Derivative financial instruments and hedging activities - Schedule of Effect of Derivatives on the Condensed Consolidated Financial Statements (Details) - USD ($) $ in Thousands |
3 Months Ended | |
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Apr. 30, 2026 |
Apr. 30, 2025 |
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| Treasury bond forwards | ||
| Derivative Instruments, Gain (Loss) [Line Items] | ||
| Gain (loss) after reclassification, before tax | $ 34,312 | $ 0 |
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount, before tax and after reclassification, of gain (loss) from derivative instrument designated and qualifying cash flow hedge included in assessment of hedge effectiveness. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Details
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