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Additional Balance Sheet Detail and Supplemental Cash Flow Information (Tables) | 6 Months Ended
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Jun. 30, 2019
Supplemental Cash Flow Information [Abstract] |
Schedule of Accrued Liabilities [Table Text Block] | Accrued liabilities and other consist of the following:
In thousands | June 30, 2019 |  | December 31, 2018
Accrued salaries and wages | $ | 14,119 |  |  | $ | 22,229 |
Silvertip contingent consideration | 49,635 |  |  | 25,000 |
Deferred revenue (1) | 26,616 |  |  | 3,164 |
Income and mining taxes | 585 |  |  | 16,474 |
Accrued operating costs | 7,084 |  |  | 10,524 |
Taxes other than income and mining | 3,617 |  |  | 3,639 |
Accrued interest payable | 1,324 |  |  | 1,589 |
Operating lease liabilities | 13,207 |  |  | — |
Accrued liabilities and other | $ | 116,187 |  |  | $ | 82,619 |
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 sum to the total of the same such amounts shown in the statement of cash flows for the three and six months ended June 30, 2019 and 2018:
In thousands | June 30, 2019 |  | June 30, 2018
Cash and cash equivalents | $ | 37,907 |  |  | $ | 123,539 |
Restricted cash equivalents | 1,368 |  |  | 12,487 |
Total cash, cash equivalents and restricted cash shown in the statement of cash flows | $ | 39,275 |  |  | $ | 136,026 |

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