Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies - Narrative (Details)

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Commitments and Contingencies - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Jul. 27, 2017
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Jul. 27, 2016
Long-term Commitment [Line Items]            
Purchases of property and equipment       $ 62,667 $ 29,484  
Rent expense   $ 1,600 $ 5,100 1,700 4,000  
Intelsat Corporation            
Long-term Commitment [Line Items]            
Other commitment     $ 40,000   $ 40,000  
Emerging Markets Communications LLC            
Long-term Commitment [Line Items]            
Additional consideration           $ 25,000
Common stock issued for acquisition (in shares) 5,080,049          
Line of Credit            
Long-term Commitment [Line Items]            
Letters of credit outstanding   7,100   7,100    
Line of Credit | Letters of Credit            
Long-term Commitment [Line Items]            
Letters of credit outstanding   $ 5,900   $ 5,900