v3.3.1.900
Quarterly Financial Data (Unaudited) - Explanatory (Details) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended 12 Months Ended
Dec. 31, 2014
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Segment Reporting            
Income Tax Expense (Benefit)       $ 72,201 $ 30,784 $ (37,437)
Variance As Compared To Prior Quarter            
Segment Reporting            
Income Tax Expense (Benefit)   $ (23,200)        
TerreStar Networks Inc. (TerreStar) | Exchangeable Notes | Other, net            
Segment Reporting            
Gain on investments account for at fair value $ 5,800   $ 5,800