Stock-Based Compensation Plans (Summary of Nonvested Stock Options) (Details) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Awards      
Nonvested, beginning 34,950    
Granted 4,500    
Vested (17,000)    
Forfeited (1,350)    
Nonvested, ending 21,100 34,950  
Weighted- Average Grant Date Fair Value      
Nonvested, beginning $ 11.23    
Granted $ 8.92 $ 15.97 $ 13.00
Vested $ 9.88    
Forfeited $ 12.05    
Nonvested, ending $ 11.77 $ 11.23