CONSOLIDATED STATEMENTS OF EARNINGS AND COMPREHENSIVE INCOME (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Revenues:
Admissions	$ 8,727,000	$ 9,521,000	$ 10,428,000
Event-related	8,450,000	9,190,000	9,889,000
Broadcasting	28,463,000	27,445,000	26,404,000
Other	34,000	24,000	26,000
Total revenues	45,674,000	46,180,000	46,747,000
Expenses:
Operating and marketing	27,171,000	26,648,000	26,688,000
Loss on disposal of long-lived assets	2,403,000
Impairment charges		4,329,000
General and administrative	7,146,000	7,252,000	7,560,000
Depreciation	3,262,000	3,291,000	3,314,000
Total expenses	39,982,000	41,520,000	37,562,000
Operating earnings	5,692,000	4,660,000	9,185,000
Interest expense, net	(467,000)	(959,000)	(1,396,000)
Other income (expense)	26,000	157,000	(48,000)
Benefit for contingent obligation	30,000	91,000	321,000
Earnings before income taxes	5,281,000	3,949,000	8,062,000
Income tax expense	(2,136,000)	(1,925,000)	(3,491,000)
Net earnings	3,145,000	2,024,000	4,571,000
Unrealized gain on available-for-sale securities, net of income taxes	7,000	34,000	27,000
Change in pension net actuarial loss and prior service cost, net of income taxes	(1,761,000)	897,000	(265,000)
Comprehensive income	$ 1,391,000	$ 2,955,000	$ 4,333,000
Net earnings per common share - basic:
Basic (in dollars per share)	$ 0.09	$ 0.05	$ 0.12
Net earnings per common share - diluted:
Diluted (in dollars per share)	$ 0.09	$ 0.05	$ 0.12