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Income taxes - Schedule of Non Capital Losses Carry Forwards (Details) $ in Thousands	Dec. 31, 2024 USD ($)
Capital Loss Carryforwards [Line Items]
Total non-capital loss carryforward	$ 2,092,204
Tax credits	215,847
Canada
Capital Loss Carryforwards [Line Items]
Total non-capital loss carryforward	671,945
U.S.
Capital Loss Carryforwards [Line Items]
Total non-capital loss carryforward	1,420,259
2025—2029
Capital Loss Carryforwards [Line Items]
Total non-capital loss carryforward	323
Tax credits	2,349
2025—2029 | Canada
Capital Loss Carryforwards [Line Items]
Total non-capital loss carryforward	323
2025—2029 | U.S.
Capital Loss Carryforwards [Line Items]
Total non-capital loss carryforward	0
2030+
Capital Loss Carryforwards [Line Items]
Total non-capital loss carryforward	2,091,881
Tax credits	213,498
2030+ | Canada
Capital Loss Carryforwards [Line Items]
Total non-capital loss carryforward	671,622
2030+ | U.S.
Capital Loss Carryforwards [Line Items]
Total non-capital loss carryforward	$ 1,420,259

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- Definition

Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-3

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The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-3

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