Employee Benefit and Retirement Plans (Reconciliation Of Benefit Obligations, Plan Assets, And Funded Status) (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2023	Apr. 30, 2022	Apr. 30, 2021
Retirement Benefits [Abstract]
Projected benefit obligation at beginning of year	$ 0	$ 196,537
Interest cost	0	3,147	$ 4,662
Acturial (gains) and losses	0	(3,738)
Benefits paid	0	(4,214)
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Settlement	0	191,732
Projected benefit obligation at end of year	0	0	196,537
Fair value of plan assets at beginning of year	979	193,552
Actual return on plan assets	27	3,373
Benefits paid	0	(4,214)
Defined Benefit Plan, Plan Assets, Payment for Settlement	0	191,732
Transfer to defined contribution plan	1,006	0
Fair value of plan assets at end of year	0	979	$ 193,552
Funded status of the plan	$ 0	$ (979)