PROPERTY, PLANT AND EQUIPMENT - Depreciation and amortization (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| PROPERTY, PLANT AND EQUIPMENT | |||
| Depreciation of plant and equipment | $ 43,348 | $ 37,283 | $ 30,913 |
| Amortization of right of use assets (finance leases) | 7,840 | 10,414 | 8,547 |
| Amortization and depletion of capitalized mine development costs and mineral rights | 16,967 | 17,918 | 14,792 |
| Total depreciation, depletion, and amortization | $ 68,155 | $ 65,615 | $ 54,252 |
| X | ||||||||||
- Definition The aggregate amount of recurring noncash expense charged against earnings in the period to allocate the cost of assets over their estimated remaining economic lives. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount of depreciation expense for lessor's underlying asset for which right to use has been conveyed to lessee under operating lease. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- References No definition available.
|