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Retirement Benefits - Summary of Components of Net Periodic Pension Cost (Detail) $ in Thousands | 12 Months Ended
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Apr. 30, 2024 USD ($)
Retirement Benefits [Abstract] |
Interest cost | $ 890
Expected return on plan assets | $ (1,312)
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Amortization of Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Pension Cost (Reversal of Cost)
Recognition of net loss | $ 580
Net periodic pension expense | $ 158
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Settlement Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Settlement loss included in net income
Effect of settlement | $ 4,019
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Interest Cost, Statement of Income or Comprehensive Income [Extensible Enumeration] | Pension Cost (Reversal of Cost)
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Expected Return (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Pension Cost (Reversal of Cost)
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Settlement and Curtailment Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Pension Cost (Reversal of Cost)
Total net periodic pension expense plus special events | $ 4,177

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