Income Taxes	3 Months Ended
Mar. 31, 2019
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES: The Company's provision for income taxes for the three months ended March 31, 2019 was $14.3 million, compared with a benefit from income taxes of $15.9 million for the three months ended March 31, 2018. The Company's effective income tax rate for the three months ended March 31, 2019 was 26.9%. The Company's provision for 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 for fiscal year 2017, which was enacted in February 2018. Excluding the benefit from the retroactive extension, the effective income tax rate for the three months ended March 31, 2018 was 26.2%. 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.

INCOME TAXES:

The Company's provision for income taxes for the three months ended March 31, 2019 was $14.3 million, compared with a benefit from income taxes of $15.9 million for the three months ended March 31, 2018. The Company's effective income tax rate for the three months ended March 31, 2019 was 26.9%. The Company's provision for 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 for fiscal year 2017, which was enacted in February 2018. Excluding the benefit from the retroactive extension, the effective income tax rate for the three months ended March 31, 2018 was 26.2%.

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.