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Long-term debt - Disclosure of detailed information of long-term debt, activity (Details) - CAD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Disclosure of detailed information about borrowings [line items]    
Balance - January 1 $ 410,435 $ 400,429
Increase in revolving credit facility, net of discount 147,833 50,000
Repayment of revolving credit facility (113,120) 0
Repayment of convertible debentures (300,000) (50,000)
Mining equipment financings, net 5,076 3,764
Amortization of transaction costs 2,291 2,204
Amortization of discount on banker's acceptances 117 0
Accretion expense 4,427 4,308
Foreign exchange revaluation impact 32 (270)
Deconsolidation of Osisko Development (9,141) 0
Balance - December 31 $ 147,950 $ 410,435