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Related Party Transactions (Schedule of Related Party Transactions) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Related Party Transaction [Line Items]    
Revenues (included in income from discontinued operations) from Telesat satellite construction contracts $ 57,571 $ 139,960
Telesat Holdings Inc [Member]
   
Related Party Transaction [Line Items]    
Revenues (included in income from discontinued operations) from Telesat satellite construction contracts 57,745 139,911
Milestone payments received from Telesat $ 54,153 $ 126,579