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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