General (Details)	12 Months Ended
Dec. 31, 2020 ship carrier
Property, Plant and Equipment [Line Items]
Number of carriers in operation \| carrier	10
Delivery, 2021
Property, Plant and Equipment [Line Items]
Number of LNG carriers under construction \| ship	3

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	us-gaap_PropertyPlantAndEquipmentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration