v3.25.4

Mineral Interests and Property, Plant and Equipment, net | 12 Months Ended
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Dec. 31, 2025
Property, Plant and Equipment [Abstract] |
Mineral Interests and Property, Plant and Equipment, net | Note 5—Mineral Interests and Property, Plant and Equipment, net Mineral interests totaled $189.6 million and $147.7 million and the related accumulated depletion totaled $82.4 million and $75.5 million as of December 31, 2025 and December 31, 2024, respectively. Property, plant and equipment are summarized as follows (in thousands):
|  | December 31, 2025 |  |  | December 31, 2024 |
Land |  | $ | 77,406 |  |  | $ | 77,351 |
Land improvements |  |  | 82,422 |  |  |  | 19,939 |
Building and leasehold improvements |  |  | 144,744 |  |  |  | 73,543 |
Asset retirement obligation assets |  |  | 48,734 |  |  |  | 62,301 |
Mine development and infrastructure costs |  |  | 208,538 |  |  |  | 126,266 |
Machinery and equipment |  |  | 1,870,215 |  |  |  | 1,435,650 |
Financing lease right of use asset |  |  | 206,303 |  |  |  | 106,959 |
Construction in progress |  |  | 203,696 |  |  |  | 513,072 |
Total |  |  | 2,842,058 |  |  |  | 2,415,081 |
Less: Accumulated depreciation |  |  | (1,024,694 | ) |  |  | (865,611 | )
Property, plant and equipment, net |  | $ | 1,817,364 |  |  | $ | 1,549,470 |
Depreciation and depletion expense was $188.6 million, $154.0 million, and $127.4 million, for the years ended December 31, 2025, December 31, 2024, and December 31, 2023, respectively. Capitalized interest was $12.2 million, $12.7 million, and $12.1 million as of December 31, 2025, December 31, 2024, and December 31, 2023, respectively.

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