Deferred Compensation and Retirement Plans - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 31, 2025	Oct. 31, 2024	Oct. 31, 2025	Oct. 31, 2024	Apr. 30, 2025
Defined Benefit Plan Disclosure [Line Items]
Increase in market value of the underlying COLI investments			$ 5,070	$ 4,789
CSV of COLI Contracts
Defined Benefit Plan Disclosure [Line Items]
Increase in market value of the underlying COLI investments	$ 2,500	$ 2,500	5,100	4,800
Deferred Compensation Plan | CSV of COLI Contracts
Defined Benefit Plan Disclosure [Line Items]
Gross CSV	343,800		343,800		$ 325,500
Outstanding policy loans	72,800		$ 72,800		$ 72,800
Executive Capital Accumulation Plan
Defined Benefit Plan Disclosure [Line Items]
Deferred compensation arrangement vesting period			5 years
Compensation expense (reduction)	6,400	4,700	$ 18,400	18,200
Increase (decrease) in the fair value of marketable securities	$ 6,700	$ 4,700	$ 19,000	$ 18,900
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