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Receivables (Receivable Balances Related to Land Note Receivable and the Telesat Consulting Services Fee) (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Financing Receivable Recorded Investment [Line Items]    
Notes receivable $ 101,000 $ 102,250
Less: current portion (67,333) (34,917)
Long-term receivables 33,667 67,333
Land Note [Member]
   
Financing Receivable Recorded Investment [Line Items]    
Notes receivable 101,000 101,000
Telesat Notes Receivable For Consulting Services [Member]
   
Financing Receivable Recorded Investment [Line Items]    
Notes receivable   $ 1,250