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Stock Based Compensation Plan (Details) - $ / shares
 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]    
Outstanding, Beginning of Period, in shares 409,478  
Granted, in shares 55,590  
Stock Options Exercised, in shares (25,047) (45,194)
Forfeited, in shares 0  
Outstanding, End of Period, in shares 440,021  
Exercisable at Period End, in shares 305,099  
Vested and Expected to Vest, in shares 134,922  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]    
Outstanding at Beginning of Period, in dollars per share $ 22.16  
Granted, in dollars per share 25.35  
Excercised, in dollars per share 21.15  
Forfeited, in dollars per share (0.00)  
Outstanding, End of Period, in dollars per share 22.57  
Exercisable at Period End, in dollars per share 21.73  
Vested and Expected to Vest, in dollars per share 24.46  
Fair Value, in dollars per share $ 5.67  
Dividend Yield 3.90%  
Expected Volatility 33.55%  
Risk Free Interest Rate 1.57%  
Expected Lives, in years 7 years 7 months 28 days