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Intangible Assets and Goodwill - Additional Information (Detail) - CAD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Disclosure of information for cash generating unit    
Impairment of goodwill $ 0 $ 0
Impairment of indefinite life intangible assets   $ 0
Intangible assets with indefinite useful life $ 0  
Cash flow projection period five-year