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Derivative Financial Instruments (Tables) | 12 Months Ended
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Dec. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Derivative instruments, future settlement | At December 31, 2017, the Company had the following provisionally priced sales that settle as follows:
In thousands except average prices and notional ounces | 2018 |  | Thereafter
Provisional silver sales contracts | $ | 383 |  |  | $ | — |
Average silver price | $ | 16.61 |  |  | $ | — |
Notional ounces | 23,065 |  |  | — |
Provisional gold sales contracts | $ | 53,214 |  |  | $ | — |
Average gold price | $ | 1,283 |  |  | $ | — |
Notional ounces | 41,476 |  |  | — |
Fair value of the derivative instruments | The following summarizes the classification of the fair value of the derivative instruments:
| December 31, 2017
In thousands | Prepaid expenses and other |  | Accrued liabilities and other |  | Current portion of royalty obligation |  | Non-current portion of royalty obligation
Provisional silver and gold sales contracts | $ | 251 |  |  | $ | 222 |  |  | $ | — |  |  | $ | — |
| December 31, 2016
In thousands | Prepaid expenses and other |  | Accrued liabilities and other |  | Current portion of royalty obligation |  | Non-current portion of royalty obligation
Provisional silver and gold sales contracts | $ | — |  |  | $ | 762 |  |  | $ | — |  |  | $ | — |
Gain losses on derivative instruments | The following represent mark-to-market gains (losses) on derivative instruments for the years ended December 31, 2017, 2016, and 2015, respectively (in thousands):
|  | Year ended December 31,
Financial statement line | Derivative | 2017 |  | 2016 |  | 2015
Revenue | Provisional silver and gold sales contracts | $ | 631 |  |  | $ | (239 | ) |  | $ | 214 |
Fair value adjustments, net | Palmarejo gold production royalty | — |  |  | (5,866 | ) |  | 3,101 |
Fair value adjustments, net | Silver and gold options | — |  |  | (1,582 | ) |  | 1,283 |
|  | $ | 631 |  |  | $ | (7,687 | ) |  | $ | 4,598 |

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- Definition Tabular disclosure of the location and fair value amounts of derivative instruments (and nonderivative instruments that are designated and qualify as hedging instruments) reported in the statement of financial position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624163-113959 + Details
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- Definition Tabular disclosure of pertinent information about a derivative or group of derivatives on a disaggregated basis, such as for individual instruments, or small groups of similar instruments. May include a combination of the type of instrument, risks being hedged, notional amount, hedge designation, related hedged item, inception date, maturity date, or other relevant item. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=84234895&loc=d3e41641-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624163-113959 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=84234895&loc=d3e41678-113959 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=84234895&loc=d3e41638-113959 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5580258-113959 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5579245-113959 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5579240-113959 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=84234895&loc=d3e41620-113959 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(n)(2)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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