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Additional information on the consolidated statements of loss - Disclosure of detailed information about revenues (Details) - CAD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Additional Information On Consolidated Statements Of Loss Line Items |  |
Royalty, stream and other interest revenue | $ 392,599 | $ 490,472
Royalty interests [Member] |  |
Additional Information On Consolidated Statements Of Loss Line Items |  |
Royalty, stream and other interest revenue | 97,146 | 92,110
Stream interests [Member] |  |
Additional Information On Consolidated Statements Of Loss Line Items |  |
Royalty, stream and other interest revenue | 42,976 | 35,457
Offtake interests [Member] |  |
Additional Information On Consolidated Statements Of Loss Line Items |  |
Royalty, stream and other interest revenue | $ 252,477 | $ 362,905

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