Basis of Presentation (Summary of Stock Options Activity) (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Shares
Outstanding at beginning of period (in shares)	261,936	377,907
Granted (in shares)	0	0
Exercised (in shares)	(5,000)	(9,835)
Forfeited (in shares)	(5,500)	(1,800)
Outstanding at end of period (in shares)	251,436	366,272
Options exercisable at end of period (in shares)	251,436	366,272
Weighted-Average Exercise Price
Outstanding at beginning of period (in dollars per share)	$ 23.60	$ 22.62
Granted (in dollars per share)	$ 0.00	$ 0.00
Exercised (in dollars per share)	$ 19.13	$ 16.69
Forfeited (in dollars per share)	$ 26.88	$ 26.68
Outstanding at end of period (in dollars per share)	$ 23.62	$ 22.76
Options exercisable at end of period (in dollars per share)	$ 23.62	$ 22.76