Commitments and Contingencies (Notes)	3 Months Ended
Mar. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies Disclosure [Text Block]	COMMITMENTS AND CONTINGENCIES: From time to time, the Company is a defendant in certain lawsuits and a party to certain arbitrations resulting from the Company's operations in the ordinary course as the nature of the Company's business exposes it to the potential for various claims and litigation, including those related to property damage, personal injury, freight loss, labor and employment, environmental and other matters. The Company maintains insurance policies to mitigate the financial risk associated with such claims. Management believes there are adequate provisions in the financial statements for any probable liabilities that may result from disposition of the pending lawsuits and arbitrations. However, any material changes to pending litigation or a catastrophic rail accident or series of accidents involving material freight loss or property damage, personal injuries or environmental liability or other claims or disputes that are not covered by insurance could have a material adverse effect on the Company's results of operations, financial condition and liquidity. In November 2014, the Company received a notice from the United States Environmental Protection Agency (EPA) requesting information under the Clean Water Act related to the discharge of crude oil as a result of a derailment of an Alabama & Gulf Coast Railway LLC (AGR) freight train in November 2013 in the vicinity of Aliceville, Alabama. In May 2018, the EPA notified the AGR of a maximum civil payment of up to $14.1 million, based on the amount of oil allegedly discharged and other relevant factors considered under the applicable regulation. The Company's evaluation of its defenses, settlement options and insurance coverage is ongoing. Although the cleanup associated with this derailment is substantially complete, the civil penalty associated with the contamination is subject to further discussion and potential litigation.

COMMITMENTS AND CONTINGENCIES:

From time to time, the Company is a defendant in certain lawsuits and a party to certain arbitrations resulting from the Company's operations in the ordinary course as the nature of the Company's business exposes it to the potential for various claims and litigation, including those related to property damage, personal injury, freight loss, labor and employment, environmental and other matters. The Company maintains insurance policies to mitigate the financial risk associated with such claims. Management believes there are adequate provisions in the financial statements for any probable liabilities that may result from disposition of the pending lawsuits and arbitrations. However, any material changes to pending litigation or a catastrophic rail accident or series of accidents involving material freight loss or property damage, personal injuries or environmental liability or other claims or disputes that are not covered by insurance could have a material adverse effect on the Company's results of operations, financial condition and liquidity.

In November 2014, the Company received a notice from the United States Environmental Protection Agency (EPA) requesting information under the Clean Water Act related to the discharge of crude oil as a result of a derailment of an Alabama & Gulf Coast Railway LLC (AGR) freight train in November 2013 in the vicinity of Aliceville, Alabama. In May 2018, the EPA notified the AGR of a maximum civil payment of up to $14.1 million, based on the amount of oil allegedly discharged and other relevant factors considered under the applicable regulation. The Company's evaluation of its defenses, settlement options and insurance coverage is ongoing. Although the cleanup associated with this derailment is substantially complete, the civil penalty associated with the contamination is subject to further discussion and potential litigation.