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Income Taxes | 6 Months Ended
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Jun. 30, 2018
Income Tax Disclosure [Abstract] |
Income Taxes | Income Taxes The effective tax rate was 15.5% in the six months ended June 30, 2018 compared to 29.2% for the same period in 2017. Generally, effective tax rates for these periods differ from statutory federal income tax rates, due to provisions for state and local income taxes, permanent tax differences, and the foreign-derived intangible income tax deduction during the six months ended June 30, 2018. The decrease in the effective tax rate for the six months ended June 30, 2018 compared to the same period of 2017 was due to the reduction of the federal income tax rate from 35% to 21% as a result of the Tax Cuts and Jobs Act ("Act"), as well as R&D tax credits, discrete tax benefits related to equity compensation, and the foreign-derived intangible income tax deduction. Pursuant to the guidance within SEC Staff Accounting Bulletin No. 118 (“SAB 118”), as the Company has continued to analyze certain aspects of the Act and refine its application to the Company. The Company has continued to recognize provisional effects of the Act for which measurement could be reasonably estimated. The ultimate impact of the Act may differ from these estimates due to its continued analysis or further regulatory guidance that may be issued pursuant to the Act. Under SAB 118, adjustments to the provisional amounts recorded by the Company as of June 30, 2018, that are identified within a subsequent measurement period of up to one year from the enactment date will be included as an adjustment to tax expense from continuing operations in the period the amounts are determined.

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- Definition The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -URI http://asc.fasb.org/topic&trid=2144680 + Details
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