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Earnings Per Share (Tables) | 6 Months Ended
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Dec. 31, 2011
Earnings Per Share [Abstract] |
Computation Of Basic And Diluted Earnings Per Share |
|  | Three Months Ended December 31, |  |  | Six Months Ended December 31, |
|  | 2011 |  |  | 2010 |  |  | 2011 |  |  | 2010 |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income |  | $ | 20,038 |  |  | $ | 16,267 |  |  | $ | 31,728 |  |  | $ | 25,362 |
Denominator (in thousands): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Denominator for basic earnings per share - weighted average shares outstanding during the period |  |  | 44,158 |  |  |  | 42,929 |  |  |  | 44,044 |  |  |  | 42,876 |
Effect of dilutive stock options and unvested restricted stock |  |  | 1,494 |  |  |  | 1,405 |  |  |  | 1,460 |  |  |  | 1,250 |
Denominator for diluted earnings per share - adjusted weighted average shares and assumed conversions |  |  | 45,652 |  |  |  | 44,334 |  |  |  | 45,504 |  |  |  | 44,126 |
Basic net income per share |  | $ | 0.45 |  |  | $ | 0.38 |  |  | $ | 0.72 |  |  | $ | 0.59 |
Diluted net income per share |  | $ | 0.44 |  |  | $ | 0.37 |  |  | $ | 0.70 |  |  | $ | 0.57 |

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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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