Property and Equipment (Property, Plant, Equipment) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Property and equipment	$ 631,054	$ 540,180
Accumulated depreciation and amortization	(347,302)	(293,918)
Property and equipment, net	283,752	246,262
Program, Service and Test Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	296,680	250,328
Satellite Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	46,871	46,368
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	29,811	29,421
Transmission Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	$ 76,604	58,710
Estimated Useful  Lives	5 years
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	$ 181,088	$ 155,353
Pending Litigation [Member] | Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Estimated Useful  Lives	3 years
Maximum [Member] | Program, Service and Test Equipment [Member]
Property, Plant and Equipment [Line Items]
Estimated Useful  Lives	5 years
Maximum [Member] | Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Estimated Useful  Lives	8 years