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Derivative financial instruments - Schedule of Gains (Losses) Recorded as a Component of Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Accumulated Other Comprehensive Income Cumulative Changes In Net Gain Loss From Cash Flow Hedge [Roll Forward] |  |  |  |
Opening balance, before-tax amount | $ (9,293) | $ 11,651 | $ (29,271) | $ 805
Net gains (losses) reclassified into statement of income on completion of hedged transactions, before-tax amount | (4,202) | 2,696 | (10,123) | 9,241
Changes in fair value of effective portion of outstanding derivatives, net, before tax amount | (61,945) | (24,537) | (47,888) | (7,146)
Gain (loss) on cash flow hedging derivatives, before tax amount | (57,743) | (27,233) | (37,765) | (16,387)
Closing balance, before-tax amount | (67,036) | (15,582) | (67,036) | (15,582)
Opening balance, tax (expense) or benefit | 3,215 | (3,927) | 6,809 | 146
Net gains (losses) reclassified into statement of income on completion of hedged transactions, tax (expense) or benefit | 1,211 | (755) | 2,732 | (2,527)
Changes in fair value of effective portion of outstanding derivatives, net, tax (expense) or benefit | 14,814 | 7,895 | 12,741 | 2,050
Gain (loss) on cash flow hedging derivatives, net, tax (expense) or benefit | 13,603 | 8,650 | 10,009 | 4,577
Closing balance, tax (expense) or benefit | 16,818 | 4,723 | 16,818 | 4,723
Opening balance, net of tax amount | (6,078) | 7,724 | (22,462) | 951
Net gains (losses) reclassified into statement of income on completion of hedged transactions, net of tax amount | (2,991) | 1,941 | (7,391) | 6,714
Changes in fair value of effective portion of outstanding derivatives, net, net of tax amount | (47,131) | (16,642) | (35,147) | (5,096)
Gain (loss) on cash flow hedging derivatives, net, net of tax amount | (44,140) | (18,583) | (27,756) | (11,810)
Closing balance, net of tax amount | $ (50,218) | $ (10,859) | $ (50,218) | $ (10,859)

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- Definition Accumulated pretax change in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges. + References No definition available. + Details
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- Definition Accumulated Other Comprehensive Income Cumulative Changes In Net Gain Loss From Cash Flow Hedge + References No definition available. + Details
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- Definition Tax effect on accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges. Includes an entity's share of an equity investee's Increase or Decrease in deferred hedging gains or losses. + References No definition available. + Details
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- Definition Amount, after tax, of accumulated gain (loss) on derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 11 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-11 + Details
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