Acquisitions and Dispositions - Pro Forma Results of Operations for Acquisitions (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Acquisitions and Dispositions
Net operating revenue	$ 123,072	$ 129,228
Station operating expense	92,692	97,314
Corporate general and administrative	11,460	11,359
Other operating expense , net	112	61
Operating income	18,808	20,494
Interest expense	735	946
Interest income	(610)	(631)
Other income	(16)	(23)
Income before income tax expense	18,699	20,202
Income tax expense (benefit) expense	5,420	5,944
Net income	$ 13,279	$ 14,258
Earnings per share:
Basic	$ 2.23	$ 2.40
Diluted	$ 2.23	$ 2.40