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Earnings Per Share (Tables) | 12 Months Ended
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Dec. 31, 2012
Earnings Per Share [Abstract] |
Earnings Per Share [Table Text Block] |
|  | Years Ended December 31, |
|  | 2012 |  | 2011 |  | 2010 |
|  | (In Thousands, Except Per Share Data |
Numerator, net income |  | $ | 8,403 |  | $ | 7,356 |  | $ | 7,313 |
Denominator: |  |  |  |  |  |  |  |  |  |
Denominator for basic earnings per share, weighted |  |  |  |  |  |  |  |  |  |
average shares |  |  | 3,280 |  |  | 3,073 |  |  | 2,762 |
Effect of dilutive securities, employee stock options |  |  | 5 |  |  | 3 |  |  | 4 |
Denominator for diluted earnings per share, adjusted weighted average |  |  |  |  |  |  |  |  |  |
shares and assumed conversions |  |  | 3,285 |  |  | 3,076 |  |  | 2,766 |
Basic earnings per common share |  | $ | 2.56 |  | $ | 2.39 |  | $ | 2.65 |
Diluted earnings per common share |  | $ | 2.56 |  | $ | 2.39 |  | $ | 2.64 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations. + References No definition available. + Details
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