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INCOME AND MINING TAXES - Narrative (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020
Operating Loss Carryforwards [Line Items] |  |
Deferred tax liability not recognized, investments with dividend policy control | $ 10,700,000 | $ 14,100,000
Deferred tax liabilities, investments with dividend policy control | 35,600,000 | $ 47,000,000
Valuation allowance, deferred tax asset, increase, amount | 1,100,000 |
Turkey |  |
Operating Loss Carryforwards [Line Items] |  |
Tax operating losses | $ 0 |

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