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Deferred Compensation And Retirement Plans (Total Long-Term Benefit Obligations) (Detail) - USD ($) $ in Thousands | Apr. 30, 2017 | Apr. 30, 2016
--- | --- | ---
Defined Benefit Plan Disclosure [Line Items] |  |
Total benefit obligation | $ 231,348 | $ 234,059
Less: current portion of benefit obligation | (11,443) | (17,946)
Non-current benefit obligation | 219,905 | 216,113
Deferred Compensation and Pension Plans |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total benefit obligation | 95,596 | 99,699
Medical and Life Insurance Plan |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total benefit obligation | 12,147 | 13,006
International Retirement Plans |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total benefit obligation | 12,021 | 15,678
Executive Capital Accumulation Plan |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total benefit obligation | $ 111,584 | $ 105,676

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- Definition For a classified balance sheet, the amount recognized in balance sheet as a current liability associated with an underfunded defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Current Liabilities -URI http://asc.fasb.org/extlink&oid=6509677 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64852052&loc=d3e1703-114919 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 + Details
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