Income Taxes (Schedule Of Significant Components Of Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Thousands	Apr. 30, 2024	Apr. 30, 2023
Deferred tax assets:
Accounts receivable	$ 1,737	$ 2,755
Inventory	3,009	1,902
Product liability	1,395	2,031
Employee benefits	6,112	6,824
Operating leases liabilities	33,454	26,884
Section 174 research and development	9,542	5,258
Other	4,038	1,892
Gross deferred tax assets, before valuation allowance	65,374	53,466
Valuation allowance	(5,878)	(5,573)
Gross deferred tax assets, after valuation allowance	59,496	47,893
Deferred tax liabilities:
Pension benefits	235	227
Depreciation	25,059	22,464
Intangibles	0	6,830
Operating leases right-of-use assets	30,981	24,681
Interest rate swaps	2,448	3,518
Other	647	634
Gross deferred tax liabilities	59,370	58,354
Net deferred tax (asset) liability	(126)
Net deferred tax (asset) liability		10,461
State [Member]
Deferred tax assets:
Tax credit carryforwards	$ 6,087	$ 5,920