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Canadian ATG Spectrum License - Summary of Amortization Expense (Detail) (License Agreement [Member], USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2014
License Agreement [Member]
 
Schedule Of Estimated Future Amortization Expense [Line Items]  
2014 (period from April 1 to December 31) $ 88
2015 118
2016 118
2017 118
2018 118
Thereafter $ 2,186