Compensation Programs (Schedule Of Option Award Activity) (Details) (USD $)	12 Months Ended
	Dec. 31, 2011
Compensation Programs [Abstract]
Option awards outstanding at beginning of year, Number of Shares	288,125
Exercises, Number of Shares	(31,875)
Option awards outstanding at end of year, Number of Shares	256,250
Option awards outstanding at beginning of year ,Weighted Average Exercise Price	$ 10.48
Exercises, Weighted Average Exercise Price	$ 8.68
Option awards outstanding at end of year, Weighted Average Exercise Price	$ 10.71