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Stock-Based Compensation Plan (Tables)
3 Months Ended
Mar. 31, 2013
Stock-Based Compensation Plan [Abstract]  
Restricted Stock Activity
        Three Months Ended      
        March 31,        
  2013   2012  
        Weighted       Weighted
        Average       Average
        Grant Date       Grant Date
  Shares     Fair Value Shares     Fair Value
Nonvested, beginning of period 16,500   $ 16.53 13,700   $ 16.11
Granted 10,900     21.80 10,900     16.75
Vested (5,700 )   16.28 (5,150 )   16.04
Forfeited        
Nonvested, end of period 21,700   $ 19.24 19,450   $ 16.49