Income Taxes (Narrative) (Details) - $ / shares |
3 Months Ended | |
|---|---|---|
Aug. 31, 2017 |
Aug. 31, 2016 |
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| Income Taxes [Abstract] | ||
| Effective income tax rate | 34.40% | 33.00% |
| Diluted earnings per share impact of discrete tax benefit | $ 0.01 | $ 0.04 |
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- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Per share amount of earnings, after tax, of an event or transaction that is unusual in nature or infrequent in occurrence, or both. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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