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Earnings Per Common Share (Tables)
9 Months Ended
Sep. 30, 2012
Earnings Per Common Share [Abstract]  
Weighted Average Number Of Shares Used In Computing Earnings Per Share
  Three Months Ended Nine Months Ended
  September 30, September 30,
  2012 2011 2012 2011
 
Average number of common shares outstanding 3,341,050 3,302,082 3,328,065 3,287,943
Effect of dilutive common stock 11,287 9,390 9,643 7,953
Average number of common shares outstanding        
used to calculate diluted earnings per share 3,352,337 3,311,472 3,337,708 3,295,896