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Supplemental Information - Additional Information (Detail) - CAD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016
Supplemental Information [Line Items] |  |
Operating expense | $ 926,171 | $ 661,715
General and administrative expense | 90,072 | 107,689
Depreciation and Amortization, Gain on Re-Measurement, Loss on Asset Decommissioning, and Impairment of Property, Plant and Equipment [Member] |  |
Supplemental Information [Line Items] |  |
Operating expense | 364,200 | 369,700
General and administrative expense | $ 13,500 | $ 14,400

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- Definition The amount of all operating expenses. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2016-01-13 -Paragraph 85 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2016-03-30&anchor=para_85&doctype=Standard -URIDate 2016-03-31 + Details
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- Definition The amount of expense relating to selling, general and administrative activities of the entity. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2016-01-13 -Paragraph 85 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2016-03-30&anchor=para_85&doctype=Standard -URIDate 2016-03-31 + Details
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- Details
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