Quarterly report pursuant to Section 13 or 15(d)

Revenue - Disaggregation of Revenue (Details)

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Revenue - Disaggregation of Revenue (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Disaggregation of Revenue [Line Items]        
Revenue $ 165,962 $ 155,742 $ 322,459 $ 308,334
Media & Content        
Disaggregation of Revenue [Line Items]        
Revenue 83,455 74,566 158,369 150,945
Media & Content | Licensing & Services        
Disaggregation of Revenue [Line Items]        
Revenue 83,455 74,566 158,369 150,945
Connectivity        
Disaggregation of Revenue [Line Items]        
Revenue 82,507 81,176 164,090 157,389
Connectivity | Aviation Services        
Disaggregation of Revenue [Line Items]        
Revenue 29,423 29,439 58,749 57,634
Connectivity | Aviation Equipment        
Disaggregation of Revenue [Line Items]        
Revenue 6,712 7,154 14,310 13,718
Connectivity | Maritime & Land Services        
Disaggregation of Revenue [Line Items]        
Revenue 43,550 42,143 85,836 81,211
Connectivity | Maritime & Land Equipment        
Disaggregation of Revenue [Line Items]        
Revenue $ 2,822 $ 2,440 $ 5,195 $ 4,826