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Intangible assets (Details) - USD ($)
$ in Thousands
2 Months Ended 3 Months Ended 9 Months Ended
Dec. 31, 2018
Sep. 30, 2019
Sep. 30, 2019
Intangible Assets, Net [Abstract]      
Gross Carrying Amount $ 43,191 $ 41,624 $ 41,624
Accumulated Amortization 134 931 931
Net Carrying Amount 43,057 40,693 $ 40,693
Weighted average remaining amortization period for intangible assets     39 years 4 months 17 days
Amortization   254 $ 797
Shannon LNG Leases and Permits [Member]      
Intangible Assets, Net [Abstract]      
Gross Carrying Amount 43,191 41,624 41,624
Accumulated Amortization 134 931 931
Net Carrying Amount $ 43,057 $ 40,693 $ 40,693
Shannon LNG Leases and Permits [Member] | Minimum [Member]      
Intangible Assets, Net [Abstract]      
Useful Life 40 years   40 years
Shannon LNG Leases and Permits [Member] | Maximum [Member]      
Intangible Assets, Net [Abstract]      
Useful Life 91 years   91 years