Acquisitions and Dispositions (Details 1) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended									12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	[1]	Dec. 31, 2018	Dec. 31, 2017
Business Acquisition [Line Items]
Net operating revenue										$ 129,228	$ 128,180
Station operating expense										97,314	96,218
Corporate general and administrative										11,359	11,657
Other operating expenses										61	55
Impairment of intangible assets										0	1,449
Operating income										20,494	18,801
Interest expense										946	903
Interest income										(631)	0
Other income										(23)	0
Income from continuing operations before income tax expense	$ 5,965	$ 5,270	$ 5,966	$ 2,189	$ 3,659	$ 5,255	$ 5,647	$ 1,765		20,202	17,898
Income tax (benefit) expense										5,944	(5,276)
Income from continuing operations, net of tax										14,258	23,174
Income from discontinued operations, net of tax										0	32,471
Net income										$ 14,258	$ 55,645
Basic earnings per share:
From continuing operations										$ 2.40	$ 3.93
From discontinued operations										0	5.50
Basic earnings per share										2.40	9.43
Diluted earnings per share:
From continuing operations										2.40	3.93
From discontinued operations										0	5.50
Diluted earnings per share										$ 2.40	$ 9.43

[1] March 31, 2017 quarterly data have been reclassified to conform with current presentation.