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Earnings Per Share (Details) (USD $)
 3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Income (Numerator) [Abstract]        
Net income as reported $ 3,223,000 $ 3,006,000 $ 9,459,000 $ 9,341,000
Less dividends and amortization of premium on preferred stock 181,000 353,000 543,000 1,027,000
Basic EPS: Income available to common shareholders 3,042,000 2,653,000 8,916,000 8,314,000
Diluted EPS: Income available to common shareholders plus assumed conversions $ 3,042,000 $ 2,653,000 $ 8,916,000 $ 8,314,000
Shares (Denominator) [Abstract]        
Weighted average number of common shares outstanding 9,824,568 9,791,550 9,825,719 9,785,063
Incremental shares 22,814 11,843 16,894 10,888
Diluted EPS: Income available to common shareholders plus assumed conversions (in shares) 9,847,382 9,803,393 9,842,613 9,795,951
Per-Share Amount [Abstract]        
Basic EPS: Income available to common shareholders (in dollars per share) $ 0.31 $ 0.27 $ 0.91 $ 0.85
Diluted EPS: Income available to common shareholders plus assumed conversions (in dollars per share) $ 0.31 $ 0.27 $ 0.91 $ 0.85
Schedule of Outstanding Options And Warrants [Line Items]        
Incentive stock options (in shares) 42,000 55,500 42,000 55,500
Warrants issued to U.S. Treasury (in shares) 225,904 225,904 225,904 225,904
Total dilutive securities (in shares) 267,904 281,404 267,904 281,404
In-the-Money [Member]
        
Schedule of Outstanding Options And Warrants [Line Items]        
Incentive stock options (in shares) 0 13,500 0 13,500
Warrants issued to U.S. Treasury (in shares) 225,904 0 225,904 0
Total dilutive securities (in shares) 225,904 13,500 225,904 13,500
Out-of-the-Money [Member]
        
Schedule of Outstanding Options And Warrants [Line Items]        
Incentive stock options (in shares) 42,000 42,000 42,000 42,000
Warrants issued to U.S. Treasury (in shares) 0 225,904 0 225,904
Total dilutive securities (in shares) 42,000 267,904 42,000 267,904