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Additional Balance Sheet Detail and Supplemental Cash Flow Information (Tables) | 9 Months Ended
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Sep. 30, 2023
Supplemental Cash Flow Information [Abstract] |
Schedule of Accrued Liabilities [Table Text Block] | Accrued liabilities and other consist of the following:
In thousands | September 30, 2023 |  | December 31, 2022
Accrued salaries and wages | $ | 28,499 |  |  | $ | 29,868 |
Flow-through share premium received (including over-allotment) | 7,847 |  |  | — |
Deferred revenue (1) | 44,843 |  |  | 25,736 |
Income and mining taxes | 8,329 |  |  | 7,874 |
Accrued operating costs | 9,362 |  |  | 6,241 |
Unrealized losses on derivatives | 53 |  |  | 10 |
Taxes other than income and mining | 2,703 |  |  | 3,318 |
Accrued interest payable | 4,021 |  |  | 8,256 |
Operating lease liabilities | 10,905 |  |  | 11,560 |
Accrued liabilities and other | $ | 116,562 |  |  | $ | 92,863 |
Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] | The following table provides a reconciliation of cash, cash equivalents, and restricted cash reported within the Condensed Consolidated Balance Sheets that total the same such amounts shown in the Condensed Consolidated Statements of Cash Flows in the three and nine months ended September 30, 2023 and 2022:
In thousands | September 30, 2023 |  | September 30, 2022
Cash and cash equivalents | $ | 53,223 |  |  | $ | 75,389 |
Restricted cash equivalents | 1,723 |  |  | 1,427 |
Total cash, cash equivalents and restricted cash shown in the Condensed Consolidated Statements of Cash Flows | $ | 54,946 |  |  | $ | 76,816 |

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