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Income Taxes (Tables) | 6 Months Ended
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Oct. 31, 2017
Income Taxes [Abstract] |
Summary of Effective Income Tax Rate | The following table summarizes the effective tax rate for the three and six months ended October 31, 2017:
|  | Three Months |  |  | Six Months |
|  | Ended October 31, |  |  | Ended October 31, |
|  | 2017 |  |  | 2016 |  |  | 2017 |  |  | 2016 |
Effective Tax Rate as Reported |  |  | 24.4 | % |  |  | 126.4 | % |  |  | 19.0 | % |  |  | 76.7 | %
Impact of an unfavorable German court decision in 2016 |  |  | - |  |  |  | (109.5 | )% |  |  | - |  |  |  | (56.8 | )%
Effective Tax Rate excluding the impact of an unfavorable German court decision in 2016 |  |  | 24.4 | % |  |  | 16.9 | % |  |  | 19.0 | % |  |  | 19.9 | %
Impact of a reduction in the statutory rate in the U.K. in 2016 on deferred tax balances |  |  | - |  |  |  | 6.0 | % |  |  | - |  |  |  | 3.1 | %
Effective Tax Rate excluding the impact of an unfavorable German court decision and U.K. tax rate change |  |  | 24.4 | % |  |  | 22.9 | % |  |  | 19.0 | % |  |  | 23.0 | %

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- Definition Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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