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Royalty, stream and other interests - Disclosure of detailed information about royalty interests (Details) - CAD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Royalty, Stream And Other Interests [Line Items]    
Beginning balance $ 1,154,801 $ 1,116,128
Acquisitions 124,209 90,936
Conversion of an offtake into a stream   0
Depletion (51,355) (48,361)
Impairment (1,818) (2,288)
Currency conversion adjustments 30,363 (1,614)
Recognition of royalty and stream interests following the deconsolidation of Osisko Development 122,053  
Ending balance 1,378,253 1,154,801
Royalty interests [Member]    
Royalty, Stream And Other Interests [Line Items]    
Beginning balance 703,113 656,661
Acquisitions 123,359 77,702
Conversion of an offtake into a stream   0
Depletion (27,362) (28,958)
Impairment (1,818) (2,288)
Currency conversion adjustments 8,282 (4)
Recognition of royalty and stream interests following the deconsolidation of Osisko Development 73,501  
Ending balance 879,075 703,113
Stream interests [Member]    
Royalty, Stream And Other Interests [Line Items]    
Beginning balance 438,032 440,941
Acquisitions 850 13,234
Conversion of an offtake into a stream   4,682
Depletion (23,993) (19,403)
Impairment 0 0
Currency conversion adjustments 21,149 (1,422)
Recognition of royalty and stream interests following the deconsolidation of Osisko Development 48,552  
Ending balance 484,590 438,032
Offtake interests [Member]    
Royalty, Stream And Other Interests [Line Items]    
Beginning balance 13,656 18,526
Acquisitions 0 0
Conversion of an offtake into a stream   (4,682)
Depletion 0 0
Impairment 0 0
Currency conversion adjustments 932 (188)
Recognition of royalty and stream interests following the deconsolidation of Osisko Development 0  
Ending balance 14,588 13,656
Producing [Member]    
Royalty, Stream And Other Interests [Line Items]    
Beginning balance 538,521  
Cost 1,200,406 1,145,279
Accumulated depletion and impairment (662,572) (606,758)
Ending balance 537,834 538,521
Producing [Member] | Royalty interests [Member]    
Royalty, Stream And Other Interests [Line Items]    
Beginning balance 230,471  
Cost 634,058 626,345
Accumulated depletion and impairment (423,634) (395,874)
Ending balance 210,424 230,471
Producing [Member] | Stream interests [Member]    
Royalty, Stream And Other Interests [Line Items]    
Beginning balance 308,050  
Cost 566,348 518,934
Accumulated depletion and impairment (238,938) (210,884)
Ending balance 327,410 308,050
Producing [Member] | Offtake interests [Member]    
Royalty, Stream And Other Interests [Line Items]    
Beginning balance 0  
Cost 0 0
Accumulated depletion and impairment 0 0
Ending balance 0 0
Development [Member]    
Royalty, Stream And Other Interests [Line Items]    
Beginning balance 360,544  
Cost 612,845 438,767
Accumulated depletion and impairment (84,234) (78,223)
Ending balance 528,611 360,544
Development [Member] | Royalty interests [Member]    
Royalty, Stream And Other Interests [Line Items]    
Beginning balance 225,866  
Cost 367,845 226,438
Accumulated depletion and impairment (753) (572)
Ending balance 367,092 225,866
Development [Member] | Stream interests [Member]    
Royalty, Stream And Other Interests [Line Items]    
Beginning balance 129,982  
Cost 211,755 181,209
Accumulated depletion and impairment (55,252) (51,227)
Ending balance 156,503 129,982
Development [Member] | Offtake interests [Member]    
Royalty, Stream And Other Interests [Line Items]    
Beginning balance 4,696  
Cost 33,245 31,120
Accumulated depletion and impairment (28,229) (26,424)
Ending balance 5,016 4,696
Exploration and evaluation    
Royalty, Stream And Other Interests [Line Items]    
Beginning balance 255,736  
Cost 314,934 256,640
Accumulated depletion (3,126) (904)
Ending balance 311,808 255,736
Exploration and evaluation | Royalty interests [Member]    
Royalty, Stream And Other Interests [Line Items]    
Beginning balance 246,776  
Cost 304,685 247,680
Accumulated depletion (3,126) (904)
Ending balance 301,559 246,776
Exploration and evaluation | Stream interests [Member]    
Royalty, Stream And Other Interests [Line Items]    
Beginning balance 0  
Cost 677 0
Accumulated depletion 0 0
Ending balance 677 0
Exploration and evaluation | Offtake interests [Member]    
Royalty, Stream And Other Interests [Line Items]    
Beginning balance 8,960  
Cost 9,572 8,960
Accumulated depletion 0 0
Ending balance $ 9,572 $ 8,960