Summary Of Significant Accounting Policies {Details 2) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Revenue recognition
Revenues from barter transactions	$ 246,000	$ 222,000	$ 246,000	$ 222,000
Percentage of gross broadcast rights fees retained by NASCAR	10.00%		10.00%
Percentage of gross broadcast rights fees recorded as revenue	90.00%		90.00%
Percentage of gross broadcast rights fees payable to the event as part of the awards to the competitors	25.00%		25.00%
Expense recognition
Advertising expenses	660,000	572,000	660,000	572,000
Net earnings per common share - basic:
Net earnings	4,903,000	5,018,000	2,624,000	2,395,000
Allocation to nonvested restricted stock awards	79,000	80,000	42,000	38,000
Net earnings available to common stockholders	4,824,000	4,938,000	2,582,000	2,357,000
Weighted-average shares outstanding	36,373,000	36,300,000	36,385,000	36,299,000
Net earnings per common share - basic (in dollars per share)	$ 0.13	$ 0.14	$ 0.07	$ 0.06
Net earnings per common share - diluted:
Net earnings	4,903,000	5,018,000	2,624,000	2,395,000
Allocation to nonvested restricted stock awards	79,000	80,000	42,000	38,000
Net earnings available to common stockholders	4,824,000	4,938,000	2,582,000	2,357,000
Weighted-average shares outstanding	36,373,000	36,300,000	36,385,000	36,299,000
Weighted-average shares and dilutive shares outstanding	36,373,000	36,300,000	36,385,000	36,299,000
Net earnings per common share - diluted (in dollars per share)	$ 0.13	$ 0.14	$ 0.07	$ 0.06
Options outstanding (in shares)	0	0	0	0
Restricted Stock Awards
Accounting for stock-based compensation
Stock-based compensation expense	68,000	78,000	166,000	169,000
Income tax benefit (expense) related to restricted stock awards	$ 27,000	$ 32,000	$ 5,000	$ (63,000)