Changes in Operations U.K/Europe ERS Intermodal Business & UK Coal (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Goodwill, Impairment Loss	$ 0	$ 14,482,000	$ 0
Restructuring costs	10,160,000	8,182,000	$ 0
U.K./European Operations [Member]
Goodwill, Impairment Loss		14,482,000
Restructuring costs	9,400,000	6,500,000
ERS Railways [Member]
Goodwill, Impairment Loss		14,500,000
ERS Railways [Member] | U.K./European Operations [Member]
Asset Impairment Charges		21,500,000
Goodwill, Impairment Loss		14,500,000
Restructuring costs	5,700,000
ERS Railways [Member] | U.K./European Operations [Member] | Customer contracts and relationships [Member]
Impairment of Intangible Assets, Finite-lived		4,100,000
U.K Coal [Member] | U.K./European Operations [Member]
Asset Impairment Charges		14,700,000
Charges associated with write off of leased railcars		10,500,000
Restructuring Costs		$ 4,200,000
Restructuring Reserve, Accrual Adjustment	$ (1,100,000)