Equity Investment RailAmerica Condensed Consolidated Balance Sheet (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 28, 2012 RailAmerica [Member]
Assets [Abstract]
Current assets	$ 548,330,000	$ 465,252,000		$ 270,560,000
Property and equipment, net	3,440,744,000	3,396,295,000		1,588,612,000
Goodwill	630,462,000	634,953,000	160,277,000	474,115,000
Total intangible assets, net	613,933,000	670,206,000		446,327,000
Other assets, net				116,000
Total assets	5,319,821,000	5,226,115,000		2,779,730,000
Liabilities and equity [Abstract]
Current liabilities	456,508,000	416,744,000		136,717,000
Long-term debt, less current portion				10,410,000
Deferred income tax liabilities, net	863,051,000	862,734,000		551,856,000
Other long-term liabilities	43,748,000	47,506,000		19,618,000
Commitments and contingencies	0	0		0
Total RailAmerica, Inc. stockholders' equity	2,147,795,000	1,494,937,000		2,055,604,000
Noncontrolling interest	1,275,000	5,525,000		5,525,000
Total equity	2,149,070,000	1,500,462,000	960,634,000	2,061,129,000
Total liabilities and equity	$ 5,319,821,000	$ 5,226,115,000		$ 2,779,730,000