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Reconciliation of Net Income Loss Per Share (Tables) | 12 Months Ended
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Dec. 31, 2012
Reconciliation of Net Income Per Share [Abstract] |
Summary of Reconciliation of Net Income (Loss) Per Share |
|  | Year ended December 31, |
|  | 2012 |  |  | 2011 |  |  | 2010 |
Net income |  | $ | 24,268 |  |  | $ | 20,937 |  |  | $ | 6,416 |
Weighted average shares outstanding |  |  | 17,009 |  |  |  | 16,817 |  |  |  | 16,455 |
Effective of dilutive stock options |  |  | 105 |  |  |  | 136 |  |  |  | 115 |
Diluted shares outstanding |  |  | 17,114 |  |  |  | 16,953 |  |  |  | 16,570 |
Basic net income per share |  | $ | 1.43 |  |  | $ | 1.24 |  |  | $ | 0.39 |
Diluted net income per share |  | $ | 1.42 |  |  | $ | 1.24 |  |  | $ | 0.39 |

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- Definition Tabular disclosure of the reconciliation of basic net earnings per share (or unit) to diluted earnings per share (or unit). + 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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