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Accounts Receivable (Details) - CAD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Trade And Other Receivables [Abstract]    
Trade receivables $ 166,054 $ 321,638
GST/VAT receivables 38,192 4,614
Other receivables 734 1,792
Total $ 204,980 $ 328,044