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Commitments (Narrative) (Details) - 12 months ended Dec. 31, 2021 $ in Millions, $ in Millions | USD ($) Ounce | CAD ($) Ounce
--- | --- | ---
Disclosure Of Commitments [Line Items] |  |
Amount payable for mining equipment and service contracts | $ |  | $ 40.9
Amount payable for mining equipment and service contracts in 2022 | $ |  | 33.3
Amount payable for mining equipment and service contracts in 2023 | $ |  | $ 7.6
Amulsar stream [Member] |  |
Disclosure Of Commitments [Line Items] |  |
Delivery of gold, ounces | 89,034 |
Delivery of silver, ounces | 434,093 |
Credit bid transaction percentage | 35.60% |
Amulsar stream [Member] | 1st Anniversary [Member] |  |
Disclosure Of Commitments [Line Items] |  |
Buy-back option, percentage | 50.00% |
Buy-back option | $ | $ 34.4 |
Amulsar stream [Member] | 2nd and 3rd anniversary [Member] |  |
Disclosure Of Commitments [Line Items] |  |
Buy-back option, percentage | 50.00% |
Buy-back option | $ | $ 31.3 |
Amulsar offtake [Member] |  |
Disclosure Of Commitments [Line Items] |  |
Potential offtake percentage | 84.87% |
Delivery of gold, ounces | 2,110,425 |
Description of offtake percentage increase | Offtake percentage will increase to 84.87% if the operator elects to reduce the gold stream |
Gold per ounces, attributable to OBL (less any ounces delivered pursuant to the Amulsar stream) | 1,853,751 |
Back Forty stream [Member] |  |
Disclosure Of Commitments [Line Items] |  |
Delivery of gold, ounces | 105,000 |
Back Forty stream [Member] | After reaching 105,000 ounces of gold [Member] |  |
Disclosure Of Commitments [Line Items] |  |
Potential stream percentage | 9.25% |
Mantos Blancos stream [Member] |  |
Disclosure Of Commitments [Line Items] |  |
Delivery of silver, ounces | 19,300,000 |
Silver ounces delivered as of December 31, 2021 |  | 2,700,000
Potential stream percentage | 100.00% |
Mantos Blancos stream [Member] | After reaching 19.3 million ounces of silver [Member] |  |
Disclosure Of Commitments [Line Items] |  |
Potential stream percentage | 40.00% |
Gibraltar mine's production [Member] |  |
Disclosure Of Commitments [Line Items] |  |
Delivery of silver, ounces | 5,900,000 |
Gibraltar stream [Member] |  |
Disclosure Of Commitments [Line Items] |  |
Delivery of silver, ounces | 900,000 |
Potential stream percentage | 75.00% |
Gibraltar stream [Member] | After reaching 5.9 million ounces of silver [Member] |  |
Disclosure Of Commitments [Line Items] |  |
Potential stream percentage - Gibco's share | 35.00% |

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