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Deferred Compensation and Retirement Plans - Schedule of Components of Net Periodic Benefits Costs (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Jul. 31, 2025 | Jul. 31, 2024
Defined Benefit Plan Disclosure [Line Items] |  |
Expected long-term rate of return on plan assets | 6.25% | 6.00%
Deferred Compensation Plan |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Service cost | $ 11,673 | $ 10,655
Interest cost | 3,884 | 4,451
Amortization of actuarial loss | 127 | 32
Expected return on plan assets | (278) | (266)
Net periodic service credit amortization | (101) | (101)
Net periodic benefit costs | $ 15,305 | $ 14,771

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