Propert and Equipment (Property, Plant, Equipment) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012 Y	Dec. 31, 2011
Property, Plant and Equipment [Line Items]
Property, Plant And Equipment, Gross	$ 217,974	$ 196,559
Accumulated Depreciation And Amortization	(147,084)	(132,745)
Propert and Equipment, Net	70,890	63,814
Program, service and test equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant And Equipment, Gross	103,169	92,080
Property, Plant and Equipment, Useful Life, Minimum	2
Property, Plant and Equipment, Useful Life, Maximum	5
Satellite Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant And Equipment, Gross	16,580	15,530
Property, Plant and Equipment, Useful Life, Maximum	13
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, Plant And Equipment, Gross	15,386	14,286
Property, Plant and Equipment, Useful Life, Minimum	5
Property, Plant and Equipment, Useful Life, Maximum	8
Transmission Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant And Equipment, Gross	37,518	34,441
Property, Plant and Equipment, Useful Life, Maximum	5
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant And Equipment, Gross	$ 45,321	$ 40,222