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INCOME AND MINING TAXES - Changes in net deferred tax assets and liabilities (Details) - USD ($) $ in Thousands | 12 Months Ended
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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 |

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