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MINERAL PROPERTIES, PLANT AND EQUIPMENT, NET (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Total mineral properties, plant, and equipment	$ 4,168,058	$ 4,200,094
Accumulated depreciation, plant and equipment	(553,257)	(529,635)
Accumulated depreciation, mineral properties	(451,070)	(420,695)
Mineral properties, plant, and equipment, net	3,163,731	3,249,764
Finance lease, right-of-use asset, before accumulated amortization	105,700	114,900
Plant and equipment
Property, Plant and Equipment [Line Items]
Total mineral properties, plant, and equipment	1,745,105	1,762,833
Construction in process
Property, Plant and Equipment [Line Items]
Total mineral properties, plant, and equipment	51,832	36,841
Mineral properties subject to depletion
Property, Plant and Equipment [Line Items]
Total mineral properties, plant, and equipment	1,393,722	1,331,615
Mineral properties not yet subject to depletion
Property, Plant and Equipment [Line Items]
Total mineral properties, plant, and equipment	658,637	141,629
Exploration and evaluation assets
Property, Plant and Equipment [Line Items]
Total mineral properties, plant, and equipment	$ 318,762	$ 927,176

X

- Definition

Amount, before accumulated amortization, of right-of-use asset from finance lease.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 1
-Subparagraph (a)
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The accumulated decrease in the carrying value of the mineral properties as a result of mine or mineral production.

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+ References

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-Name Accounting Standards Codification
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-SubTopic 10
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