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COMMITMENTS AND CONTINGENCIES - (Narrative) (Details) - USD ($) $ in Thousands | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Other Commitments [Line Items] |  |
Asset retirement obligation | $ 11,688 | $ 10,922
Mining Properties and Mineral Rights |  |
Other Commitments [Line Items] |  |
Renewal costs | 1,010 |
Canyon Project |  |
Other Commitments [Line Items] |  |
Loss contingency, estimate of possible loss | 17,920 | 17,580
Asset retirement obligation | $ 33,710 | $ 33,380

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