Employee Benefits (Schedule Of Stock Option Activity) (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Employee Benefits [Abstract]
Outstanding at December 31, Number of Options	73,814	202,215	379,324
Exercised, Number of Options			(38,100)
Canceled/expired, Number of Options	(68,814)	(128,401)	(139,009)
Outstanding at December 31, Number of Options	5,000	73,814	202,215
Total exercisable at December 31, Number of Options	5,000	73,814	202,215
Outstanding at December 31, Weighted Average Exercise Price	$ 24.72	$ 24.00	$ 20.98
Exercised, Weighted Average Exercise Price			$ 5.29
Canceled/expired, Weighted Average Exercise Price	$ 25.28	$ 23.59	$ 20.89
Outstanding at December 31, Weighted Average Exercise Price	$ 16.93	$ 24.72	$ 24.00
Total exercisable at December 31, Weighted Average Exercise Price	$ 16.93	$ 24.72	$ 24.00
Outstanding, Remaining Contractual Life	26 days