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Additional Balance Sheet Detail and Supplemental Cash Flow Information (Tables) | 3 Months Ended
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Mar. 31, 2020
Supplemental Cash Flow Information [Abstract] |
Schedule of Accrued Liabilities [Table Text Block] | Accrued liabilities and other consist of the following:
In thousands | March 31, 2020 |  | December 31, 2019
Accrued salaries and wages | $ | 14,567 |  |  | $ | 20,047 |
Silvertip contingent consideration | — |  |  | 25,000 |
Deferred revenue (1) | 9,909 |  |  | 16,672 |
Income and mining taxes | 1,908 |  |  | 11,243 |
Accrued operating costs | 3,395 |  |  | 4,163 |
Taxes other than income and mining | 2,692 |  |  | 3,554 |
Accrued interest payable | 5,266 |  |  | 1,833 |
Operating lease liabilities | 12,198 |  |  | 13,104 |
Accrued liabilities and other | $ | 49,935 |  |  | $ | 95,616 |
Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] | he following table provides a reconciliation of cash, cash equivalents, and restricted cash reported within the statement of financial position that total the same such amounts shown in the statement of cash flows in the three months ended March 31, 2020 and 2019:
In thousands | March 31, 2020 |  | March 31, 2019
Cash and cash equivalents | $ | 52,895 |  |  | $ | 69,033 |
Restricted cash equivalents | 1,163 |  |  | 2,989 |
Total cash, cash equivalents and restricted cash shown in the statement of cash flows | $ | 54,058 |  |  | $ | 72,022 |

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- Definition Tabular disclosure of supplemental cash flow information for the periods presented. + References No definition available. + Details
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