Quarterly Results of Operations (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Effect of Fourth Quarter Events [Line Items]
Net operating revenue	$ 36,371	$ 34,373	$ 33,831	$ 29,423	$ 33,760	$ 32,929	$ 33,832	$ 28,957	$ 133,998	$ 129,478	$ 130,259
Station operating expenses	25,612	26,366	23,499	22,947	23,798	23,598	23,493	22,088	98,424	92,977	90,288
Corporate G&A	2,321	2,307	2,120	2,153	2,191	2,051	1,982	1,948	8,901	8,172	7,960
Other operating (income) expense	(1,210)	0	0	0	0	0	0	0
Impairment of intangible assets	1,936	0	0	0	2,033	0	0	0	1,936	2,033	0
Operating income from continuing operations	7,712	5,700	8,212	4,323	5,738	7,280	8,357	4,921	25,947	26,296	32,011
Other (income) expenses:
Interest expense	252	268	272	272	282	308	357	358	1,064	1,305	1,733
Other	(33)	7	(30)	(15)	2	(144)	66	25	71	106	(279)
Income from continuing operations before tax	7,493	5,425	7,970	4,066	5,454	7,116	7,934	4,538	24,954	25,042	29,999
Income tax provision	3,050	2,180	3,193	1,627	2,230	2,820	3,130	1,812	10,050	9,992	11,939
Income from continuing operations, net of tax	4,443	3,245	4,777	2,439	3,224	4,296	4,804	2,726	14,904	15,050	18,060
Income (loss) from discontinued operations, net of tax	0	0	0	0	0	0	0	223	0	223	(135)
Net income	$ 4,443	$ 3,245	$ 4,777	$ 2,439	$ 3,224	$ 4,296	$ 4,804	$ 2,949	$ 14,904	$ 15,273	$ 17,925
Basic earnings (loss) per share:
From continuing operations	$ 0.77	$ 0.56	$ 0.83	$ 0.43	$ 0.56	$ 0.76	$ 0.85	$ 0.48	$ 2.57	$ 2.62	$ 3.19
From discontinued operations	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0.04	$ 0	$ 0.04	$ (0.02)
Earnings per share	$ 0.77	$ 0.56	$ 0.83	$ 0.43	$ 0.56	$ 0.76	$ 0.85	$ 0.52	$ 2.57	$ 2.66	$ 3.17
Weighted average common shares	5,709	5,699	5,699	5,690	5,686	5,686	5,683	5,673	5,700	5,681	5,659
Diluted earnings (loss) per share:
From continuing operations	$ 0.76	$ 0.56	$ 0.82	$ 0.42	$ 0.56	$ 0.75	$ 0.84	$ 0.47	$ 2.55	$ 2.60	$ 3.18
From discontinued operations	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0.04	$ 0	$ 0.04	$ (0.02)
Diluted earnings per share	$ 0.76	$ 0.56	$ 0.82	$ 0.42	$ 0.56	$ 0.75	$ 0.84	$ 0.51	$ 2.55	$ 2.64	$ 3.16
Weighted average common and common equivalent shares	5,757	5,742	5,754	5,757	5,751	5,754	5,745	5,738	5,753	5,745	5,672