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Stock-Based Compensation Plans (Tables)
12 Months Ended
Dec. 31, 2013
Stock-Based Compensation Plans [Abstract]  
Allocation of Recognized Period Costs
Schedule Of Fair Value Assumptions
    2013     2012     2011  
 
Risk free interest rate   1.55 %   1.13 %   2.04 %
Expected market volatility factor                  
for the Company's stock   26.44 %   26.08 %   26.28 %
Dividend yield   3.39 %   3.40 %   3.79 %
Expected life of the options (years)   7.0     6.9     6.8  
Options granted   27,000     37,500     30,500  
Estimated fair value of options granted $ 6.63   $ 5.85   $ 4.99  
Stock Option Activity
  Number of             Weighted       Aggregate
  Stock Options     Exercise   Average   Intrinsic   Intrinsic
  Outstanding     Price Range   Exercise Price   Value   Value
        From   To            
Outstanding at January 1, 2013 153,418   $ 18.37 $ 37.60 $ 30.31        
Granted 27,000   $ 35.46 $ 40.62 $ 36.75        
Exercised (16,361 ) $ 18.37 $ 37.60 $ 27.72        
Cancelled (7,388 ) $ 26.99 $ 36.75 $ 29.74        
Outstanding at December 31, 2013 156,669   $ 21.82 $ 40.62 $ 31.72 $ 5.56 $ 1,296
 
Ending vested and expected to                        
vest December 31, 2013 149,084   $ 21.82 $ 40.62 $ 31.91 $ 5.60 $ 1,206
 
Exercisable at December 31, 2013 63,090   $ 21.82 $ 37.60 $ 30.28 $ 5.38 $ 613
Schedule of Restricted Stock Awards Activity
  Number of      
  Restricted Stock     Weighted Average
  Awards     Grant Date
  Outstanding     Fair Value
 
Outstanding at January 1, 2013 0   $ --
Awarded 3,370   $ 35.80
Released (3,370 ) $ 35.80
Forfeited 0   $ --
Outstanding at December 31, 2013 0   $ --
Summary Of Stock Options, By Exercise Price Range
Schedule of Nonvested Performance-based Units Activity
Nonvested Restricted Stock Shares Activity