Broadcast Licenses, Goodwill and Other Intangible Assets (Details 3) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 16,429	$ 15,206
Accumulated Amortization	13,682	12,488
Net Amount	2,747	2,718
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	4,660	3,546
Accumulated Amortization	2,634	1,529
Net Amount	2,026	2,017
Non-competition agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	3,861	3,861
Accumulated Amortization	3,861	3,861
Net Amount	0	0
Favorable lease agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	5,965	5,965
Accumulated Amortization	5,504	5,468
Net Amount	461	497
Other intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,943	1,834
Accumulated Amortization	1,683	1,630
Net Amount	$ 260	$ 204