Income Taxes	3 Months Ended
Mar. 31, 2018
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES: The Company's benefit from income taxes for the three months ended March 31, 2018 was $15.9 million, while the provision for income taxes for the three months ended March 31, 2017 was $21.9 million. The benefit from income taxes for the three months ended March 31, 2018 included a $31.6 million benefit from the retroactive extension of the United States Short Line Tax Credit. Excluding the benefit from the retroactive extension, the Company's effective income tax rate for the three months ended March 31, 2018 was 26.2%. The Company's effective income tax rate for the three months ended March 31, 2017 was 44.6%. The Company's effective income tax rate decreased primarily as a result of the Tax Cuts and Jobs Act of 2017 (TCJA), which decreased the United States federal corporate income tax rate from 35% to 21%. In addition, the Company's provision for income taxes for the three months ended March 31, 2017 included the recording of a valuation allowance of €1.6 million (or $1.7 million at the average exchange rate on March 31, 2017) associated with tax losses in the Netherlands primarily driven by losses at the Company's Continental Europe intermodal business, ERS Railways B.V. (ERS). The United States Short Line Tax Credit is an income tax track maintenance credit for Class II and Class III railroads to reduce their federal income tax based on qualified railroad track maintenance expenditures. Qualified expenditures include amounts incurred for maintaining track, including roadbed, bridges and related track structures owned or leased by a Class II or Class III railroad. The credit is equal to 50% of the qualified expenditures, subject to an annual limitation of $3,500 multiplied by the number of miles of railroad track owned or leased by the Class II or Class III railroad as of the end of its tax year. The United States Short Line Tax Credit was initially enacted for a three-year period, 2005 through 2007, and was subsequently extended a series of times with the last extension enacted in February 2018. The February 2018 extension provided a retroactive credit, solely for fiscal year 2017. Legislation is currently pending that seeks to make the United States Short Line Tax Credit permanent for fiscal year 2018 and beyond. On December 22, 2017, the TCJA was enacted into law and the United States Securities and Exchange Commission's staff issued Staff Accounting Bulletin No.118 (SAB 118) to address the application of the TCJA on accounting for income taxes in the period which includes the enactment date. Specifically, when the initial accounting for items under the TCJA is incomplete, SAB 118 allows the Company to include provisional amounts when reasonable estimates can be made. SAB 118 provides for an up to one-year measurement period during which the tax effect of the TCJA can be recomputed based on additional guidance and analysis. Any adjustment will be recorded as a tax expense or benefit in the reporting period during which the amounts are determined. As of March 31, 2018, the Company believed that the provisional calculations for year-end 2017 resulted in a reasonable estimate of the one-time transition (toll) tax and therefore, has not made any measurement period adjustments. The Company will continue to refine its estimates as additional guidance and information is available including deferred taxes related to certain equity compensation arrangements.

INCOME TAXES:

The Company's benefit from income taxes for the three months ended March 31, 2018 was $15.9 million, while the provision for income taxes for the three months ended March 31, 2017 was $21.9 million. The benefit from income taxes for the three months ended March 31, 2018 included a $31.6 million benefit from the retroactive extension of the United States Short Line Tax Credit. Excluding the benefit from the retroactive extension, the Company's effective income tax rate for the three months ended March 31, 2018 was 26.2%. The Company's effective income tax rate for the three months ended March 31, 2017 was 44.6%. The Company's effective income tax rate decreased primarily as a result of the Tax Cuts and Jobs Act of 2017 (TCJA), which decreased the United States federal corporate income tax rate from 35% to 21%. In addition, the Company's provision for income taxes for the three months ended March 31, 2017 included the recording of a valuation allowance of €1.6 million (or $1.7 million at the average exchange rate on March 31, 2017) associated with tax losses in the Netherlands primarily driven by losses at the Company's Continental Europe intermodal business, ERS Railways B.V. (ERS).

The United States Short Line Tax Credit is an income tax track maintenance credit for Class II and Class III railroads to reduce their federal income tax based on qualified railroad track maintenance expenditures. Qualified expenditures include amounts incurred for maintaining track, including roadbed, bridges and related track structures owned or leased by a Class II or Class III railroad. The credit is equal to 50% of the qualified expenditures, subject to an annual limitation of $3,500 multiplied by the number of miles of railroad track owned or leased by the Class II or Class III railroad as of the end of its tax year. The United States Short Line Tax Credit was initially enacted for a three-year period, 2005 through 2007, and was subsequently extended a series of times with the last extension enacted in February 2018. The February 2018 extension provided a retroactive credit, solely for fiscal year 2017. Legislation is currently pending that seeks to make the United States Short Line Tax Credit permanent for fiscal year 2018 and beyond.

On December 22, 2017, the TCJA was enacted into law and the United States Securities and Exchange Commission's staff issued Staff Accounting Bulletin No.118 (SAB 118) to address the application of the TCJA on accounting for income taxes in the period which includes the enactment date. Specifically, when the initial accounting for items under the TCJA is incomplete, SAB 118 allows the Company to include provisional amounts when reasonable estimates can be made. SAB 118 provides for an up to one-year measurement period during which the tax effect of the TCJA can be recomputed based on additional guidance and analysis. Any adjustment will be recorded as a tax expense or benefit in the reporting period during which the amounts are determined. As of March 31, 2018, the Company believed that the provisional calculations for year-end 2017 resulted in a reasonable estimate of the one-time transition (toll) tax and therefore, has not made any measurement period adjustments. The Company will continue to refine its estimates as additional guidance and information is available including deferred taxes related to certain equity compensation arrangements.