Intangible Assets and Goodwill - Intangible Assets Subject to Amortization (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Gross	$ 101,929	$ 101,929
Accumulated Amortization	(90,137)	(88,217)
Net	11,792	13,712
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Gross	15,681	15,681
Accumulated Amortization	(15,190)	(15,064)
Net	$ 491	$ 617
Other Intangible Assets [Member] \| Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	1 year	1 year
Other Intangible Assets [Member] \| Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	15 years	15 years
Network Affiliation Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Gross	$ 86,248	$ 86,248
Accumulated Amortization	(74,947)	(73,153)
Net	$ 11,301	$ 13,095
Estimated useful life	15 years	15 years	15 years
Network Affiliation Agreements [Member] \| Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	12 years
Network Affiliation Agreements [Member] \| Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	20 years

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