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Balance Sheet Classification of Provisions and Other (Detail) - CAD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | --- | ---
Disclosure Of Other Provisions [Abstract] |  |  |
Current | $ 2,796 | $ 3,146 |
Long-term | 10,577 | 10,086 |
Other provisions | $ 13,373 | $ 13,232 | $ 15,461

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