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Retirement Plans - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
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Oct. 31, 2024 | Oct. 31, 2023 | Oct. 31, 2024 | Oct. 31, 2023
Retirement Benefits [Abstract] |  |  |  |
Curtailment settlement due to cross knowledge pension plan | $ 180 | $ 0 | $ 180 | $ 0
Employer defined benefit pension plan contributions | 3,900 | 3,600 | 7,500 | 7,700
Defined contribution plan expense | $ 5,100 | $ 6,700 | $ 12,400 | $ 14,400

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