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8. Earnings Per Share (Tables) | 6 Months Ended
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Jun. 30, 2015
Earnings Per Share [Abstract] |
Schedule of weighted-average common shares outstanding used to calculate basic and diluted earnings per shares and the anti-dilutive shares | The weighted average number of common shares outstanding used to calculate basic and diluted earnings per share, and the anti-dilutive shares that are excluded from the diluted earnings per share calculation are as follows (in thousands):
| Three Months Ended |  | Six Months Ended
| June 30, |  | June 30,
| 2015 |  | 2014 |  | 2015 |  | 2014
Basic weighted average shares outstanding | 29,136 |  |  | 28,826 |  |  | 29,114 |  |  | 28,809 |
Effect of potentially dilutive stock options and restricted stock awards | 245 |  |  | 266 |  |  | 224 |  |  | 267 |
Diluted weighted average common shares | 29,381 |  |  | 29,092 |  |  | 29,338 |  |  | 29,076 |
Anti-dilutive shares | 57 |  |  | 107 |  |  | 106 |  |  | 94 |

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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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