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Earnings Per Common Share (Detail) (USD $) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2011 | Sep. 30, 2011 | Jun. 30, 2011 | Mar. 31, 2011 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Basic: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income | $ 650,000 | $ 795,000 | $ 640,000 | $ 529,000 | $ 609,000 | $ 670,000 | $ 656,000 | $ 730,000 | $ 756,000 | $ 770,000 | $ 758,000 | $ 709,000 | $ 2,614,177 | $ 2,665,080 | $ 2,993,093
Weighted average common shares outstanding (in shares) |  |  |  |  |  |  |  |  |  |  |  |  | 2,742,003 | 2,728,072 | 2,710,455
Basic net income per share (in dollars per share) |  |  |  |  |  |  |  |  |  |  |  |  | $ 0.95 | $ 0.98 | $ 1.10

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