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Earnings Per Share (Tables) | 9 Months Ended
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Sep. 30, 2014
Earnings Per Share [Abstract] |
Calculation of Basic and Diluted Earnings per Share |
The following table sets forth the calculation of basic and diluted earnings per share.
|  |  | Three Months Ended |  | Nine Months Ended
|  |  | September 30, |  | September 30,
(in thousands, except per share data) |  |  | 2014 |  |  | 2013 |  |  | 2014 |  |  | 2013
Net income |  | $ | 17,156 |  | $ | 23,726 |  | $ | 58,431 |  | $ | 43,670
Denominator for basic earnings per share - |  |  |  |  |  |  |  |  |  |  |  |
| weighted-average number of common |  |  |  |  |  |  |  |  |  |  |  |
| shares outstanding during the period |  |  | 53,660 |  |  | 54,087 |  |  | 53,712 |  |  | 54,361
Incremental common shares attributable to |  |  |  |  |  |  |  |  |  |  |  |
| exercise of outstanding dilutive options |  |  | 445 |  |  | 360 |  |  | 460 |  |  | 284
Incremental common shares attributable |  |  |  |  |  |  |  |  |  |  |  |
| to outstanding restricted shares and |  |  |  |  |  |  |  |  |  |  |  |
| restricted stock units |  |  | 160 |  |  | 164 |  |  | 215 |  |  | 223
Denominator for diluted earnings per share |  |  | 54,265 |  |  | 54,611 |  |  | 54,387 |  |  | 54,868
Basic earnings per share |  | $ | 0.32 |  | $ | 0.44 |  | $ | 1.09 |  | $ | 0.80
Diluted earnings per share |  | $ | 0.32 |  | $ | 0.43 |  | $ | 1.07 |  | $ | 0.80

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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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