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OTHER INCOME (EXPENSE) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Other Income and Expenses [Abstract] |  |  |  |
Interest income | $ 6,098 | $ 5,344 | $ 21,015 | $ 9,143
Gain (loss) on investments and on marketable security sales | 8,437 | 5,940 | 19,839 | 11,527
Change in fair value of marketable securities | (555) | (37) | 565 | (3,836)
Gain (loss) on sale of mineral properties, plant, and equipment | (560) | (501) | (1,610) | (1,842)
Other | (2,042) | (1,593) | (3,010) | (8,603)
Total | $ 11,378 | $ 9,153 | $ 36,799 | $ 6,389

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