Equity Investment RailAmerica Condensed Consolidated Statement of Operations (Details) (USD $)	3 Months Ended								12 Months Ended			3 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 28, 2012 RailAmerica [Member]
Operating revenues	$ 391,674,000	$ 401,388,000	$ 400,741,000	$ 375,208,000	$ 227,316,000	$ 222,745,000	$ 217,419,000	$ 207,436,000	$ 1,569,011,000	$ 874,916,000	$ 829,096,000	$ 151,065,000
Operating expenses									1,188,823,000	684,594,000	637,317,000	124,928,000
Income from operations	94,830,000	101,741,000	107,417,000	76,200,000	33,660,000	52,875,000	62,473,000	41,314,000	380,188,000	190,322,000	191,779,000	26,137,000
Interest expense									(67,894,000)	(62,845,000)	(38,617,000)	(90,000)
Other income												9,000
Income before income taxes												26,056,000
Provision for income taxes									46,296,000	46,402,000	38,531,000	10,250,000
Net income									271,296,000	52,433,000	119,484,000	15,806,000
Less: Net income attributable to noncontrolling interest									795,000	0	0	0
Net income available to RailAmerica, Inc.	$ 58,088,000	$ 66,225,000	$ 65,050,000	$ 82,728,000	$ 13,396,000	$ (19,567,000)	$ 36,363,000	$ 22,241,000	$ 272,091,000	$ 52,433,000	$ 119,484,000	$ 15,806,000