Income Taxes (Schedule Of Significant Components Of Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Thousands	Apr. 30, 2021	Apr. 30, 2020
Deferred tax assets:
Accounts receivable	$ 1,781	$ 1,730
Deferred Tax Assets, Pension Benefits	815	0
Deferred Tax Assets, Inventory	692	0
Product liability	1,321	862
Employee benefits	5,746	5,189
Operating leases	32,975	33,258
Other	2,086	4,330
Gross deferred tax assets, before valuation allowance	50,849	50,364
Valuation allowance	(4,914)	(4,415)
Gross deferred tax assets, after valuation allowance	45,935	45,949
Deferred tax liabilities:
Inventory	0	125
Depreciation	22,116	24,147
Intangibles	29,123	40,677
Operating leases	31,320	32,325
Other	606	695
Total	83,165	97,969
Net deferred tax liability	37,230	52,020
State [Member]
Deferred tax assets:
Tax credit carryforwards	$ 5,433	$ 4,995