Property and Equipment - Schedule of Construction in Progress (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Property Plant And Equipment [Line Items]
Construction in progress	$ 123,617	$ 101,324
Satellite system
Property Plant And Equipment [Line Items]
Construction in progress	12,912	12,912
Terrestrial repeater network
Property Plant And Equipment [Line Items]
Construction in progress	30,013	25,578
Capitalized software
Property Plant And Equipment [Line Items]
Construction in progress	53,669	37,064
Other
Property Plant And Equipment [Line Items]
Construction in progress	$ 27,023	$ 25,770