Quarterly report pursuant to Section 13 or 15(d)

Equity Method Investments - Narrative (Details)

v3.19.1
Equity Method Investments - Narrative (Details) - USD ($)
$ in Millions
Jul. 27, 2016
Mar. 31, 2019
Schedule of Equity Method Investments [Line Items]    
Difference between carrying amount and underlying equity   $ 58.6
Finite lived intangible asset, weighted average useful life 14 years 10 months 24 days  
Wireless Maritime Services    
Schedule of Equity Method Investments [Line Items]    
Ownership percentage 49.00%  
Santander    
Schedule of Equity Method Investments [Line Items]    
Ownership percentage 49.00%