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Earnings Per Share (Tables) | 9 Months Ended
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Sep. 30, 2011
Earnings Per Share [Abstract] |
Calculation Of Basic And Diluted Earnings Per Share |
|  | Three Months Ended |  |  | Nine Months Ended |
|  | September 30, |  |  | September 30, |
(in thousands, except per share data) |  | 2011 |  |  | 2010 |  |  | 2011 |  |  | 2010 |
Net income |  | $ | 19,867 |  |  | $ | 22,469 |  |  | $ | 49,081 |  |  | $ | 60,748 |
Denominator for basic earnings per share - weighted-average number of common shares outstanding during the period |  |  | 58,615 |  |  |  | 61,712 |  |  |  | 59,889 |  |  |  | 62,597 |
Incremental common shares attributable to exercise of outstanding dilutive options |  |  | 177 |  |  |  | 305 |  |  |  | 298 |  |  |  | 474 |
Incremental common shares attributable to outstanding restricted shares, restricted stock units and phantom stock |  |  | 87 |  |  |  | 86 |  |  |  | 204 |  |  |  | 91 |
Denominator for diluted earnings per share |  |  | 58,879 |  |  |  | 62,103 |  |  |  | 60,391 |  |  |  | 63,162 |
Basic earnings per share |  | $ | 0.34 |  |  | $ | 0.36 |  |  | $ | 0.82 |  |  | $ | 0.97 |
Diluted earnings per share |  | $ | 0.34 |  |  | $ | 0.36 |  |  | $ | 0.81 |  |  | $ | 0.96 |

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- Definition Tabular disclosure of the numerators and the denominators of the basic and diluted per-share (or per-unit) computations for income from continuing operations, including the effect that has been given to preferred dividends. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 260 -SubTopic 10 -Publisher FASB -Number -Article -Subparagraph (a) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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