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Additional Comprehensive Income (Loss) Detail - Summary of Pre-development, reclamation and other (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Other Income and Expenses [Abstract] |  |  |  |  |  |
Care and maintenance costs | $ 1,675 | $ 2,780 | $ 6,091 |  | $ 13,569 |
(Gain) loss on sale of assets | 176 | 19 | 4,352 |  | 331 |
Accretion | 4,233 | 4,153 | 12,463 |  | 12,219 |
Royalty settlement | 0 | 0 | 6,750 | [1] | 0 | [1]
Business Combination, Acquisition Related Costs | 976 | 0 | 976 |  | 0 |
Other Operating Income (Expense), Net | 1,523 | 1,747 | 4,769 |  | 3,830 |
Pre-development, reclamation, and other | $ 8,583 | $ 8,699 | $ 35,401 |  | $ 29,949 |
[1] | See Note 16 -- Commitments and Contingencies for additional details on the Kensington royalty settlement

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