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Income Taxes (Schedule Of Components Of Income Tax Expense (Benefit) For Continuing Operations) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Apr. 30, 2018 | Jan. 31, 2018 | Oct. 31, 2017 | Jul. 31, 2017 | Apr. 30, 2017 | Jan. 31, 2017 | Oct. 31, 2016 | Jul. 31, 2016 | Apr. 30, 2018 | Apr. 30, 2017 | Apr. 30, 2016
Income Tax Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |
Document Fiscal Year Focus |  |  |  |  |  |  |  |  | 2018 |  |
Federal, Current |  |  |  |  |  |  |  |  | $ (53,630) | $ 147,961 | $ 167,233
State, Current |  |  |  |  |  |  |  |  | 25,240 | 15,118 | (26,980)
Foreign, Current |  |  |  |  |  |  |  |  | 9,953 | 10,678 | 8,735
Current income tax expense (benefit) |  |  |  |  |  |  |  |  | (18,437) | 173,757 | 148,988
Federal, Deferred |  |  |  |  |  |  |  |  | 50,505 | 39,299 | 19,937
State, Deferred |  |  |  |  |  |  |  |  | 24,666 | (5,064) | 13,801
Foreign, Deferred |  |  |  |  |  |  |  |  | (14,911) | 378 | 3,200
Deferred taxes |  |  |  |  |  |  |  |  | 60,260 | 34,613 | 36,938
Total income taxes for continuing operations | $ 85,057 | $ 122,120 | $ (87,953) | $ (77,401) | $ 425,333 | $ (49,386) | $ (85,054) | $ (82,523) | $ 41,823 | $ 208,370 | $ 185,926

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