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Fair value of financial instruments - Changes in the Level 3 investments (Details) - CAD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Disclosure of financial assets [line items]    
Balance - Beginning of period $ 968,199  
Balance - End of period 763,880 $ 968,199
Level 3 | Warrants and convertible loan    
Disclosure of financial assets [line items]    
Balance - Beginning of period 18 6,952
Acquisitions   4,438
Warrants exercised   (117)
Acquisition of Tintic   (10,827)
Change in fair value - warrants exercised (14) 49
Change in fair value - expired   (287)
Change in fair value - held at the end of the year   (241)
Foreign exchange   51
Balance - End of period $ 4 $ 18