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Income Taxes (Schedule Of Effective Income Tax Rate Reconciliation) (Details) - USD ($) $ in Millions | 12 Months Ended
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Apr. 30, 2016 | Apr. 30, 2015 | Apr. 30, 2014
Income Tax Disclosure [Abstract] |  |  |
Federal statutory rate | 35.00% | 35.00% | 35.00%
Research and experimentation tax credit | (0.00%) | (2.30%) | (0.00%)
Meals and entertainment | 0.30% | 0.50% | 0.80%
Domestic production deduction | (2.50%) | (2.40%) | (1.80%)
Other | (0.10%) | 0.10% | 0.70%
Total | (2.30%) | (4.10%) | (0.30%)
Effective federal income tax rate | 32.70% | 30.90% | 34.70%
State income taxes, net of federal tax effect | 3.30% | 3.80% | 4.50%
Effective income tax rate | 36.00% | 34.70% | 39.20%
Income taxes paid | $ 24.5 | $ 13.3 | $ 4.3

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- Definition Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to domestic production deduction. + References No definition available. + Details
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- Definition The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4297-108586 + Details
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