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Investments in associates (Narrative) (Details) $ / shares in Units, $ in Thousands | 1 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2020 CAD ($) share $ / shares | May 31, 2020 | Dec. 31, 2021 CAD ($) share | Dec. 31, 2020 CAD ($)
Disclosure of associates [line items] |  |  |  |
Acquisition price allocated to Investments in associates |  |  | $ 125,354 | $ 119,219
Net gain on ownership dilution |  |  | $ 1,847 | $ 10,381
Osisko Mining [Member] |  |  |  |
Disclosure of associates [line items] |  |  |  |
Additional investments held in associates | $ 14,800 |  |  |
Investment units held | share | 4,054,000 |  |  |
Exercise price of investment warrants | $ / shares | $ 5.25 |  |  |
Acquisition price allocated to Investments in associates | $ 13,600 |  |  |
Acquisition price allocated to warrant | $ 1,200 |  |  |
Proportion of ownership interest in associate | 14.70% | 15.80% | 14.40% | 14.50%
Net gain on ownership dilution |  |  |  | $ 10,400
Shares held in associates | share |  |  | 50,023,569 |
Osisko Mining [Member] | Windfall Lake project [Member] | Bottom of range [Member] |  |  |  |
Disclosure of associates [line items] |  |  |  |
NSR royalty percentage |  |  | 2.00% |
Osisko Mining [Member] | Windfall Lake project [Member] | Top of range [Member] |  |  |  |
Disclosure of associates [line items] |  |  |  |
NSR royalty percentage |  |  | 3.00% |
Osisko Mining [Member] | Other properties held by Osisko Mining [Member] |  |  |  |
Disclosure of associates [line items] |  |  |  |
NSR royalty percentage |  |  | 1.00% |
Osisko Metals [Member] |  |  |  |
Disclosure of associates [line items] |  |  |  |
Proportion of ownership interest in associate |  |  | 15.40% | 17.40%
Shares held in associates |  |  | 31,127,397 |
Osisko Metals [Member] | Pine Point mining camp [Member] |  |  |  |
Disclosure of associates [line items] |  |  |  |
NSR royalty percentage |  |  | 2.00% |
Osisko Metals [Member] | Bathurst mining camp [Member] |  |  |  |
Disclosure of associates [line items] |  |  |  |
NSR royalty percentage |  |  | 1.00% |

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