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Earnings Per Common Share And Share Awards (Computation Of Basic And Diluted Earnings Per Share) (Details) (USD $)
 3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Earnings Per Common Share And Share Awards [Abstract]        
Net income $ 3,349,488 $ 1,594,805 $ 4,781,627 $ 2,614,012
Weighted average common shares outstanding - Basic 2,098,666 2,134,164 2,099,751 2,184,323
Incremental shares outstanding assuming the exercise of dilutive stock options and SARs (share settled) 34,066 20,952 31,413 17,075
Weighted average common shares outstanding - Diluted 2,132,732 2,155,116 2,131,164 2,201,398
Basic earnings per common share $ 1.60 $ 0.75 $ 2.28 $ 1.20
Diluted earnings per common share $ 1.57 $ 0.74 $ 2.24 $ 1.19