The carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees.

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The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

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Amount of interest capitalized during the period.

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Amount of noncurrent assets classified as other.

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Describes the periods of time over which an entity anticipates to receive utility from its property, plant and equipment (that is, the periods of time over which an entity allocates the initial cost of its property, plant and equipment).

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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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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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Per share amount of earnings, after tax, of an event or transaction that is unusual in nature or infrequent in occurrence, or both.

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Summary of Significant Accounting Policies - Vessels and equipment (Detail) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
	Oct. 01, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Interest Costs Capitalized		$ 300	$ 14,800	$ 36,300
Vessels and equipment
Depreciation, Depletion and Amortization		290,672	276,307	485,829
Asset retirement obligation
Asset retirement obligation		30,900	27,800
Goodwill, intangibles and other non-current assets (notes 6 and 16)		133,466	179,270
Asset retirement obligation
Asset retirement obligation
Goodwill, intangibles and other non-current assets (notes 6 and 16)		$ 8,400	7,500
Liquefied Natural Gas
Vessels and equipment
Property, plant and equipment, useful life		35 years
Oil Tanker
Vessels and equipment
Property, plant and equipment, useful life		25 years
Liquefied Petroleum Gas
Vessels and equipment
Property, plant and equipment, useful life		30 years
Excluding amortization of Drydocking expenditure
Vessels and equipment
Depreciation, Depletion and Amortization		$ 239,900	$ 244,000	$ 397,600
Dry-docking activity
Vessels and equipment
Property, Plant and Equipment, Estimated Useful Lives		two and a half to five years
Maximum \| FPSO
Vessels and equipment
Property, plant and equipment, useful life		25 years
Petrojarl Banff [Member] \| Service Life [Member]
Vessels and equipment
Property, plant and equipment, useful life	11 months
Depreciation		$ 1,700
Unusual or Infrequent Item, or Both, Earnings Per Share Impact, Net		$ 0.02