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Summary of Movement in Temporary Differences of Deferred Tax Liabilities (Detail) - CAD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016
Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Line Items] |  |
Beginning Balance | $ 174,618 |
Ending Balance | 118,911 | $ 174,618
Property, Plant and Equipment and Intangibles [member] |  |
Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Line Items] |  |
Beginning Balance | 629,967 | 637,106
Recognized in net loss | (149,489) | 5,960
Effect of foreign currency exchange differences | (25,865) | (13,099)
Ending Balance | 454,613 | 629,967
Partnership Deferrals [member] |  |
Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Line Items] |  |
Beginning Balance | (16,447) | 12,604
Recognized in net loss | 16,112 | (29,051)
Ending Balance | (335) | (16,447)
Other Deferred Income Tax Liabilities [Member] |  |
Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Line Items] |  |
Beginning Balance | 6,159 | 4,668
Recognized in net loss | 545 | 1,483
Effect of foreign currency exchange differences | 5 | 8
Ending Balance | 6,709 | 6,159
Losses [member] |  |
Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Line Items] |  |
Beginning Balance | (418,253) | (335,966)
Recognized in net loss | 24,124 | (88,119)
Recognized in other comprehensive loss |  | (2,933)
Effect of foreign currency exchange differences | 25,996 | 8,765
Ending Balance | (368,133) | (418,253)
Debt Issue Costs [Member] |  |
Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Line Items] |  |
Beginning Balance | 4,215 | 5,802
Recognized in net loss | (863) | (1,587)
Ending Balance | 3,352 | 4,215
Long-Term Incentive Plan [member] |  |
Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Line Items] |  |
Beginning Balance | (18,270) | (12,477)
Recognized in net loss | 9,651 | (5,979)
Effect of foreign currency exchange differences | 684 | 186
Ending Balance | (7,935) | (18,270)
Other Deferred Income Tax Assets [member] |  |
Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Line Items] |  |
Beginning Balance | (12,753) | (8,271)
Recognized in net loss | 1,230 | (4,543)
Effect of foreign currency exchange differences | 341 | 61
Ending Balance | (11,182) | (12,753)
Net Deferred Income Tax Liability [member] |  |
Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Line Items] |  |
Beginning Balance | 174,618 | 303,466
Recognized in net loss | (98,690) | (121,836)
Recognized in other comprehensive loss |  | (2,933)
Effect of foreign currency exchange differences | 1,161 | (4,079)
Ending Balance | $ 77,089 | $ 174,618

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- Definition The amount of tax expense or income relating to changes in deferred tax liabilities and deferred tax assets, recognised in profit or loss. [Refer: Deferred tax assets; Deferred tax expense (income); Deferred tax liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2016-01-13 -Paragraph 81 -Subparagraph g -Clause ii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2016-03-30&anchor=para_81_g_ii&doctype=Standard -URIDate 2016-03-31 + Details
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