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Derivative Financial Instruments (Tables) | 12 Months Ended
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Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Derivative instruments, future settlement | At December 31, 2018, the Company had the following derivative instruments that settle as follows:
In thousands except average prices and notional ounces | 2019 |  | Thereafter
Provisional silver sales contracts | $ | 3,559 |  |  | $ | — |
Average silver price per ounce | $ | 14.62 |  |  | $ | — |
Notional ounces | 243,383 |  |  | — |
Provisional gold sales contracts | $ | 31,936 |  |  | $ | — |
Average gold price per ounce | $ | 1,257 |  |  | $ | — |
Notional ounces | 25,411 |  |  | — |
Provisional zinc sales contracts | $ | 6,334 |  |  | $ | — |
Average zinc price per pound | $ | 1.20 |  |  | $ | — |
Notional pounds | 5,270,793 |  |  | — |
Provisional lead sales contracts | $ | 2,360 |  |  | $ | — |
Average lead price per pound | $ | 0.92 |  |  | $ | — |
Notional pound | 2,568,165 |  |  | — |
Zinc put options purchased | $ | 2,700 |  |  | $ | — |
Average zinc strike price per metric ton | $ | 3,000 |  |  | $ | — |
Notional metric tons | 900 |  |  | — |
Zinc call options sold | $ | (3,645 | ) |  | $ | — |
Average zinc strike price per metric ton | $ | 4,050 |  |  | $ | — |
Notional metric tons | 900 |  |  | — |
Fixed interest rate swap payable | $ | 636 |  |  | $ | — |
Fixed Interest rate | 2.46 | % |  | — |
Notional dollars | $ | 50,000 |  |  | $ | — |
Variable interest rate swap receivable | $ | 653 |  |  | $ | — |
Average variable interest rate | 2.50 | % |  | $ | — |
Notional dollars | $ | 50,000 |  |  | $ | — |
Fair value of the derivative instruments | The following summarizes the classification of the fair value of the derivative instruments:
| December 31, 2018
In thousands | Prepaid expenses and other |  | Accrued liabilities and other
Provisional metal sales contracts | $ | 784 |  |  | $ | 644 |
Zinc options | 113 |  |  | — |
Interest rate swaps | 17 |  |  | — |
| $ | 914 |  |  | $ | 644 |
| December 31, 2017
In thousands | Prepaid expenses and other |  | Accrued liabilities and other
Provisional metal sales contracts | $ | 251 |  |  | $ | 222 |
Gain losses on derivative instruments | The following represent mark-to-market gains (losses) on derivative instruments for the years ended December 31, 2018, 2017, and 2016 and 2017, respectively (in thousands):
|  | Year ended December 31,
Financial statement line | Derivative | 2018 |  | 2017 |  | 2016
Revenue | Provisional metal sales contracts | $ | 111 |  |  | $ | 631 |  |  | $ | (239 | )
Fair value adjustments, net | Palmarejo gold production royalty | — |  |  | — |  |  | (5,866 | )
Fair value adjustments, net | Zinc options | 753 |  |  | — |  |  | — |
Fair value adjustments, net | Silver and gold options | — |  |  | — |  |  | (1,582 | )
Fair value adjustments, net | Interest rate swaps | (60 | ) |  | — |  |  | — |
|  | $ | 804 |  |  | $ | 631 |  |  | $ | (7,687 | )

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -URI http://asc.fasb.org/extlink&oid=109980867&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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624163-113959 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5580258-113959 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109980867&loc=d3e41620-113959 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5579245-113959 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=109980867&loc=d3e41638-113959 Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=109980867&loc=d3e41678-113959 Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=109980867&loc=d3e41641-113959 Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959 Reference 9: http://fasb.org/us-gaap/role/ref/legacyRef -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 Reference 10: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5579240-113959 + Details
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