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Segment disclosure - Disclosure of main assets and liabilities per operating segment (Detail) - CAD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Disclosure of operating segments [line items] |  |  |
Cash | $ 115,698 | $ 302,524 | $ 108,223
Current assets | 152,926 | 335,188 |
Investments in associates and other investments | 294,364 | 276,733 |
Royalty, stream and other interests | 1,154,801 | 1,116,128 |
Mining interests and plant and equipment | 635,655 | 489,512 | 343,693
Exploration and evaluation assets | 3,635 | 42,519 | 42,949
Goodwill | 111,204 | 111,204 |
Total assets | 2,370,622 | 2,397,104 |
Total liabilities (excluding long-term debt) | 180,126 | 155,643 |
Long-term debt | 410,435 | 400,429 | $ 349,042
Royalties, streams and similar interests [Member] |  |  |
Disclosure of operating segments [line items] |  |  |
Cash | 82,291 | 105,097 |
Current assets | 91,594 | 117,592 |
Investments in associates and other investments | 231,884 | 166,589 |
Royalty, stream and other interests | 1,247,489 | 1,203,781 |
Mining interests and plant and equipment | 7,991 | 9,011 |
Exploration and evaluation assets | 0 | 0 |
Goodwill | 111,204 | 111,204 |
Total assets | 1,691,958 | 1,609,344 |
Total liabilities (excluding long-term debt) | 89,416 | 67,449 |
Long-term debt | 406,671 | 400,429 |
Mining exploration, evaluation and development [Member] |  |  |
Disclosure of operating segments [line items] |  |  |
Cash | 33,407 | 197,427 |
Current assets | 61,422 | 218,478 |
Investments in associates and other investments | 62,480 | 110,144 |
Royalty, stream and other interests | 0 | 0 |
Mining interests and plant and equipment | 559,332 | 407,000 |
Exploration and evaluation assets | 3,635 | 41,869 |
Goodwill | 0 | 0 |
Total assets | 703,110 | 802,144 |
Total liabilities (excluding long-term debt) | 115,156 | 102,578 |
Long-term debt | 3,764 | 0 |
Intersegment transactions (Member) |  |  |
Disclosure of operating segments [line items] |  |  |
Cash | 0 | 0 |
Current assets | (90) | (882) |
Investments in associates and other investments | 0 | 0 |
Royalty, stream and other interests | (92,688) | (87,653) |
Mining interests and plant and equipment | 68,332 | 73,501 |
Exploration and evaluation assets | 0 | 650 |
Goodwill | 0 | 0 |
Total assets | (24,446) | (14,384) |
Total liabilities (excluding long-term debt) | (24,446) | (14,384) |
Long-term debt | $ 0 | $ 0 |

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