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Basis of Presentation and Summary of Material Accounting Policies - Assets held for sale and discontinued operations (Details) - CAD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Assets Classified as Held for Sale      
Gross revenues $ 54,944 $ 63,689 $ 71,291
Net (loss) income for the year 1,399 (23,407) 7,371
Loss before income taxes 10,197 (23,956) 17,547
Impairment loss (1,246) 31,443  
Income tax (expense) recovery 8,798 (549) 10,176
Net (loss) income 1,399 $ (23,407) $ 7,371
Assets and liabilities classified as held for sale      
Assets Classified as Held for Sale      
Assets held for sale as percentage of consolidated total assets   7.00%  
Gross revenues   $ 17,583  
Loss before income taxes   35,760  
Impairment loss $ 31,443 31,443  
Income tax (expense) recovery   8,116  
Net (loss) income   27,644  
Profit (loss) from production assets   3,433  
Profit (loss) from group   $ 804