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Loss Per Share and Stockholders' Equity (Tables) | 9 Months Ended
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Jan. 31, 2018
Earnings Per Share [Abstract] |
Computations Of Basic And Diluted Earnings Per Share | The computations of basic and diluted loss per share from continuing operations are as follows:
(in 000s, except per share amounts) |
|  | Three months ended January 31, |  | Nine months ended January 31,
|  | 2018 |  |  | 2017 |  |  | 2018 |  |  | 2017 |
Net loss from continuing operations attributable to shareholders |  | $ | (242,925 | ) |  | $ | (101,212 | ) |  | $ | (519,055 | ) |  | $ | (365,653 | )
Amounts allocated to participating securities |  | (177 | ) |  | (143 | ) |  | (498 | ) |  | (410 | )
Net loss from continuing operations attributable to common shareholders |  | $ | (243,102 | ) |  | $ | (101,355 | ) |  | $ | (519,553 | ) |  | $ | (366,063 | )
Basic weighted average common shares |  | 209,080 |  |  | 207,862 |  |  | 208,693 |  |  | 214,627 |
Potential dilutive shares |  | — |  |  | — |  |  | — |  |  | — |
Dilutive weighted average common shares |  | 209,080 |  |  | 207,862 |  |  | 208,693 |  |  | 214,627 |
Loss per share from continuing operations attributable to common shareholders:
Basic |  | $ | (1.16 | ) |  | $ | (0.49 | ) |  | $ | (2.49 | ) |  | $ | (1.71 | )
Diluted |  | (1.16 | ) |  | (0.49 | ) |  | (2.49 | ) |  | (1.71 | )

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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