Income Taxes (Schedule Of Reconciliation Of Changes In Tax Positions) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Income Taxes [Abstract]
Beginning unrecognized tax benefit	$ 2,012	$ 2,728	$ 1,717
Additions for tax positions of prior years	98		1,011
Reductions for tax positions of prior years
Lapse of Statute of Limitations	(1,001)	(716)
Ending unrecognized tax benefit	$ 1,109	$ 2,012	$ 2,728