Share-Based Compensation Plans (Summary Of Stock Option Activity) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Share-Based Compensation Plans [Abstract]
Outstanding at beginning of year, Number of Options	319,275
Exercised, Number of Options	(800)
Expired, Number of Options	(29,616)
Exercisable at the end of period, Number of Options	288,859
Outstanding at beginning of year, Weighted Average Exercise Price	$ 20.22
Exercised, Weighted Average Exercise Price	$ 15.85
Expired, Weighted Average Exercise Price	$ 21.65
Exercisable at end of period, Weighted Average Exercise Price	$ 20.09
Exercisable at the end of period, Weighted Average Remaining Contractual Term	2 years 7 months 6 days
Exercisable at the end of period, Aggregate Intrinsic Value	$ 177