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	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 1,871	$ 3,887
Impairment losses on investment securities	0	0
Included in other comprehensive income	109	(2,121)
Dispositions	0	0
Transfers into Level 3	0	0
Ending Balance	$ 1,980	$ 1,766