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Earnings Per Share (Tables)
12 Months Ended
Dec. 31, 2014
Earnings Per Share [Abstract]  
Schedule of computation of earnings per share
  2014  2013  2012 
          
Weighted average shares outstanding  1,651,045   1,652,700   1,663,147 
Effect of dilutive stock options outstanding  0   0   58 
             
Diluted weighted average shares outstanding  1,651,045   1,652,700   1,663,205 
             
Basic earnings per share $3.90  $2.87  $3.61 
             
Diluted earnings per share $3.90  $2.87  $3.61