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Income Taxes (Schedule Of Significant Components Of Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Thousands | Apr. 30, 2018 | Apr. 30, 2017
--- | --- | ---
Deferred tax assets: |  |
Pension benefits | $ 0 | $ 8,852
Accounts receivable | 4,772 | 6,938
Product liability | 2,180 | 1,272
Employee benefits | 6,513 | 7,914
Other | 2,865 | 862
Gross deferred tax assets, before valuation allowance | 20,267 | 29,921
Valuation allowance | (2,467) | (2,446)
Gross deferred tax assets, after valuation allowance | 17,800 | 27,475
Deferred tax liabilities: |  |
Pension benefits | 1,035 | 0
Inventory | 240 | 297
Depreciation | 21,076 | 9,131
Intangibles | 65,294 | 0
Other | 986 | 0
Total | 88,631 | 9,428
Net deferred tax liability | (70,831) |
Net deferred tax asset |  | 18,047
State [Member] |  |
Deferred tax assets: |  |
State tax credit carryforwards | $ 3,937 | $ 4,083

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