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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Parenthetical) - USD ($) $ in Thousands | 12 Months Ended
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Apr. 30, 2025 | Apr. 30, 2024 | Apr. 30, 2023
Other comprehensive income (loss): |  |  |
Unamortized retirement costs, tax (expense) benefit | $ 552 | $ (2,010) | $ 5,967
Unrealized gain on interest rate swaps, tax (expense) | $ 1,450 | $ (663) | $ (393)

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- Definition Amount, after reclassification, of tax expense (benefit) for gain (loss) from derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness, attributable to parent. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-12 + Details
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