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Summary of Operating Segments by Geographic Locations (Detail) - CAD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016
Disclosure of geographical areas [Line Items] |  |
Revenue | $ 1,321,224 | $ 1,003,233
Total assets | 3,892,931 | 4,324,214
Canada [member] |  |
Disclosure of geographical areas [Line Items] |  |
Revenue | 578,817 | 418,030
Total assets | 1,631,838 | 1,738,853
United States [Member] |  |
Disclosure of geographical areas [Line Items] |  |
Revenue | 568,573 | 426,546
Total assets | 1,666,368 | 1,861,908
International [Member] |  |
Disclosure of geographical areas [Line Items] |  |
Revenue | 190,401 | 169,286
Total assets | 594,725 | 723,453
Inter- Segment Eliminations [Member] |  |
Disclosure of geographical areas [Line Items] |  |
Revenue | $ (16,567) | $ (10,629)

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