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Basic And Diluted Earnings Per Share (Tables) | 9 Months Ended
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Jan. 31, 2012
Basic And Diluted Earnings Per Share [Abstract] |
Summary Of Basic And Diluted Earnings Per Share |
|  | Three Months Ended January 31, |  |  | Nine Months Ended January 31, |
|  | 2012 |  |  | 2011 |  |  | 2012 |  |  | 2011 |
|  | (in thousands, except per share data) |
Net earnings attributable to common stockholders |  | $ | 11,717 |  |  | $ | 13,975 |  |  | $ | 42,275 |  |  | $ | 38,535 |
Weighted-average common shares outstanding: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic weighted-average number of common shares outstanding |  |  | 46,528 |  |  |  | 45,349 |  |  |  | 46,332 |  |  |  | 45,040 |
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restricted stock |  |  | 567 |  |  |  | 791 |  |  |  | 567 |  |  |  | 604 |
Stock options |  |  | 250 |  |  |  | 579 |  |  |  | 279 |  |  |  | 378 |
ESPP |  |  | — |  |  |  | 1 |  |  |  | 15 |  |  |  | 4 |
Diluted weighted-average number of common shares outstanding |  |  | 47,345 |  |  |  | 46,720 |  |  |  | 47,193 |  |  |  | 46,026 |
Net earnings per common share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic earnings per share |  | $ | 0.25 |  |  | $ | 0.31 |  |  | $ | 0.91 |  |  | $ | 0.86 |
Diluted earnings per share |  | $ | 0.25 |  |  | $ | 0.30 |  |  | $ | 0.90 |  |  | $ | 0.84 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations. + References No definition available. + Details
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