Property and Equipment and Leases Property and Equipment (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 3,993,393,000	$ 3,840,940,000
Less: accumulated depreciation	(552,649,000)	(444,645,000)
Property and equipment, net	3,440,744,000	3,396,295,000
Depreciation expense	119,200,000	66,600,000	59,700,000
Construction-in-process [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	30,395,000	69,505,000
Computer equipment
Property, Plant and Equipment [Line Items]
Total property and equipment	11,307,000	9,235,000
Locomotives and railcars
Property, Plant and Equipment [Line Items]
Total property and equipment	493,977,000	458,404,000
Vehicles and mobile equipment
Property, Plant and Equipment [Line Items]
Total property and equipment	42,127,000	38,226,000
Signals and crossing equipment
Property, Plant and Equipment [Line Items]
Total property and equipment	63,208,000	30,564,000
Track equipment
Property, Plant and Equipment [Line Items]
Total property and equipment	19,205,000	17,853,000
Other equipment
Property, Plant and Equipment [Line Items]
Total property and equipment	28,524,000	22,673,000
Total Equipment
Property, Plant and Equipment [Line Items]
Total property and equipment	658,348,000	576,955,000
Land and land improvements
Property, Plant and Equipment [Line Items]
Total property and equipment	547,539,000	562,432,000
Buildings and leasehold improvements
Property, Plant and Equipment [Line Items]
Total property and equipment	122,919,000	90,149,000
Bridges/tunnels/culverts
Property, Plant and Equipment [Line Items]
Total property and equipment	556,108,000	531,388,000
Track property
Property, Plant and Equipment [Line Items]
Total property and equipment	2,078,084,000	2,010,511,000
Total property
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 3,304,650,000	$ 3,194,480,000