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MINERAL PROPERTIES, PLANT AND EQUIPMENT, NET (Tables) | 9 Months Ended
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Sep. 30, 2025
Property, Plant and Equipment [Abstract] |
Schedule of Mineral Properties, Plant and Equipment, Net | The components of Mineral properties, plant and equipment, net are as follows (in thousands):
| September 30, 2025 |  | December 31, 2024
Plant and equipment (1) | $ | 2,074,930 |  |  | $ | 1,883,193 |
Construction in process |  | 210,997 |  |  |  | 135,594 |
Mineral properties subject to depletion |  | 2,315,871 |  |  |  | 2,114,765 |
Mineral properties not yet subject to depletion |  | 895,409 |  |  |  | 884,029 |
Exploration and evaluation assets |  | 247,164 |  |  |  | 254,146 |
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 |
(1)As of September 30, 2025 and December 31, 2024, plant and equipment includes finance lease right-of-use assets with a carrying amount of $74.3 million and $78.9 million, respectively.

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- Definition Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -SubTopic 10 -Topic 360 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482099/360-10-50-1 + Details
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