Stock Plans (Schedule Of Stock Option Activity) (Details) (USD $)	12 Months Ended
	Dec. 31, 2012
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Balance at beginning of year, Shares Subject to Option	4,590
Options exercised, Shares Subject to Option	(4,590)
Balance/Exercisable at end of year, Shares Subject to Option	0
Balance at beginning of year, Weighted-Average Exercise Price	$ 12.48
Options exercised, Weighted-Average Exercise Price	$ 12.48
Balance/Exercisable at end of year, Weighted-Average Exercise Price	$ 0