Consolidated Statements of Income - USD ($) shares in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Net operating revenue	$ 112,773,000	$ 114,893,000	$ 108,343,000
Operating expenses:
Station operating expense	90,199,000	87,537,000	83,245,000
Corporate general and administrative	10,966,000	14,300,000	10,040,000
Other operating expense (income), net	120,000	(14,000)	7,000
Operating expenses	101,285,000	101,823,000	93,292,000
Operating income	11,488,000	13,070,000	15,051,000
Other (income) expenses:
Interest expense	173,000	130,000	284,000
Interest income	(1,441,000)	(410,000)	(16,000)
Other income	(119,000)	(652,000)	(634,000)
Income before income tax expense	12,875,000	14,002,000	15,417,000
Income tax provision:
Current	2,990,000	3,865,000	4,065,000
Deferred	385,000	935,000	195,000
Income tax provision	3,375,000	4,800,000	4,260,000
Net income	$ 9,500,000	$ 9,202,000	$ 11,157,000
Earnings per share:
Basic (in dollars per share)	$ 1.55	$ 1.52	$ 1.85
Diluted (in dollars per share)	$ 1.55	$ 1.52	$ 1.85
Weighted average common shares	6,045	5,973	5,917
Weighted average common and common equivalent shares	6,045	5,973	5,917
Dividends declared per share (in dollars per share)	$ 3.00	$ 4.86	$ 0.98