Segments (Narrative) (Details)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Segment Reporting Information [Line Items]
Number of customer accounted for consolidated revenues	3	5	3
Telesat [Member]
Segment Reporting Information [Line Items]
Percentage revenue of affiliate eliminated	100.00%	100.00%	100.00%
Percentage of ownership interest	64.00%
Customer One [Member]
Segment Reporting Information [Line Items]
Percentage of customers accounted for consolidated revenues	13.00%	19.00%	22.00%
Customer Two [Member]
Segment Reporting Information [Line Items]
Percentage of customers accounted for consolidated revenues	12.00%	13.00%	16.00%
Customer Three [Member]
Segment Reporting Information [Line Items]
Percentage of customers accounted for consolidated revenues	10.00%	12.00%	10.00%
Customer Four [Member]
Segment Reporting Information [Line Items]
Percentage of customers accounted for consolidated revenues		12.00%
Customer Five [Member]
Segment Reporting Information [Line Items]
Percentage of customers accounted for consolidated revenues		11.00%