PROPERTY, PLANT AND EQUIPMENT AND CONSTRUCTION-IN-PROCESS - Schedule of Projects Under Exploration and Development, Construction (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Construction in Progress [Roll Forward]
Beginning balance	$ 755,589
Cost write-off	(1,446)	$ (3,930)	$ (3,733)
Ending balance	1,048,174	755,589
Projects under exploration and development
Construction in Progress [Roll Forward]
Beginning balance	193,703	162,476	95,268
Cost incurred during the year	97,234	36,339	70,667
Cost write-off		(1,971)	(3,459)
Transfer of projects under exploration and development to projects under construction	4,067	3,141
Ending balance	286,870	193,703	162,476
Projects under construction
Construction in Progress [Roll Forward]
Beginning balance	561,886	652,491	797,930
Cost incurred during the year	527,355	379,886	488,603
Cost write-off	(1,172)	(1,958)	(993)
Transfer of projects under exploration and development to projects under construction	4,067	3,141
Transfer of completed projects to property, plant and equipment	(330,832)	(471,674)	(633,049)
Ending balance	761,304	561,886	652,491
Up-front Bonus Costs | Projects under exploration and development
Construction in Progress [Roll Forward]
Beginning balance	5,331	5,335	5,335
Cost incurred during the year	0	0	0
Cost write-off		(4)	0
Transfer of projects under exploration and development to projects under construction	0	0
Ending balance	5,331	5,331	5,335
Up-front Bonus Costs | Projects under construction
Construction in Progress [Roll Forward]
Beginning balance	11,031	11,156	11,156
Cost incurred during the year	0	0	0
Cost write-off	0	0	0
Transfer of projects under exploration and development to projects under construction	0	0
Transfer of completed projects to property, plant and equipment	0	(125)	0
Ending balance	11,031	11,031	11,156
Exploration and Development Costs | Projects under exploration and development
Construction in Progress [Roll Forward]
Beginning balance	187,669	156,438	89,230
Cost incurred during the year	97,234	36,339	70,667
Cost write-off		(1,967)	(3,459)
Transfer of projects under exploration and development to projects under construction	4,067	3,141
Ending balance	280,836	187,669	156,438
Interest Capitalized | Projects under exploration and development
Construction in Progress [Roll Forward]
Beginning balance	703	703	703
Cost incurred during the year	0	0	0
Cost write-off		0	0
Transfer of projects under exploration and development to projects under construction	0	0
Ending balance	703	703	703
Interest Capitalized | Projects under construction
Construction in Progress [Roll Forward]
Beginning balance	21,082	22,919	25,645
Cost incurred during the year	27,765	12,212	15,181
Cost write-off	0	0	0
Transfer of projects under exploration and development to projects under construction	0	0
Transfer of completed projects to property, plant and equipment	(10,240)	(14,049)	(17,907)
Ending balance	38,607	21,082	22,919
Drilling and Construction Costs | Projects under construction
Construction in Progress [Roll Forward]
Beginning balance	529,773	618,416	761,129
Cost incurred during the year	499,590	367,674	473,422
Cost write-off	(1,172)	(1,958)	(993)
Transfer of projects under exploration and development to projects under construction	4,067	3,141
Transfer of completed projects to property, plant and equipment	(320,592)	(457,500)	(615,142)
Ending balance	$ 711,666	$ 529,773	$ 618,416