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Consolidated Statements of Operations Information - Credit losses (Details) - CAD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Disclosure of financial assets [line items]        
(Reversal of) credit losses on loans and receivables and guarantees, net $ (47) $ 88 $ (3,108)  
Former consolidated entity        
Disclosure of financial assets [line items]        
Credit losses relating to the consideration on sale of subsidiary       $ 3,200
Credit losses on corporate guarantees       $ 3,134