Employee Benefit Plans (Summary Of Stock Option Activity) (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Options Outstanding, beginning balance	173,601	289,544
Options, Granted	13,953	15,475
Options, Exercised	(7,000)	(42,250)
Options, Forfeited	0	(1,500)
Options Outstanding, ending balance	180,554	261,269
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Weighted-Average Exercise Price, Outstanding, beginning balance	$ 35.26	$ 34.38
Weighted-Average Exercise Price, Granted	$ 44.43	$ 37.74
Weighted-Average Exercise Price, Exercised	$ 28.39	$ 33.06
Weighted-Average Exercise Price, Forfeited	$ 0.00	$ 36.90
Weighted-Average Exercise Price, Outstanding, ending balance	$ 36.23	$ 34.77