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INCOME AND MINING TAXES - Changes in net deferred tax assets and liabilities (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
INCOME AND MINING TAXES    
Net deferred income and mining tax liabilities - beginning of year $ 1,089,520 $ 1,036,061
Income and mining tax impact recognized in net income 168,109 190,098
Income tax impact recognized in other comprehensive income and equity (11,169) (3,542)
Net deferred income and mining tax liabilities - end of year 3,970,301 1,089,520
TMAC Resources Inc.    
INCOME AND MINING TAXES    
Deferred income tax assets (liability) acquired on business combinations   $ (133,097)
Kirkland    
INCOME AND MINING TAXES    
Deferred income tax assets (liability) acquired on business combinations $ 2,723,841