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Earnings Per Share (Tables) | 3 Months Ended
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Aug. 31, 2013
Earnings Per Share [Abstract] |
Computation of basic and diluted earnings per share | The following table sets forth the computation of basic and diluted earnings per share using the two-class method for amounts attributable to Cintas’ common shares:
| Three Months Ended
(In thousands except per share data) | August 31, 2013 |  | August 31, 2012
Basic Earnings per Share |  |  |  |  |
Net income | $ | 77,754 |  |  | $ | 76,733 |
Less: net income allocated to participating unvested securities | 460 |  |  | 365 |
Net income available to common shareholders | $ | 77,294 |  |  | $ | 76,368 |
Basic weighted average common shares outstanding | 122,130 |  |  | 126,110 |
Basic earnings per common share | $ | 0.63 |  |  | $ | 0.61 |
Diluted Earnings per Share |  |  |  |  |
Net income | $ | 77,754 |  |  | $ | 76,733 |
Less: net income allocated to participating unvested securities | 460 |  |  | 365 |
Net income available to common shareholders | $ | 77,294 |  |  | $ | 76,368 |
Basic weighted average common shares outstanding | 122,130 |  |  | 126,110 |
Effect of dilutive securities – employee stock options | 762 |  |  | 348 |
Diluted weighted average common shares outstanding | 122,892 |  |  | 126,458 |
Diluted earnings per share | $ | 0.63 |  |  | $ | 0.60 |

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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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