CONSOLIDATED STATEMENTS OF EARNINGS AND COMPREHENSIVE INCOME - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Revenues:
Admissions	$ 3,446,000	$ 3,682,000	$ 3,446,000	$ 3,682,000
Event-related	4,634,000	4,674,000	4,744,000	4,813,000
Broadcasting	17,505,000	16,890,000	17,505,000	16,890,000
Other	2,000	7,000	2,000	7,000
Revenues	25,587,000	25,253,000	25,697,000	25,392,000
Expenses:
Operating and marketing	14,100,000	13,847,000	15,154,000	15,053,000
General and administrative	1,783,000	1,820,000	3,791,000	3,774,000
Costs to remove long-lived assets			286,000
Depreciation	823,000	867,000	1,644,000	1,763,000
Total expenses	16,706,000	16,534,000	20,875,000	20,590,000
Operating earnings	8,881,000	8,719,000	4,822,000	4,802,000
Interest expense, net	(68,000)	(66,000)	(116,000)	(125,000)
Provision for contingent obligation	(11,000)	(70,000)	(52,000)	(56,000)
Other income (expense)	6,000	(8,000)	46,000	(8,000)
Earnings before income taxes	8,808,000	8,575,000	4,700,000	4,613,000
Income tax expense	(3,605,000)	(3,509,000)	(1,902,000)	(1,890,000)
Net earnings	5,203,000	5,066,000	2,798,000	2,723,000
Unrealized gain on available-for-sale securities, net of income taxes	9,000	5,000	6,000	10,000
Change in net actuarial loss and prior service cost, net of income taxes	25,000	18,000	50,000	35,000
Comprehensive income	$ 5,237,000	$ 5,089,000	$ 2,854,000	$ 2,768,000
Net earnings per common share:
Basic (in dollars per share)	$ 0.14	$ 0.14	$ 0.08	$ 0.07
Diluted (in dollars per share)	$ 0.14	$ 0.14	$ 0.08	$ 0.07