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MINERAL PROPERTIES, PLANT AND EQUIPMENT, NET - Components of Mineral Properties, Plant and Equipment, Net (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024
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Property, Plant and Equipment [Line Items] |  |
Total mineral properties, plant, and equipment | $ 5,744,371 | $ 5,271,727
Accumulated depreciation, plant and equipment | (898,877) | (804,411)
Accumulated depletion, mineral properties | (729,424) | (684,449)
Mineral properties, plant, and equipment, net | 4,116,070 | 3,782,867
Finance lease, right-of-use asset, before accumulated amortization | 74,300 | 78,900
Plant and equipment |  |
Property, Plant and Equipment [Line Items] |  |
Total mineral properties, plant, and equipment | 2,074,930 | 1,883,193
Construction in process |  |
Property, Plant and Equipment [Line Items] |  |
Total mineral properties, plant, and equipment | 210,997 | 135,594
Mineral properties subject to depletion |  |
Property, Plant and Equipment [Line Items] |  |
Total mineral properties, plant, and equipment | 2,315,871 | 2,114,765
Mineral properties not yet subject to depletion |  |
Property, Plant and Equipment [Line Items] |  |
Total mineral properties, plant, and equipment | 895,409 | 884,029
Exploration and evaluation assets |  |
Property, Plant and Equipment [Line Items] |  |
Total mineral properties, plant, and equipment | $ 247,164 | $ 254,146

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- Definition Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization Including Mineral Properties, Accumulated Depletion + References No definition available. + Details
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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 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Subparagraph (a) -SubTopic 20 -Topic 842 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479041/842-20-45-1 + 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 -Topic 360 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482099/360-10-50-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Name Accounting Standards Codification -Section 45 -Paragraph 4 -Subparagraph (a) -SubTopic 20 -Topic 842 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479041/842-20-45-4 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a) -SubTopic 20 -Topic 842 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-4 + Details
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- Definition Amount, before accumulated depreciation and amortization, of property, plant, and equipment and finance lease right-of-use asset. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 360 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482099/360-10-50-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(18)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Subparagraph (a) -SubTopic 20 -Topic 842 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479041/842-20-45-1 + Details
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