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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, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Earnings Per Share [Abstract]        
Net income attributable to the Company $ 4,005,675 $ 3,349,488 $ 7,382,405 $ 4,781,627
Weighted average common shares outstanding - Basic 2,063,797 2,098,666 2,054,300 2,099,751
Incremental shares outstanding assuming the exercise of dilutive stock options and SARs (share settled) 25,877 34,066 32,929 31,413
Weighted average common shares outstanding - Diluted 2,089,674 2,132,732 2,087,229 2,131,164
Basic earnings per common share $ 1.94 $ 1.60 $ 3.59 $ 2.28
Diluted earnings per common share $ 1.92 $ 1.57 $ 3.54 $ 2.24