Property and Equipment and Leases Construction in Process (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 3,993,393	$ 3,840,940
Buildings and leasehold improvements
Property, Plant and Equipment [Line Items]
Total property and equipment	92	93
Bridges/tunnels/culverts
Property, Plant and Equipment [Line Items]
Total property and equipment	937	3,500
Track property
Property, Plant and Equipment [Line Items]
Total property and equipment	21,912	24,252
Locomotives and railcars
Property, Plant and Equipment [Line Items]
Total property and equipment	6,657	39,291
Other equipment
Property, Plant and Equipment [Line Items]
Total property and equipment	797	2,369
Total construction-in-process
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 30,395	$ 69,505