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Summary of Movement in Temporary Differences of Deferred Tax Liabilities (Detail) - CAD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Property, Plant and Equipment and Intangibles [member] |  |
Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Line Items] |  |
Beginning Balance | $ 454,613 | $ 629,967
Recognized in net loss | (9,667) | (149,489)
Effect of foreign currency exchange differences | 22,163 | (25,865)
Ending Balance | 467,109 | 454,613
Partnership Deferrals [member] |  |
Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Line Items] |  |
Beginning Balance | (335) | (16,447)
Recognized in net loss | 2,065 | 16,112
Ending Balance | 1,730 | (335)
Other Deferred Income Tax Liabilities [Member] |  |
Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Line Items] |  |
Beginning Balance | 6,709 | 6,159
Recognized in net loss | (1,005) | 545
Effect of foreign currency exchange differences | 18 | 5
Ending Balance | 5,722 | 6,709
Losses [member] |  |
Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Line Items] |  |
Beginning Balance | (368,133) | (418,253)
Recognized in net loss | (30,660) | 24,124
Effect of foreign currency exchange differences | (24,802) | 25,996
Ending Balance | (423,595) | (368,133)
Debt Issue Costs [Member] |  |
Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Line Items] |  |
Beginning Balance | 3,352 | 4,215
Recognized in net loss | 182 | (863)
Ending Balance | 3,534 | 3,352
Long-Term Incentive Plan [member] |  |
Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Line Items] |  |
Beginning Balance | (7,935) | (18,270)
Recognized in net loss | 1,325 | 9,651
Effect of foreign currency exchange differences | (239) | 684
Ending Balance | (6,849) | (7,935)
Other Deferred Income Tax Assets [member] |  |
Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Line Items] |  |
Beginning Balance | (11,182) | (12,753)
Recognized in net loss | (139) | 1,230
Effect of foreign currency exchange differences | (431) | 341
Ending Balance | (11,752) | (11,182)
Net Deferred Income Tax Liability [member] |  |
Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Line Items] |  |
Beginning Balance | 77,089 | 174,618
Recognized in net loss | (37,899) | (98,690)
Effect of foreign currency exchange differences | (3,291) | 1,161
Ending Balance | $ 35,899 | $ 77,089

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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 2017-01-01 -Paragraph 81 -Subparagraph g -Clause ii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2017-03-01&anchor=para_81_g_ii&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The amount of deferred tax liabilities or assets. [Refer: Deferred tax liabilities; Deferred tax assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2017-01-01 -Paragraph 81 -Subparagraph g -Clause i -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2017-03-01&anchor=para_81_g_i&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The increase (decrease) in deferred tax liability (asset) resulting from the net exchange differences arising when the financial statements are translated from the functional currency into a different presentation currency, including the translation of a foreign operation into the presentation currency of the reporting entity. [Refer: Deferred tax liability (asset)] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 12 -IssueDate 2017-01-01 -Paragraph 81 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2017-03-01&anchor=para_81&doctype=Standard -URIDate 2017-03-09 + Details
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