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Revenue and Expense (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Sep. 28, 2012
Sep. 28, 2012
Sep. 30, 2011
Loral - ordinary course of business [Member]
     
Revenue and expense      
Revenue     $ 1,517
Telesat Canada-ordinary course of business [Member]
     
Revenue and expense      
Expense $ 1,496 $ 1,986 $ 1,278