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Disclosure of Liability Classified Plans (Detail) - CAD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Beginning balance	$ 19,817	$ 13,512
Expensed during the period	56,513	4,355
ReclassificationFromEquitySettledPlans	(3,164)	6,833
Payments	(12,411)	(4,883)
Ending balance	60,755	19,817
Current	34,027
Long-term	26,728	11,507
Restricted Share Units (RSUs) [Member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Beginning balance	6,624	7,318
Expensed during the period	17,168	3,119
Payments	(5,742)	(3,813)
Ending balance	18,050	6,624
Current	11,338
Long-term	6,712
Performance Share Units (PSUs) [Member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Beginning balance	4,751	2,858
Expensed during the period	18,634	2,787
Payments	(1,861)	(894)
Ending balance	21,524	4,751
Current	6,182
Long-term	15,342
Deferred Share Units (DSUs) [Member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Beginning balance	1,609	3,336
Expensed during the period	3,065	(1,551)
Payments		(176)
Ending balance	4,674	1,609
Long-term	4,674
Executive Performance Share Units [Member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Beginning balance	6,833
Expensed during the period	17,646
ReclassificationFromEquitySettledPlans	(3,164)	6,833
Payments	(4,808)
Ending balance	16,507	$ 6,833
Current	$ 16,507

X

- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

+ References

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- Definition

The amount of expense from share-based payment transactions with employees. [Refer: Expense from share-based payment transactions]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2021-01-01
-Paragraph 112
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_112_c&doctype=Standard
-URIDate 2021-03-24

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- Definition

The amount of liabilities arising from share-based payment transactions. Share-based payment transactions are transactions in which the entity: (a) receives goods or services from the supplier of those goods or services (including an employee) in a share-based payment arrangement; or (b) incurs an obligation to settle the transaction with the supplier in a share-based payment arrangement when another group entity receives those goods or services. [Refer: Share-based payment arrangements [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 2
-IssueDate 2021-01-01
-Paragraph 51
-Subparagraph b
-Clause i
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2021-en-r&anchor=para_51_b_i&doctype=Standard
-URIDate 2021-03-24

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Current liabilities from share based payment transactions.

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Non-current liabilities from share based payment transactions.

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Reclassification from equity settled plans.

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