VESSELS AND EQUIPMENT, NET (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Cost
As of January 1	$ 3,624,224	$ 3,638,048
Additions	7,156	35,984
Transfer from asset under development	(127,620)
Write-offs	(13,018)	(49,808)
As of December 31	3,490,742	3,624,224
Depreciation, amortization and impairment
As of January 1	(463,675)	(366,669)
Charge for the year	(107,460)	(112,564)
Transfer to asset under development	50,448
Impairment		(34,250)
Write-offs	13,018	49,808
As of December 31	(507,669)	(463,675)
Net book value	2,983,073	3,160,549
License
Depreciation, amortization and impairment
Amortization charge	500	500
Vessels and equipment
Cost
As of January 1	3,429,317	3,447,464
Additions	3,282	6,268
Transfer from asset under development	(127,620)
Write-offs	(6,125)	(24,415)
As of December 31	3,298,854	3,429,317
Depreciation, amortization and impairment
As of January 1	(434,396)	(331,477)
Charge for the year	(87,383)	(93,084)
Transfer to asset under development	50,448
Impairment		(34,250)
Write-offs	6,125	24,415
As of December 31	(465,206)	(434,396)
Net book value	2,833,648	2,994,921
Mooring equipment - FLNG
Cost
As of January 1	45,771	45,771
Additions	0	0
Transfer from asset under development	0
Write-offs	0	0
As of December 31	45,771	45,771
Depreciation, amortization and impairment
As of January 1	(9,106)	(3,392)
Charge for the year	(5,714)	(5,714)
Transfer to asset under development	0
Impairment		0
Write-offs	0	0
As of December 31	(14,820)	(9,106)
Net book value	30,951	36,665
Drydocking expenditure
Cost
As of January 1	140,738	133,316
Additions	3,713	29,557
Transfer from asset under development	0
Write-offs	(6,500)	(22,135)
As of December 31	137,951	140,738
Depreciation, amortization and impairment
As of January 1	(16,434)	(26,039)
Charge for the year	(13,080)	(12,530)
Transfer to asset under development	0
Impairment		0
Write-offs	6,500	22,135
As of December 31	(23,014)	(16,434)
Net book value	114,937	124,304
Office equipment
Cost
As of January 1	8,398	11,497
Additions	161	159
Transfer from asset under development	0
Write-offs	(393)	(3,258)
As of December 31	8,166	8,398
Depreciation, amortization and impairment
As of January 1	(3,739)	(5,761)
Charge for the year	(1,283)	(1,236)
Transfer to asset under development
Impairment		0
Write-offs	393	3,258
As of December 31	(4,629)	(3,739)
Net book value	$ 3,537	$ 4,659

Property, Plant and equipment, Transfers from Asset Under Development

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Cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land or leased assets).

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Amount of decrease in accumulated depreciation, depletion and amortization as a result of reclassifications from property, plant and equipment.

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Amount of decrease in accumulated depreciation, depletion and amortization as a result of sale or disposal of property, plant and equipment.

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The aggregate amount of recurring noncash expense charged against earnings in the period to allocate the cost of assets over their estimated remaining economic lives.

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Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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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 acquisition of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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Amount of divestiture of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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