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Summary of Operating Segments by Geographic Locations (Detail) - CAD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Disclosure of geographical areas [Line Items] |  |
Revenue | $ 935,753 | $ 1,541,320
Total assets | 2,898,878 | 3,269,840
United States [Member] |  |
Disclosure of geographical areas [Line Items] |  |
Revenue | 444,052 | 871,651
Total assets | 1,339,945 | 1,560,523
Canada [Member] |  |
Disclosure of geographical areas [Line Items] |  |
Revenue | 305,613 | 459,377
Total assets | 1,053,921 | 1,133,591
International [Member] |  |
Disclosure of geographical areas [Line Items] |  |
Revenue | 186,088 | 210,292
Total assets | $ 505,012 | $ 575,726

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