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OTHER INCOME (EXPENSE) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Other Income and Expenses [Abstract] |  |  |  |
Interest income | $ 2,234 | $ 495 | $ 3,799 | $ 965
Gain (loss) on marketable securities | (2,876) | (1,362) | (3,799) | (1,947)
Gain (loss) on sale of mineral properties, plant, and equipment | (757) | 1,636 | (1,341) | 1,614
Other | (996) | (951) | (1,421) | (2,425)
Total | $ (2,395) | $ (182) | $ (2,762) | $ (1,793)

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- Definition Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 + Details
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