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Income taxes - Summary of Valuation Allowance for Deferred Tax Assets (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
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Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Deferred Tax Assets, Valuation Allowance [Roll Forward] |  |  |  |
Beginning balance | $ 97,396 | $ 28,959 | $ 107,583 | $ 27,470
Charged to income tax recovery | 676 | (1,582) | (791) | (1,731)
Charged (reduction) to OCI | (6,418) | 2,664 | (15,138) | 4,302
Reductions to other accounts | 0 | (211) | 0 | (211)
Ending balance | $ 91,654 | $ 29,830 | $ 91,654 | $ 29,830

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- Definition Deferred Tax Assets, Valuation Allowance + References No definition available. + Details
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- Definition Valuation Allowance Deferred Tax Asset, Charged To Income Tax Expense (Recovery) + References No definition available. + Details
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- Definition Valuation Allowance Deferred Tax Asset, Reduction To Other Comphrensive Income OCI + References No definition available. + Details
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- Definition Valuation Allowance Deferred Tax Asset, Reductions To Other Assets + References No definition available. + Details
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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-2 + Details
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