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 Millions
 3 Months Ended 6 Months Ended
Jul. 27, 2017
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Sep. 30, 2016
Jul. 27, 2016
Long-term Commitment [Line Items]                
Rent expense   $ 1.8 $ 1.3 $ 3.6 $ 2.4      
Line of Credit                
Long-term Commitment [Line Items]                
Letters of credit outstanding   7.0   7.0        
Line of Credit | Letters of Credit                
Long-term Commitment [Line Items]                
Letters of credit outstanding   6.0   6.0        
Earn-out liability                
Long-term Commitment [Line Items]                
Fair value of liability   $ 1.2   $ 1.2   $ 2.0    
Emerging Markets Communications LLC                
Long-term Commitment [Line Items]                
Additional consideration               $ 25.0
Emerging Markets Communications LLC | Subsequent Event                
Long-term Commitment [Line Items]                
Common stock issued for acquisition (in shares) 5,080,049              
Intelsat Corporation                
Long-term Commitment [Line Items]                
Other commitment             $ 40.0