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v3.22.2

Benefit Plans (Details) $ in Thousands | 12 Months Ended
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Apr. 30, 2022 USD ($) executive shares | Apr. 30, 2021 USD ($) shares | Apr. 30, 2020 USD ($)
Other Postretirement Benefits Plan |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block |  |  |
Employer discretionary contribution | $ 10,983 | $ 10,382 | $ 10,571
Common stock held by trustee of the 401K plan (shares) | shares | 807,396 | 909,161 |
Supplemental Employee Retirement Plan |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block |  |  |
Number of executives covered under SERP | executive | 2 |  |
Number of executives covered under SERP, retired | executive | 1 |  |
Annual benefit amount (percent of base compensation) | 50.00% |  |
Duration of benefits | 20 years |  |
Accrued deferred compensation liability | $ 2,211 | $ 2,866 |
Expected future payments, 2022 | 637 |  |
Expected future payments, 2023 | 637 |  |
Expected future payments, 2024 | 355 |  |
Expected future payments, 2025 | 355 |  |
Expected future payments, 2026 | 355 |  |
Pension and post-retirement expense incurred | $ 18 | $ 67 | $ 269
Minimum | Supplemental Employee Retirement Plan |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block |  |  |
Discount rate | 3.35% | 1.36% |
Maximum | Supplemental Employee Retirement Plan |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block |  |  |
Discount rate | 4.18% | 2.52% |

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