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Income taxes - Schedule of Valuation Allowance (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Movement in Valuation Allowance [Roll Forward] |  |  |
Valuation allowance at beginning of period | $ 70,812 | $ 119,961 | $ 152,077
Increase of allowance included in income tax expense | 21,396 | 2,035 | 5,810
Decrease of allowance included in income tax expense | 36,252 | 51,184 | 37,926
Net decrease in valuation allowance | (14,856) | (49,149) | (32,116)
Valuation allowance at end of period | $ 55,956 | $ 70,812 | $ 119,961

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- Definition Amount of valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column B)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-4 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column E)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-4 + Details
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