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The compensation expense or (income) recognized during the period pertaining to the deferred compensation arrangement.

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Option to receive employee benefits by quarterly installments periods.

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Policy Loans Payable

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Minimum period when individual is required to perform service to be fully vested under deferred compensation arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of unrealized and realized gain (loss) on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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The change in cash surrender or contract value during the period which adjusted the amount of premiums paid in determining the expense or income recognized under the contract for the period.

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Deferred Compensation and Retirement Plans - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Jul. 31, 2026	Jul. 31, 2025	Apr. 30, 2026
Defined Benefit Plan Disclosure [Line Items]
Increase in market value of the underlying COLI investments	$ 2,497	$ 2,569
CSV of COLI Contracts
Defined Benefit Plan Disclosure [Line Items]
Increase in market value of the underlying COLI investments	2,500	2,600
Deferred Compensation Plan \| CSV of COLI Contracts
Defined Benefit Plan Disclosure [Line Items]
Gross CSV	377,000		$ 361,200
Outstanding policy loans	$ 72,100		$ 72,200
Executive Capital Accumulation Plan
Defined Benefit Plan Disclosure [Line Items]
Deferred compensation arrangement vesting period	5 years
Compensation expense (reduction)	$ 5,200	12,000
Increase (decrease) in the fair value of marketable securities	$ 4,800	$ 12,300
Executive Capital Accumulation Plan \| Minimum
Defined Benefit Plan Disclosure [Line Items]
Option to receive employee benefits by quarterly installments periods	1 year
Executive Capital Accumulation Plan \| Maximum
Defined Benefit Plan Disclosure [Line Items]
Option to receive employee benefits by quarterly installments periods	15 years