Goodwill and Intangible Assets - Other Amortizable Intangible (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020
Changes in other amortizable intangible assets
Net balance at the beginning of the period			$ 15,901
Amortization	$ (1,600)	$ (1,800)	(5,152)	$ (6,800)
Net balance at the end of the period	10,749		10,749
Future estimated amortization expense
Remainder of 2020					$ 1,616
2021					6,424
2022					1,766
2023					328
2024 and thereafter					615
Total	10,749		$ 10,749		10,749
Weighted Average
Changes in other amortizable intangible assets
Remaining amortization period			2 years 1 month 6 days
Affiliate relationships
Changes in other amortizable intangible assets
Net balance at the beginning of the period			$ 14,352
Amortization			(4,492)
Net balance at the end of the period	9,860		9,860
Future estimated amortization expense
Total	9,860		9,860		9,860
Advertiser relationships
Changes in other amortizable intangible assets
Net balance at the beginning of the period			138
Amortization			(138)
Future estimated amortization expense
Total			138
Non-compete agreement
Changes in other amortizable intangible assets
Net balance at the beginning of the period			826
Amortization			(407)
Net balance at the end of the period	419		419
Future estimated amortization expense
Total	419		419		419
Other intangibles
Changes in other amortizable intangible assets
Net balance at the beginning of the period			68
Amortization			(48)
Net balance at the end of the period	20		20
Future estimated amortization expense
Total	20		20		20
Programming contracts
Changes in other amortizable intangible assets
Net balance at the beginning of the period			517
Amortization			(67)
Net balance at the end of the period	450		450
Future estimated amortization expense
Total	$ 450		$ 450		$ 450