Property and Equipment and Leases Construction in Process (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Construction in-process	$ 47,044	$ 42,974
Buildings and leasehold improvements (subject to term of lease)
Property, Plant and Equipment [Line Items]
Construction in-process	2,097	1,312
Bridges/tunnels/culverts
Property, Plant and Equipment [Line Items]
Construction in-process	39	4,082
Track property
Property, Plant and Equipment [Line Items]
Construction in-process	24,962	24,078
Locomotives and railcars
Property, Plant and Equipment [Line Items]
Construction in-process	12,875	11,170
Other equipment
Property, Plant and Equipment [Line Items]
Construction in-process	$ 7,071	$ 2,332