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Earnings per Share (Tables)
 6 Months Ended
Jun. 30, 2015
Earnings per Share [Abstract]  
Computation of earnings per share
The following table sets forth the computation of earnings per share.  Earnings per share calculations give retroactive effect to stock dividends declared by the Company.
 
    Three months ended
    Six months ended
 
    June 30,
    June 30,
 
    2015
    2014
    2015
    2014
Net income applicable to common stock
$3,189,000
$3,365,000
$6,309,000
$6,541,000
         
Basic earnings per share computation
       
Weighted average common shares outstanding
   3,019,661
   3,039,734
     3,022,945
   3,040,822
Earnings per share - basic
$1.06
$1.11
$2.09
$2.15
         
Diluted earnings per share computation
       
Weighted average common shares outstanding for basic earnings per share
   3,019,661
   3,039,734
     3,022,945
   3,040,822
Add: Dilutive effects of restricted stock
          1,064
             927
               534
             405
Weighted average common shares outstanding for dilutive earnings per share
   3,020,725
   3,040,661
     3,023,479
   3,041,227
Earnings per share - diluted
$1.06
$1.11
$2.09
$2.15