Income Taxes	9 Months Ended
Sep. 30, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes 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. Also, on December 22, 2017, the SEC staff issued Staff Accounting Bulletin No. 118 (“SAB 118”) to address the application of U.S. GAAP in situations when the taxpayer does not have the necessary information available, prepared, or analyzed (including computations) in reasonable detail to complete all the accounting for certain income tax effects of the Tax Reform Act. In accordance with SAB 118 guidance, at December 31, 2017, the Company 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 nine months ended September 30, 2018, the Company recorded the income tax effects of the Tax Cuts and Jobs Act with regard to its federal income taxes. The Company filed its U.S. federal tax return for 2017 during the third quarter of 2018 and recognized as a one-time discrete item an increase of $0.1 million to its provisional transition tax amount of $0.6 million that was initially recorded at December 31, 2017, which resulted in no effect on the annual effective tax rate. The Company considers the federal tax effects from the deemed repatriation dividend to be complete. The Company still considers any state impacts associated with the repatriation dividend and the remeasurement of its deferred tax assets to be provisional until all such state income tax returns are filed for 2017, which should be completed during the fourth quarter of 2018. The Company’s federal income tax returns for tax years 2015 and beyond remain subject to examination, with the latest statute of limitations expiring in September 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.

Income Taxes

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. Also, on December 22, 2017, the SEC staff issued Staff Accounting Bulletin No. 118 (“SAB 118”) to address the application of U.S. GAAP in situations when the taxpayer does not have the necessary information available, prepared, or analyzed (including computations) in reasonable detail to complete all the accounting for certain income tax effects of the Tax Reform Act. In accordance with SAB 118 guidance, at December 31, 2017, the Company 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 nine months ended September 30, 2018, the Company recorded the income tax effects of the Tax Cuts and Jobs Act with regard to its federal income taxes. The Company filed its U.S. federal tax return for 2017 during the third quarter of 2018 and recognized as a one-time discrete item an increase of $0.1 million to its provisional transition tax amount of $0.6 million that was initially recorded at December 31, 2017, which resulted in no effect on the annual effective tax rate. The Company considers the federal tax effects from the deemed repatriation dividend to be complete. The Company still considers any state impacts associated with the repatriation dividend and the remeasurement of its deferred tax assets to be provisional until all such state income tax returns are filed for 2017, which should be completed during the fourth quarter of 2018.

The Company’s federal income tax returns for tax years 2015 and beyond remain subject to examination, with the latest statute of limitations expiring in September 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.