Equity Incentive Plans (Schedule Of Equity Incentive Plans, Restricted Stock Units Award Activity) (Details)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Equity Incentive Plans [Abstract]
Beginning Balance	38,960	60,021	79,537
Vested	(12,633)	(15,006)	(12,963)
Cancelled or forfeited	(2,578)	(6,055)	(6,553)
Granted	142,647
Ending Balance	166,396	38,960	60,021