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Supplemental Financial Information (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Dec. 31, 2018
Supplemental Cash Flow Elements [Abstract]      
Employee benefits paid in Class A common stock $ 6,654 $ 7,605  
Increase (decrease) in capital expenditures included in accounts payable, net (15,320) 585  
Restricted Cash and Cash Equivalents [Abstract]      
Restricted cash   1,000 $ 1,000
Research and Development Expense [Abstract]      
Research and development expenses 6,888 7,137  
Capitalized Software Costs      
Payments to develop software 7,600 7,148  
Other noncurrent assets, net      
Capitalized Software Costs      
Capitalized computer software, net 99,000   97,000
Capitalized software development costs for software sold to customers 34,000   29,000
Payments to develop software 8,000 7,000  
Capitalized computer software, amortization $ 6,000 6,000  
Weighted Average      
Capitalized Software Costs      
Software useful life 3 years    
Contract Acquisition Costs      
Capitalized Contract Cost [Abstract]      
Contract acquisition costs $ 102,000   104,000
Contract acquisition costs, amortization 21,000 20,000  
Contract Fulfillment Costs      
Capitalized Contract Cost [Abstract]      
Contract acquisition costs 3,000   3,000
Level 2      
Fair value measurements      
In-orbit incentive obligations 105,000   $ 107,000
Cost of Sales      
Research and Development Expense [Abstract]      
Research and development expenses 5,395 6,598  
Research and development      
Research and Development Expense [Abstract]      
Research and development expenses $ 6,888 $ 7,137