Fair value measurements - Assets and Liabilities (Details) - Fair Value, Recurring - USD ($) $ in Thousands |
Jul. 31, 2026 |
Jul. 31, 2025 |
|---|---|---|
| Fair value measurements | ||
| Commodity derivatives, assets | $ 5,370 | $ 3,570 |
| Commodity derivatives, liabilities | (9,468) | (3,654) |
| Level 1 | ||
| Fair value measurements | ||
| Commodity derivatives, assets | 0 | 0 |
| Commodity derivatives, liabilities | 0 | 0 |
| Level 2 | ||
| Fair value measurements | ||
| Commodity derivatives, assets | 5,370 | 3,570 |
| Commodity derivatives, liabilities | (9,468) | (3,654) |
| Level 3 | ||
| Fair value measurements | ||
| Commodity derivatives, assets | 0 | 0 |
| Commodity derivatives, liabilities | $ 0 | $ 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/disclosureRef
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- Definition Fair value as of the balance sheet date of all price risk derivative assets designated as cash flow hedging instruments. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Fair value as of the balance sheet date of all price risk derivative liabilities designated as cash flow hedging instruments. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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