Propert and Equipment (Property, Plant, Equipment) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Property, Plant And Equipment, Gross	$ 373,096	$ 320,086
Accumulated Depreciation And Amortization	(209,236)	(186,242)
Property and equipment, net	163,860	133,844
Program, service and test equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant And Equipment, Gross	199,190	164,734
Satellite Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant And Equipment, Gross	$ 42,367	36,201
Property, Plant and Equipment, Useful Life	13 years
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, Plant And Equipment, Gross	$ 18,846	17,512
Transmission Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant And Equipment, Gross	$ 47,218	47,610
Property, Plant and Equipment, Useful Life	5 years
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant And Equipment, Gross	$ 65,475	$ 54,029
Minimum [Member] | Program, service and test equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	2 years
Minimum [Member] | Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	5 years
Maximum [Member] | Program, service and test equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	5 years
Maximum [Member] | Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	8 years