Employee Benefit and Retirement Plans (Net Periodic Pension Cost) (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2023	Apr. 30, 2022	Apr. 30, 2021
Retirement Benefits [Abstract]
Interest cost	$ 0	$ 3,147	$ 4,662
Expected return on plan assets		(3,601)	(8,430)
Recognized net actuarial loss		0	1,761
Defined Benefit Plan, Amortization of Gain (Loss)		(1,164)	0
Pension settlement, net	$ 7	(68,473)	0
Pension benefit cost		$ (69,183)	$ 2,007
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible Enumeration]		Other Nonoperating Income (Expense)	Other Nonoperating Income (Expense)