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Segment disclosure - Disclosure of detailed information about geographic net assets (Details) - CAD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Disclosure of operating segments [line items] |  |
Royalty, stream and other interests | $ 1,154,801 | $ 1,116,128
Royalties [Member] |  |
Disclosure of operating segments [line items] |  |
Royalty, stream and other interests | 703,014 | 656,661
Streams [Member] |  |
Disclosure of operating segments [line items] |  |
Royalty, stream and other interests | 438,131 | 440,941
Offtakes [Member] |  |
Disclosure of operating segments [line items] |  |
Royalty, stream and other interests | 13,656 | 18,526
North America [Member] |  |
Disclosure of operating segments [line items] |  |
Royalty, stream and other interests | 780,962 | 755,404
North America [Member] | Royalties [Member] |  |
Disclosure of operating segments [line items] |  |
Royalty, stream and other interests | 595,931 | 576,835
North America [Member] | Streams [Member] |  |
Disclosure of operating segments [line items] |  |
Royalty, stream and other interests | 185,031 | 172,879
North America [Member] | Offtakes [Member] |  |
Disclosure of operating segments [line items] |  |
Royalty, stream and other interests | 0 | 5,690
South America [Member] |  |
Disclosure of operating segments [line items] |  |
Royalty, stream and other interests | 231,446 | 230,053
South America [Member] | Royalties [Member] |  |
Disclosure of operating segments [line items] |  |
Royalty, stream and other interests | 57,673 | 46,374
South America [Member] | Streams [Member] |  |
Disclosure of operating segments [line items] |  |
Royalty, stream and other interests | 173,773 | 183,679
South America [Member] | Offtakes [Member] |  |
Disclosure of operating segments [line items] |  |
Royalty, stream and other interests | 0 | 0
Australia [Member] |  |
Disclosure of operating segments [line items] |  |
Royalty, stream and other interests | 22,702 | 19,524
Australia [Member] | Royalties [Member] |  |
Disclosure of operating segments [line items] |  |
Royalty, stream and other interests | 13,742 | 9,924
Australia [Member] | Streams [Member] |  |
Disclosure of operating segments [line items] |  |
Royalty, stream and other interests | 0 | 1,481
Australia [Member] | Offtakes [Member] |  |
Disclosure of operating segments [line items] |  |
Royalty, stream and other interests | 8,960 | 8,119
Africa [Member] |  |
Disclosure of operating segments [line items] |  |
Royalty, stream and other interests | 20,453 | 8,313
Africa [Member] | Royalties [Member] |  |
Disclosure of operating segments [line items] |  |
Royalty, stream and other interests | 20,453 | 8,313
Africa [Member] | Streams [Member] |  |
Disclosure of operating segments [line items] |  |
Royalty, stream and other interests | 0 | 0
Africa [Member] | Offtakes [Member] |  |
Disclosure of operating segments [line items] |  |
Royalty, stream and other interests | 0 | 0
Asia [Member] |  |
Disclosure of operating segments [line items] |  |
Royalty, stream and other interests | 32,968 | 33,109
Asia [Member] | Royalties [Member] |  |
Disclosure of operating segments [line items] |  |
Royalty, stream and other interests | 0 | 0
Asia [Member] | Streams [Member] |  |
Disclosure of operating segments [line items] |  |
Royalty, stream and other interests | 28,272 | 28,392
Asia [Member] | Offtakes [Member] |  |
Disclosure of operating segments [line items] |  |
Royalty, stream and other interests | 4,696 | 4,717
Europe [Member] |  |
Disclosure of operating segments [line items] |  |
Royalty, stream and other interests | 66,270 | 69,725
Europe [Member] | Royalties [Member] |  |
Disclosure of operating segments [line items] |  |
Royalty, stream and other interests | 15,215 | 15,215
Europe [Member] | Streams [Member] |  |
Disclosure of operating segments [line items] |  |
Royalty, stream and other interests | 51,055 | 54,510
Europe [Member] | Offtakes [Member] |  |
Disclosure of operating segments [line items] |  |
Royalty, stream and other interests | $ 0 | $ 0

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