Fair Value Measurements (Schedule Of Level 2 Financial Assets And Liabilities Measured On A Recurring Basis) (Details) - Impaired Loans - Fair Value, Measurements, Nonrecurring - Level 3 - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Fair Value Measurement On Nonrecurring Basis Asset And Liabilities Value [Roll Forward]
Beginning balance	$ 9,020	$ 6,916
Loans classified as impaired during the period	0	3,015
Specific valuation allowance allocations	0	0
Fair Value	0	3,015
(Additional) reduction in specific valuation allowance allocations	(474)	(29)
Paydowns, payoffs, other activity	888	(301)
Ending balance	$ 9,434	$ 9,601