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The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

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Amount of income (loss) for proportionate share of equity method investee's income (loss).

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Term of lessor's direct financing lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Excludes Selling, General and Administrative Expense.

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Amount of operating lease expense. Excludes sublease income.

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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.

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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Related Party Transactions - Schedule of Related Party Transactions (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021 USD ($) vessel	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($) vessel	Sep. 30, 2020 USD ($)	Sep. 30, 2021 lease	Sep. 30, 2018
Related Party Transaction [Line Items]
Voyage revenues	$ 146,577	$ 148,935	$ 448,148	$ 437,027
Vessel operating expenses	(30,426)	(30,642)	(93,051)	(85,153)
Time-charter hire expenses	5,665	5,980	17,382	17,270
General and administrative expenses	(12,619)	(6,165)	(26,707)	(20,215)
Equity income (loss)	39,238	24,346	105,694	56,874
Affiliated Entity [Member]
Related Party Transaction [Line Items]
Voyage revenues	9,869	9,704	29,285	27,881
Vessel operating expenses	(451)	(1,877)	(5,609)	(4,610)
Time-charter hire expenses	5,665	5,980	17,382	17,270
General and administrative expenses	(9,382)	(3,998)	(18,374)	(11,583)
Equity income (loss)	$ 609	609	$ 1,808	1,815
LNG Carriers [Member]
Related Party Transaction [Line Items]
Number Of Vessels	9		9		9
LNG Carriers [Member] \| Affiliated Entity [Member] \| Yamal Lng Joint Venture [Member]
Related Party Transaction [Line Items]
Number Of Vessels \| vessel	6		6
Bahrain LNG Joint Venture [Member] \| Affiliated Entity [Member] \| Management Service [Member]
Related Party Transaction [Line Items]
Voyage revenues	$ 2,400	2,400	$ 7,200	6,500
Bahrain LNG Joint Venture [Member] \| Affiliated Entity [Member] \| Cargo and Freight [Member]
Related Party Transaction [Line Items]
Voyage revenues	$ 7,500	$ 7,300	$ 22,100	$ 21,400
Bahrain Spirit [Member]
Related Party Transaction [Line Items]
Lessor, Direct financing lease, Term of contract						21 years