Property and Equipment and Leases Construction in Process (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Construction in-process	$ 32,644	$ 36,903
Buildings and leasehold improvements
Property, Plant and Equipment [Line Items]
Construction in-process	5,398	4,209
Bridges/tunnels/culverts
Property, Plant and Equipment [Line Items]
Construction in-process	0	1,000
Track Property [Member]
Property, Plant and Equipment [Line Items]
Construction in-process	3,835	5,504
Locomotives and railcars
Property, Plant and Equipment [Line Items]
Construction in-process	17,759	18,397
Other equipment
Property, Plant and Equipment [Line Items]
Construction in-process	$ 5,652	$ 7,793