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Share capital - Disclosure of objectives, policies and processes for managing capital (Details) - CAD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Disclosure of classes of share capital [line items]      
Long-term debt $ 147,950 $ 410,435 $ 400,429
Total equity 1,737,211 1,780,061 $ 1,841,032
Undrawn revolving credit facility 400,000 436,610  
Total capital $ 2,285,161 $ 2,627,106