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Earnings per Share (Tables) | 12 Months Ended
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Dec. 31, 2017
Earnings Per Share [Abstract] |
Summary of Calculation of Basic and Diluted Earnings Per Share | A summary of the calculation of basic and diluted earnings per share (EPS) for the years ended December 31, 2017, 2016 and 2015 is as follows:
(In thousands, except for per share amounts) |  | 2017 |  |  | 2016 |  |  | 2015 |
Numerator |  |  |  |  |  |  |  |  |  |  |  |
Net Income |  | $ | 23,840 |  |  | $ | 35,229 |  |  | $ | 18,646 |
Denominator |  |  |  |  |  |  |  |  |  |  |  |
Weighted average number of shares – basic |  |  | 48,153 |  |  |  | 48,724 |  |  |  | 51,145 |
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |  |
Stock options |  |  | 406 |  |  |  | 170 |  |  |  | 81 |
Restricted stock and restricted stock units |  |  | 140 |  |  |  | 55 |  |  |  | 41 |
Weighted average number of shares – diluted |  | $ | 48,699 |  |  | $ | 48,949 |  |  | $ | 51,267 |
Net income per share – basic |  | $ | 0.50 |  |  | $ | 0.72 |  |  | $ | 0.36 |
Net income per share – diluted |  | $ | 0.49 |  |  | $ | 0.72 |  |  | $ | 0.36 |

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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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