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Employer Sponsored Benefit Plans - Additional Information (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Apr. 30, 2026 | Apr. 30, 2025 | Apr. 30, 2024
Defined Contribution Plan Disclosure [Line Items] |  |  |
General And Administrative | $ 59,999 | $ 54,933 | $ 63,133
Contributory Defined Investment Plan |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |
Defined contribution plan, employee contribution percentage | 100.00% |  |
Defined contribution plan, matching contribution percentage | 6.00% |  |
Deferred compensation plan description | We offer two contributory defined investment plans covering substantially all employees, subject to service requirements. Employees may contribute up to 100% of their annual pay, depending on the plan. We generally make discretionary matching contributions of up to 50% of the first 6% of employee contributions to the plan. |  |
Employer contribution to defined benefit plan | $ 2,300 | $ 2,400 | 2,700
Contributory Defined Investment Plan | Maximum |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |
Defined contribution plan, matching contribution percentage of match |  | 50.00% |
Nonelective Contribution Sharing Plan |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |
General And Administrative | $ 5,200 |  |
Employer contribution to defined benefit plan |  | $ 4,600 | $ 9,100

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