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COMMITMENTS AND CONTINGENCIES (Narrative) (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | --- | ---
Other Commitments [Line Items] |  |  |
Asset retirement obligation | $ 10,922 | $ 9,595 | $ 13,687
Canyon Project |  |  |
Other Commitments [Line Items] |  |  |
Loss contingency, estimate of possible loss | 17,580 | 21,040 |
Asset retirement obligation | $ 33,380 | $ 42,910 |

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