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Components of Accounts Payable and Accrued Liabilities (Detail) - CAD ($)
$ in Thousands
Dec. 31, 2019
Jan. 01, 2019
Dec. 31, 2018
Accounts Payable And Accrued Liabilities1 [Abstract]      
Accounts payable $ 91,468   $ 129,493
Accrued liabilities:      
Payroll 54,334   73,682
Other 53,676   71,314
Accounts payable and accrued liabilities $ 199,478 $ 2,800 $ 274,489