Deferred Compensation and Retirement Plans - Schedule of Components of Net Periodic Benefits Costs (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 31, 2025	Oct. 31, 2024	Oct. 31, 2025	Oct. 31, 2024
Defined Benefit Plan Disclosure [Line Items]
Expected long-term rate of return on plan assets			6.25%	6.00%
Deferred Compensation Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 12,790	$ 11,825	$ 24,463	$ 22,480
Interest cost	3,939	4,513	7,823	8,964
Amortization of actuarial loss	127	32	254	64
Expected return on plan assets	(278)	(266)	(556)	(532)
Net periodic service credit amortization	(101)	(102)	(202)	(203)
Net periodic benefit costs	$ 16,477	$ 16,002	$ 31,782	$ 30,773