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Net Income per Share (Tables) | 6 Months Ended
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Jun. 30, 2014
Earnings Per Share [Abstract] |
Summary of the net income allocated to common shares and the basic and diluted shares used in the net income per share computations | The following table summarizes the net income allocated to common shares and the basic and diluted shares used in the net income per share computations:
|  | Three Months Ended June 30, |  | Six Months Ended June 30,
|  | 2014 |  | 2013 |  | 2014 |  | 2013
|  | (in thousands)
Net income |  | $ | 1,891 |  |  | $ | 3,488 |  |  | $ | 11,455 |  |  | $ | 16,661 |
Less distributed and undistributed earnings allocated to participating securities |  | (139 | ) |  | (124 | ) |  | (333 | ) |  | (481 | )
Net income allocated to common shares |  | $ | 1,752 |  |  | $ | 3,364 |  |  | $ | 11,122 |  |  | $ | 16,180 |
Weighted average common shares outstanding |  | 24,770 |  |  | 24,820 |  |  | 24,797 |  |  | 24,858 |
Incremental shares from assumed conversions of common stock options |  | 4 |  |  | 24 |  |  | 5 |  |  | 27 |
Adjusted weighted average common shares outstanding |  | 24,774 |  |  | 24,844 |  |  | 24,802 |  |  | 24,885 |
Potentially dilutive securities not included in weighted average share calculation due to anti-dilutive effect |  | — |  |  | 16 |  |  | — |  |  | 16 |

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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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