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Income Taxes - Canadian operating tax losses and tax credits expiry dates (Details) - Canada - CAD ($) $ in Thousands | 12 Months Ended |
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Dec. 31, 2024 | Dec. 31, 2023
Disclosure of Canadian Operating Tax Losses And Tax Credits [Line Items] |  |
Tax losses - gross | $ 370,207 | $ 324,965
Tax benefit at tax rate of 26% - 27% | 100,300 | 88,408
Set-off against deferred tax liabilities | (13,805) | (18,489)
Total tax loss assets not recognized | 86,495 | 69,919
Tax credits | 1,127 | 1,126
Total tax credit assets not recognized | $ 1,127 | $ 1,126
Top of Range |  |
Disclosure of Canadian Operating Tax Losses And Tax Credits [Line Items] |  |
Percentage of tax benefit | 27.00% |
Bottom of Range |  |
Disclosure of Canadian Operating Tax Losses And Tax Credits [Line Items] |  |
Percentage of tax benefit | 26.00% |

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- Definition The tax expense (income) divided by the accounting profit. [Refer: Accounting profit] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2024-01-01 -Paragraph 81 -Subparagraph c -Clause ii -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2024-en-r&anchor=para_81_c_ii&doctype=Standard -URIDate 2024-03-27 + Details
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