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Additional Balance Sheet Detail and Supplemental Cash Flow Information (Tables) | 12 Months Ended
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Dec. 31, 2018
Supplemental Cash Flow Information [Abstract] |
Schedule of Accrued Liabilities [Table Text Block] | Accrued liabilities and other consist of the following:
In thousands | December 31, 2018 |  | December 31, 2017
Accrued salaries and wages | $ | 22,229 |  |  | $ | 26,559 |
Income and mining taxes | 16,474 |  |  | 25,788 |
Silvertip contingent consideration | 25,000 |  |  | 24,393 |
Accrued operating costs | 13,688 |  |  | 12,323 |
Taxes other than income and mining | 3,639 |  |  | 4,354 |
Accrued interest payable | 1,589 |  |  | 1,513 |
Accrued liabilities and other | $ | 82,619 |  |  | $ | 94,930 |
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 year ended December 31, 2018 and 2017:
In thousands | December 31, 2018 |  | December 31, 2017 |  | December 31, 2016
Cash and cash equivalents | $ | 115,081 |  |  | $ | 192,032 |  |  | $ | 118,312 |
Restricted cash equivalents | 2,988 |  |  | 11,370 |  |  | 8,289 |
Total cash, cash equivalents and restricted cash shown in the statement of cash flows | $ | 118,069 |  |  | $ | 203,402 |  |  | $ | 126,601 |
The following table presents non-cash financing and investing activities and other cash flow information:
| Year ended December 31,
Non-cash financing and investing activities: | 2018 |  | 2017 |  | 2016
Capital lease obligations | $ | 45,813 |  |  | $ | 34,604 |  |  | $ | 32,243 |
Non-cash extinguishment of senior notes | — |  |  | — |  |  | 10,616 |
Non-cash acquisitions and related deferred taxes | 110,273 |  |  | 131,833 |  |  | — |
Other cash flow information: |  |  |  |  |
Interest paid | $ | 22,916 |  |  | $ | 21,943 |  |  | $ | 41,919 |
Income taxes paid | 50,400 |  |  | 13,000 |  |  | 17,181 |

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