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Loans receivable (Details 4) - CAD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Loans Receivable Details [Abstract]    
Allowance for loan losses, Beginning $ 16,020 $ 15,409
Derecognition of allowance associated with loan sale (2,131)  
Provision for loan losses 9,451 19,899
Charge offs (14,454) (19,288)
Allowance for loan losses, Ending $ 8,886 $ 16,020