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Consolidated Statements of Changes in Stockholders' Equity (USD $) In Thousands, unless otherwise specified | Common Stock [Member] | Retained Earnings [Member] | Accumulated Other Comprehensive Loss [Member] | Total
--- | --- | --- | --- | ---
Balance at Dec. 31, 2009 | $ 8,667 | $ 113,901 | $ (492) | $ 122,076
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Net income | 0 | 15,569 | 0 | 15,569
Other comprehensive loss, net of tax | 0 | 0 | (2,149) | (2,149)
Cash dividend | 0 | (6,309) | 0 | (6,309)
Balance at Dec. 31, 2010 | 8,667 | 123,161 | (2,641) | 129,187
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Net income | 0 | 17,638 | 0 | 17,638
Other comprehensive loss, net of tax | 0 | 0 | 1,320 | 1,320
Cash dividend | 0 | (6,938) | 0 | (6,938)
Exercise of stock options | 8 | 84 | 0 | 92
Balance at Dec. 31, 2011 | 8,675 | 133,945 | (1,321) | 141,299
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Net income | 0 | 17,747 | 0 | 17,747
Other comprehensive loss, net of tax | 0 | 0 | (1,417) | (1,417)
Cash dividend | 0 | (7,639) | 0 | (7,639)
Exercise of stock options | 10 | 109 | 0 | 119
Balance at Dec. 31, 2012 | $ 8,685 | $ 144,162 | $ (2,738) | $ 150,109

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