Income Taxes	6 Months Ended
Jun. 30, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Company’s federal income tax returns for tax years 2014 and beyond remain subject to examination, with the latest statute of limitations expiring in October 2021. Certain of the Company's 2013 state income tax returns and a majority of the Company's state income tax returns for 2014 and beyond remain open and subject to examination, with the latest statute of limitations expiring in December 2022, upon filing of the Company's 2017 state tax returns. The Company’s foreign subsidiary's income tax returns for 2014 and beyond remain open to examination by foreign tax authorities. The Tax Cuts and Jobs Act enacted on December 22, 2017 resulted in substantial changes to the U.S. tax code, effective for 2018. These changes included, but were not limited to, (i) reducing the federal corporate income tax rate from 35% to 21% and (ii) requiring companies to pay a one-time transition tax on earnings of certain foreign subsidiaries that were previously tax deferred. The Company applied the guidance in SAB 118, and at December 31, 2017, recorded provisional estimates to re-measure its deferred taxes using the new, 21% statutory rate resulting in a tax benefit of $107.9 million and recorded an estimated transition tax expense of $0.6 million. During the six months ended June 30, 2018, the Company has not recorded any adjustments to the provisional estimates recorded at December 31, 2017. Final accounting for these impacts is expected no later than the fourth quarter of 2018 after the Company files its 2017 federal and state income tax returns.

Income Taxes

The Company’s federal income tax returns for tax years 2014 and beyond remain subject to examination, with the latest statute of limitations expiring in October 2021. Certain of the Company's 2013 state income tax returns and a majority of the Company's state income tax returns for 2014 and beyond remain open and subject to examination, with the latest statute of limitations expiring in December 2022, upon filing of the Company's 2017 state tax returns. The Company’s foreign subsidiary's income tax returns for 2014 and beyond remain open to examination by foreign tax authorities.

The Tax Cuts and Jobs Act enacted on December 22, 2017 resulted in substantial changes to the U.S. tax code, effective for 2018. These changes included, but were not limited to, (i) reducing the federal corporate income tax rate from 35% to 21% and (ii) requiring companies to pay a one-time transition tax on earnings of certain foreign subsidiaries that were previously tax deferred. The Company applied the guidance in SAB 118, and at December 31, 2017, recorded provisional estimates to re-measure its deferred taxes using the new, 21% statutory rate resulting in a tax benefit of $107.9 million and recorded an estimated transition tax expense of $0.6 million.

During the six months ended June 30, 2018, the Company has not recorded any adjustments to the provisional estimates recorded at December 31, 2017. Final accounting for these impacts is expected no later than the fourth quarter of 2018 after the Company files its 2017 federal and state income tax returns.