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Earnings Per Share (Details) (USD $)
 3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Dec. 31, 2011
Income (Numerator) [Abstract]          
Net income as reported $ 3,323,000 $ 3,193,000 $ 6,236,000 $ 6,336,000  
Less dividends and amortization of premium on preferred stock 181,000 337,000 362,000 674,000  
Basic EPS: Income available to common shareholders 3,142,000 2,856,000 5,874,000 5,662,000  
Diluted EPS: Income available to common shareholders plus assumed conversions $ 3,142,000 $ 2,856,000 $ 5,874,000 $ 5,662,000  
Shares (Denominator) [Abstract]          
Weighted average number of common shares outstanding 9,824,568 9,784,743 9,822,437 9,781,766  
Incremental shares 19,727 12,238 15,461 10,399  
Diluted EPS: Income available to common shareholders plus assumed conversions (in shares) 9,844,295 9,796,981 9,837,898 9,792,165  
Per-Share Amount [Abstract]          
Basic EPS: Income available to common shareholders (in dollars per share) $ 0.32 $ 0.29 $ 0.60 $ 0.58  
Diluted EPS: Income available to common shareholders plus assumed conversions (in dollars per share) $ 0.32 $ 0.29 $ 0.60 $ 0.58  
Schedule of Outstanding Options And Warrants [Line Items]          
Incentive stock options (in shares) 42,000 55,500 42,000 55,500 51,000
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) 0 0 0 0  
Total dilutive securities (in shares) 0 13,500 0 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) 225,904 225,904 225,904 225,904  
Total dilutive securities (in shares) 267,904 267,904 267,904 267,904