017, respectively.

The interim provision for/(benefit from) income taxes in the three months ended September 30, 2018 was unfavorably impacted by the recognition of $252 of net deferred tax liabilities and the interim provision for/(benefit from) income taxes in the nine months ended September 30, 2018 was favorably impacted by the recognition of $25,088 of net deferred tax assets as a result of the election to disregard as separate entities for U.S. tax purposes certain foreign subsidiaries of the Company. In addition, the Company recorded excess tax benefits upon vesting or exercise of stock-based awards of $6,067 and $2,620 during the three months ended September 30, 2018 and 2017, respectively, and $16,197 and $8,452 during the nine months ended September 30, 2018 and 2017, respectively.

Due to the timing of the enactment and the complexity involved in applying the provisions of the Tax Cuts and Jobs Act (“U.S. Tax Act”), the Company made reasonable estimates of the effects and recorded provisional amounts in its financial statements as of December 31, 2017. As the Company collects and prepares necessary data and interprets the U.S. Tax Act and any additional guidance issued by the U.S. Treasury Department, the IRS, and other standard-setting bodies, and further refines the calculations, the Company may make adjustments to the provisional amounts recorded. During the three and nine months ended September 30, 2018, the Company further refined its estimate and recorded net provisional reductions of $7,053 and $4,896, respectively, associated with the provisional charge for the one-time transition tax on accumulated foreign subsidiary earnings not previously subject to U.S. income tax which now totals $59,425. The provisional reductions were primarily driven by a decrease in repatriation taxes as a result of the Company completing its analysis of the earnings of relevant foreign subsidiaries in the third quarter of 2018. Of this amount, $49,117 is classified as Taxes payable, noncurrent as of September 30, 2018. The Company continues to analyze the impact of certain foreign tax credits, continues to assess the application of certain state income tax laws and expects to complete its analysis during the fourth quarter of 2018. Any adjustments during this measurement period will be included in the provision for income taxes in the reporting period when such adjustments are determined.

The U.S. Tax Act subjects a U.S. shareholder to tax on global intangible low-taxed income (“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. During the nine months ended September 30, 2018, the Company elected to provide for the tax expense related to GILTI in the year the tax is incurred. This election did not have a material impact on the interim financial statements for the three and nine months ended September 30, 2018.