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INCOME AND MINING TAXES - Components of income and mining taxes expense (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
INCOME AND MINING TAXES    
Current income and mining taxes $ 181,812 $ 180,202
Deferred income and mining taxes:    
Origination and reversal of temporary differences 178,588 75,756
Total income and mining taxes expense $ 360,400 $ 255,958