Subsequent Events (Details) - Heart of Georgia Railroad [Member] - Subsequent Event [Member]	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2017 carload	Feb. 07, 2017 mile
Subsequent Event [Line Items]
Business Acquisition, Agreement Date	Feb. 07, 2017
Track Miles Leased | mile			219
Annual carloads transported		10,000
Annual carloads interchanged with G&W		2,000