Inventories, net (Details) - USD ($) $ in Thousands |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Inventory Disclosure [Abstract] | ||
| Coal | $ 125,907 | $ 118,504 |
| Raw materials, parts, supplies and other, net | 110,029 | 89,086 |
| Total inventories, net | $ 235,936 | $ 207,590 |
| X | ||||||||||
- Definition Inventory, Raw Materials, Purchased Parts, Supplies and Other, Net of Reserve No definition available.
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| X | ||||||||||
- Definition Carrying amount as of the balance sheet date of coal, which is a combustible rock or minerals which are extracted from the ground and used as fuel. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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