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Equity-Accounted Joint Ventures - MALT Joint Venture - Additional Information (Details) - USD ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Schedule of Equity Method Investments [Line Items]    
Ownership percentage (in percentage) 100.00%  
MALT Joint Venture    
Schedule of Equity Method Investments [Line Items]    
Ownership percentage (in percentage) 52.00%  
Principal amount outstanding on secured loan facilities and finance leases $ 147.0  
Carrying value of guarantee liability $ 0.3 $ 0.4