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Investments (Tables) | 6 Months Ended
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Jun. 30, 2023
Investment in Marketable Securities [Abstract] |
Investments | From time to time, the Company makes strategic investments in equity securities of silver and gold exploration, development and royalty and streaming companies or receives securities as transaction consideration.
| At June 30, 2023
In thousands | Cost |  | Gross Unrealized Losses |  | Gross Unrealized Gains |  | Estimated Fair Value
Equity Securities |  |  |  |  |  |  |
Avino Silver & Gold Mines Ltd | $ | 13,720 |  |  | $ | (4,483) |  |  | $ | — |  |  | $ | 9,237 |
Other | 2,233 |  |  | (2,230) |  |  | — |  |  | 3 |
Equity securities | $ | 15,953 |  |  | $ | (6,713) |  |  | $ | — |  |  | $ | 9,240 |
| At December 31, 2022
In thousands | Cost |  | Gross Unrealized Losses |  | Gross Unrealized Gains |  | Estimated Fair Value
Equity Securities |  |  |  |  |  |  |
Victoria Gold Corp. | $ | 70,560 |  |  | $ | (38,528) |  |  | $ | — |  |  | $ | 32,032 |
Integra Resources Corp. | 9,455 |  |  | (7,115) |  |  | — |  |  | 2,340 |
Avino Silver & Gold Mines Ltd | 13,720 |  |  | (4,199) |  |  | — |  |  | 9,521 |
Other | 2,233 |  |  | (1,974) |  |  | — |  |  | 259 |
Equity securities | $ | 95,968 |  |  | $ | (51,816) |  |  | $ | — |  |  | $ | 44,152 |

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