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MINERAL PROPERTIES, PLANT AND EQUIPMENT, NET (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Property, Plant and Equipment [Line Items] |  |
Total mineral properties, plant, and equipment | $ 4,200,094 | $ 4,116,747
Accumulated depreciation, plant and equipment | (529,635) | (423,326)
Accumulated depreciation, mineral properties | (420,695) | (223,682)
Mineral properties, plant, and equipment, net | 3,249,764 | 3,469,739
Finance lease, right-of-use asset, before accumulated amortization | 114,900 | 112,800
Plant and equipment |  |
Property, Plant and Equipment [Line Items] |  |
Total mineral properties, plant, and equipment | 1,762,833 | 1,640,705
Construction in process |  |
Property, Plant and Equipment [Line Items] |  |
Total mineral properties, plant, and equipment | 36,841 | 40,290
Mineral properties subject to depletion |  |
Property, Plant and Equipment [Line Items] |  |
Total mineral properties, plant, and equipment | 1,331,615 | 1,282,208
Mineral properties not yet subject to depletion |  |
Property, Plant and Equipment [Line Items] |  |
Total mineral properties, plant, and equipment | 141,629 | 222,938
Exploration and evaluation assets |  |
Property, Plant and Equipment [Line Items] |  |
Total mineral properties, plant, and equipment | $ 927,176 | $ 930,606

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- 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) -URI http://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977 + Details
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- Definition Amount of accumulated depreciation and amortization from plant, property, and equipment and right-of-use asset from finance lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918686-209980 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123391704&loc=SL77918638-209977 + Details
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