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Net Income Per Common Share (Tables) | 6 Months Ended
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Jun. 30, 2013
Earnings Per Share [Abstract] |
Summary of Weighted Average Number of Common Shares Outstanding | The table below reflects the calculation of the weighted average number of common shares outstanding, on an as if converted basis, used in computing basic and diluted earnings per common share.
|  | Three Months Ended June 30, |  |  | Six Months Ended June 30, |
|  | 2013 |  |  | 2012 |  |  | 2013 |  |  | 2012 |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic weighted average shares outstanding |  |  | 44,681 |  |  |  | 44,447 |  |  |  | 44,463 |  |  |  | 44,410 |
Effect of dilutive stock options and restricted stock |  |  | 1,248 |  |  |  | 722 |  |  |  | 1,227 |  |  |  | 751 |
Diluted weighted average shares outstanding |  |  | 45,929 |  |  |  | 45,169 |  |  |  | 45,690 |  |  |  | 45,161 |

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- Definition Tabular disclosure of the weighted average number of shares used in calculating basic net earnings per share (or unit) and 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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