Property, Plant And Equipment (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Property, Plant And Equipment [Abstract]
Land and land improvements	$ 27,036,000	$ 27,036,000
Buildings	69,182,000	68,899,000
Leasehold improvements	16,696,000	14,007,000
Equipment	182,987,000	159,432,000
Furniture and fixtures	31,412,000	26,368,000
Satellite capacity under construction (see Note 17)		40,495,000
Other construction in progress	25,828,000	20,187,000
Property, plant and equipment, gross	353,141,000	356,425,000
Accumulated depreciation and amortization	(149,419,000)	(120,520,000)
Property, plant and equipment, net	203,722,000	235,905,000
Depreciation and amortization expense	$ 29,500,000	$ 25,800,000	$ 25,200,000