Changes in Operations Pinsly (Details) (Pinsly [Member], USD $) In Thousands, unless otherwise specified	0 Months Ended
	Jan. 05, 2015 locomotive carload mile employee	Jan. 05, 2015 carload mile employee
Pinsly [Member]
Cash consideration	$ 41,300
Track miles	137	137
Number of employees	77	77
Number of locomotives purchased	16
Carloads shipped annually	35,000	35,000