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Income Taxes - Tax rate reconciliation (Details) - CAD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Reconciliation Of Accounting Profit Multiplied By Applicable Tax Rates [Abstract] |  |
Earnings (loss) before income taxes and non-controlling interest | $ (39,531) | $ 135,018
Combined federal and provincial tax rate | 26.90% | 26.90%
Computed income tax expense (recovery) | $ (10,634) | $ 36,320
Increase Decrease In Taxes Abstract |  |
Difference between Canadian rates and rates applicable to subsidiaries in other countries | 42,028 | 5,558
Change in unrecognized deferred tax assets | (7,766) | 19,646
Share-based compensation plans | 398 | 1,146
Income in equity-accounted investee | (12,155) | (12,074)
Change in legislation | (1,978) | 0
Change in uncertain tax positions | 2,455 | 2,572
Other permanent differences | 1,318 | 7,909
Income tax expense (recovery) | $ 13,666 | $ 61,077

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- Definition The amount representing the difference between the tax expense (income) and the product of the accounting profit multiplied by the applicable tax rate(s) that relates to changes in uncertain tax positions. + References No definition available. + Details
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- Definition The amount representing the difference between the tax expense (income) and the product of the accounting profit multiplied by the applicable tax rate(s) that relates to OtherPermanentDifferences. + References No definition available. + Details
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- Definition The amount representing the difference between the tax expense (income) and the product of the accounting profit multiplied by the applicable tax rate(s) that relates to share based compensation plans. + References No definition available. + Details
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- Definition The amount of profit (loss) for a period before deducting tax expense. [Refer: Profit (loss)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2020-01-01 -Paragraph 81 -Subparagraph c -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2020-en-r&anchor=para_81_c_ii&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2020-01-01 -Paragraph 81 -Subparagraph c -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2020-en-r&anchor=para_81_c_i&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The applicable income tax rate. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2020-01-01 -Paragraph 81 -Subparagraph c -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2020-en-r&anchor=para_81_c_ii&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The amount that represents the difference between the tax expense (income) and the product of the accounting profit multiplied by the applicable tax rate(s) that relates to changes in the tax rate. [Refer: Accounting profit] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2020-01-01 -Paragraph 81 -Subparagraph c -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2020-en-r&anchor=para_81_c_i&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The amount that represents the difference between the tax expense (income) and the product of the accounting profit multiplied by the applicable tax rate(s) that relates to foreign tax rates. [Refer: Accounting profit] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2020-01-01 -Paragraph 81 -Subparagraph c -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2020-en-r&anchor=para_81_c_i&doctype=Standard -URIDate 2020-01-01 + Details
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