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Investments in affiliates and joint ventures - Amounts Payable and Receivables from Joint Ventures and Affiliates (Details) - CAD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Schedule of Equity Method Investments [Line Items]    
Accounts receivable $ 83,811 $ 68,787
Other assets 5,808 6,543
Total    
Schedule of Equity Method Investments [Line Items]    
Accounts receivable 65,294 31,050
Other assets 2,444 2,162
Accounts payable and accrued liabilities $ 13,773 $ 286