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Share capital - Disclosure of objectives, policies and processes for managing capital (Details) - CAD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Disclosure of classes of share capital [line items]      
Long-term debt $ 410,435 $ 400,429 $ 349,042
Total equity 1,780,061 1,841,032 $ 1,493,446
Undrawn revolving credit facility 436,610 336,340  
Total capital $ 2,627,106 $ 2,577,801