Quarterly Results - (unaudited) (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. 31, 2013 Nashville Superspeedway	Sep. 30, 2011 Nashville Superspeedway
Quarterly Results - (unaudited)
Revenues	$ 129,000	$ 21,470,000	$ 24,465,000	$ 116,000	$ 129,000	$ 22,773,000	$ 23,719,000	$ 126,000
Operating (loss) earnings	(7,645,000)	7,300,000	8,679,000	(3,674,000)	(3,781,000)	8,151,000	8,596,000	(3,781,000)	4,660,000	9,185,000	(8,660,000)
Net (loss) earnings	(4,758,000)	4,158,000	4,903,000	(2,279,000)	(2,356,000)	4,532,000	5,018,000	(2,623,000)	1,991,000	4,504,000	(9,185,000)
Net earnings (loss) per common share - basic (in dollars per share)	$ (0.13)	$ 0.11	$ 0.13	$ (0.06)	$ (0.07)	$ 0.12	$ 0.14	$ (0.07)	$ 0.05	$ 0.12	$ (0.25)
Net earnings (loss) per common share - diluted (in dollars per share)	$ (0.13)	$ 0.11	$ 0.13	$ (0.06)	$ (0.07)	$ 0.12	$ 0.14	$ (0.07)	$ 0.05	$ 0.12	$ (0.25)
Quarterly Results
Non-cash pre-tax impairment charge									4,329,000		15,687,000	4,329,000	15,687,000
Non-cash pre-tax impairment charges after income taxes												$ 2,814,000