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Basis of Presentation (Summary of Stock Options Activity) (Details) - $ / shares
9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Shares    
Outstanding at beginning of period (in shares) 215,851 261,936
Granted (in shares) 0 0
Exercised (in shares) (81,401) (9,750)
Forfeited (in shares) (3,250) (7,000)
Outstanding at end of period (in shares) 131,200 245,186
Options exercisable at end of period (in shares) 131,200 245,186
Weighted-Average Exercise Price    
Outstanding at beginning of period (in dollars per share) $ 23.85 $ 23.60
Granted (in dollars per share) 0.00 0.00
Exercised (in dollars per share) 23.34 19.67
Forfeited (in dollars per share) 23.51 26.62
Outstanding at end of period (in dollars per share) 24.15 23.67
Options exercisable at end of period (in dollars per share) $ 24.15 $ 23.67