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Earnings per Share (Tables) | 3 Months Ended
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Aug. 31, 2011
Earnings per Share |
Computation of basic and diluted earnings per share |
(In thousands except per share data) |  | Three Months Ended
|  |  | August 31, 2011 |  |  |  | August 31, 2010 |
Basic Earnings per Share |  |  |  |  |  |  |  |
Net income |  |  | $ | 68,638 |  |  |  | $ | 61,277 |
Less: net income allocated to participating unvested securities |  |  | 370 |  |  |  | 227 |
Net income available to common shareholders |  |  | $ | 68,268 |  |  |  | $ | 61,050 |
Basic weighted average common shares outstanding |  |  | 131,309 |  |  |  | 152,164 |
Basic earnings per share |  |  | $ | 0.52 |  |  |  | $ | 0.40 |
Diluted Earnings per Share |  |  |  |  |  |  |  |
Net income |  |  | $ | 68,638 |  |  |  | $ | 61,277 |
Less: net income allocated to participating unvested securities |  |  | 370 |  |  |  | 227 |
Net income available to common shareholders |  |  | $ | 68,268 |  |  |  | $ | 61,050 |
Basic weighted average common shares outstanding |  |  | 131,309 |  |  |  | 152,164 |
Effect of dilutive securities – employee stock options |  |  | 29 |  |  |  | — |
Diluted weighted average common shares outstanding |  |  | 131,338 |  |  |  | 152,164 |
Diluted earnings per share |  |  | $ | 0.52 |  |  |  | $ | 0.40 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations. + Details
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