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Equity-Accounted Joint Ventures - Pan Union Joint Venture - Additional Information (Details)
$ in Millions
Dec. 31, 2021
vessel
Dec. 31, 2021
Dec. 31, 2021
lease
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Schedule of Equity Method Investments [Line Items]          
Ownership percentage (in percentage)   100.00%      
LNG Carriers [Member]          
Schedule of Equity Method Investments [Line Items]          
Number of vessels 2   9    
Pan Union Joint Venture          
Schedule of Equity Method Investments [Line Items]          
Number of vessels 4        
Difference between carrying amount and book value | $       $ 9.4 $ 10.0
Pan Union Joint Venture | LNG Carriers [Member] | 30% Ownership          
Schedule of Equity Method Investments [Line Items]          
Ownership percentage (in percentage)   30.00%      
Number of vessels 2        
Pan Union Joint Venture | LNG Carriers [Member] | 20% Ownership          
Schedule of Equity Method Investments [Line Items]          
Ownership percentage (in percentage)   20.00%      
Number of vessels 2