Commitments and Contingencies (Details) (USD $)	12 Months Ended						12 Months Ended		1 Months Ended				3 Months Ended	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 Sports Authority of the County of Wilson (Tennessee)	Dec. 31, 2011 Sports Authority of the County of Wilson (Tennessee)	Dec. 31, 2012 Change in control, severance and noncompete payments and benefits	Dec. 31, 2012 Excise tax under excess parachute payment	Sep. 30, 2011 Minimum Sports Authority of the County of Wilson (Tennessee)	Sep. 30, 1999 Variable Rate Tax Exempt Infrastructure Revenue Bonds, Series 1999 Sports Authority of the County of Wilson (Tennessee)	Dec. 31, 2012 Variable Rate Tax Exempt Infrastructure Revenue Bonds, Series 1999 Sports Authority of the County of Wilson (Tennessee)	Sep. 30, 2011 Variable Rate Tax Exempt Infrastructure Revenue Bonds, Series 1999 Sports Authority of the County of Wilson (Tennessee)	Sep. 30, 2011 Variable Rate Tax Exempt Infrastructure Revenue Bonds, Series 1999 Maximum Sports Authority of the County of Wilson (Tennessee)	Sep. 30, 2011 Nashville Superspeedway	Dec. 31, 2012 Nashville Superspeedway Variable Rate Tax Exempt Infrastructure Revenue Bonds, Series 1999	Dec. 31, 2011 Nashville Superspeedway Variable Rate Tax Exempt Infrastructure Revenue Bonds, Series 1999
Commitments and Contingencies
Rental payments charged to operations	$ 52,000	$ 96,000	$ 116,000
Minimum lease payments
2013	21,000
2014	15,000
2015	11,000
2016	1,000
Commitments and Contingencies
Debt issued									25,900,000
Outstanding amount of debt										19,600,000
Annual principal payments								800,000				1,600,000
Irrevocable direct-pay letter of credit issued											19,929,000
Balance available in the sales and incremental property tax fund				1,758,000	1,534,000
Amount paid into the sales and incremental property tax fund				957,000
Deduction from the sales and incremental property tax fund for principal and interest payments				733,000
Provision for contingent obligation	(321,000)	2,250,000											2,245,000		2,250,000
Decrease in the provision for contingent obligation due to changing interest rates														316,000
Maximum contingent liability, minimum						8,200,000	1,300,000
Maximum contingent liability, maximum						9,900,000	3,000,000
Percentage of monthly amount paid in consideration of non-compete covenants							50.00%
Reserve of contingent obligation														$ 1,934,000