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REVENUE - Narrative (Details) oz in Millions, lb in Millions, $ in Millions | 12 Months Ended
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Dec. 31, 2023 USD ($) lb oz $ / Ounce $ / pound | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
Concentrate Metal Sales Agreement |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Embedded derivative, increase (decrease) of value | $ | $ 11.5 | $ 2.8 | $ (1.0)
Silver | Concentrate Metal Sales Agreement |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Notional ounce/tonnes | oz | 5.7 |  |
Average price per ounce/tonnes (in dollars per share) | $ / Ounce | 23.81 |  |
Lead | Concentrate Metal Sales Agreement |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Notional ounce/tonnes | lb | 25.0 |  |
Average price per ounce/tonnes (in dollars per share) | $ / pound | 0.96 |  |
Zinc | Concentrate Metal Sales Agreement |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Notional ounce/tonnes | lb | 3.0 |  |
Average price per ounce/tonnes (in dollars per share) | $ / pound | 1.14 |  |
Customer Concentration Risk | Revenue Benchmark | Central Bank of Türkiye | Gold Dore |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Concentration risk (as a percent) | 31.00% | 31.00% | 41.00%
Customer Concentration Risk | Revenue Benchmark | CIBC | Gold Dore |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Concentration risk (as a percent) | 33.00% | 28.00% | 30.00%
Customer Concentration Risk | Revenue Benchmark | Bank of Montreal | Gold Dore |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Concentration risk (as a percent) |  | 16.00% |

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