Fair Value Measurements (Schedule Of Reconciliation Of Investment Securities Available For Sale Measured At Fair Value On A Recurring Basis Level 3 Assets) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Fair Value Measurements [Abstract]
Beginning balance	$ 1,982	$ 2,504
Included in other comprehensive income	61	911
Ending Balance	$ 2,043	$ 3,415