Property and Equipment - Schedule of Construction in Progress (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Construction in progress	$ 201,992	$ 144,954
Satellite system
Property, Plant and Equipment [Line Items]
Construction in progress	80,359	43,977
Terrestrial repeater network
Property, Plant and Equipment [Line Items]
Construction in progress	1,649	1,139
Capitalized software
Property, Plant and Equipment [Line Items]
Construction in progress	102,687	82,204
Other
Property, Plant and Equipment [Line Items]
Construction in progress	$ 17,297	$ 17,634