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Earnings Per Share | 6 Months Ended
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Jun. 30, 2013
Earnings Per Share [Abstract] |
Earnings Per Share | Note 7. Earnings Per Share The following schedule reconciles the computation of basic and diluted earnings per share for the three months ended June 30, 2013 and 2012:
|  | Three Months Ended June 30, 2013 |  |  | Six Months Ended June 30, 2013 |
|  | Net Income |  |  | Shares |  |  | Per Share |  |  | Net Income |  |  | Shares |  |  | Per Share |
Basic earnings per share |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income available to common stockholders |  | $ | 6,656 |  |  |  | 12,584,942 |  |  | $ | 0.53 |  |  | $ | 13,584 |  |  |  | 12,543,888 |  |  | $ | 1.08 |
Effect of dilutive securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Options to purchase common stock |  |  | — |  |  |  | 296,175 |  |  |  | — |  |  |  | — |  |  |  | 287,152 |  |  |  | — |
Diluted earnings per share |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income available to common stockholders plus assumed exercise of options to purchase common stock |  | $ | 6,656 |  |  |  | 12,881,117 |  |  | $ | 0.52 |  |  | $ | 13,584 |  |  |  | 12,831,040 |  |  | $ | 1.06 |
|  | Three Months Ended June 30, 2012 |  |  | Six Months Ended June 30, 2012 |
|  | Net Income |  |  | Shares |  |  | Per Share |  |  | Net Income |  |  | Shares |  |  | Per Share |
Basic earnings per share |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income available to common stockholders |  | $ | 6,620 |  |  |  | 12,452,112 |  |  | $ | 0.53 |  |  | $ | 11,742 |  |  |  | 10,894,419 |  |  | $ | 1.08 |
Effect of dilutive securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Options to purchase common stock |  |  | — |  |  |  | 282,976 |  |  |  | — |  |  |  | — |  |  |  | 281,373 |  |  |  | — |
Diluted earnings per share |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income available to common stockholders plus assumed exercise of options to purchase common stock |  | $ | 6,620 |  |  |  | 12,735,088 |  |  | $ | 0.52 |  |  | $ | 11,742 |  |  |  | 11,175,792 |  |  | $ | 1.05 |
Options to purchase 100,000 shares of common stock at $16.73 per share were outstanding during the three months ended June 30, 2013, but were not included in the computation of diluted earnings per share because they were anti-dilutive.

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