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Share-based compensation plans (Equity-settled and cash-settled) (Details) - CAD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Expenses under equity settled plans | $ 8,152 | $ 6,859
Expenses (recoveries) under cash-settled plans | 59,225 | 24,369
Stock Option Plan [member] |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Expenses under equity settled plans | 0 | 45
Performance Share Unit Plan [member] |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Expenses (recoveries) under cash-settled plans | 22,013 | 11,221
Restricted Share Unit Plan [member] |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Expenses under equity settled plans | 3,692 | 3,273
Expenses (recoveries) under cash-settled plans | 19,045 | 9,342
Employee Share Ownership Plan [member] |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Expenses under equity settled plans | 4,460 | 3,541
Deferred Share Unit Plan [member] |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Expenses (recoveries) under cash-settled plans | 15,447 | 2,811
Phantom Stock Option Plan [member] |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Expenses (recoveries) under cash-settled plans | 1,908 | 751
Phantom Restricted Share Unit Plan [Member] |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Expenses (recoveries) under cash-settled plans | $ 812 | $ 244

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- 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 No definition available. + Details
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- Definition The amount of expense arising from cash-settled share-based payment transactions in which the goods or services received did not qualify for recognition as assets. [Refer: Expense from share-based payment transactions] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 112 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_112_c&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The amount of expense arising from equity-settled share-based payment transactions in which the goods or services received did not qualify for recognition as assets. [Refer: Expense from share-based payment transactions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2023-01-01 -Paragraph 51 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2023-en-r&anchor=para_51_a&doctype=Standard -URIDate 2023-03-23 + Details
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