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Related Party Transactions (Schedule of Related Party Transactions) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2012
Related Party Transaction [Line Items]    
Revenues (included in income from discontinued operations) from Telesat satellite construction contracts $ 9,363 $ 55,946
Telesat Holdings Inc [Member]
   
Related Party Transaction [Line Items]    
Revenues (included in income from discontinued operations) from Telesat satellite construction contracts 9,383 56,095
Milestone payments received from Telesat $ 17,626 $ 51,931