Goodwill And Other Intangible Assets (Summary Of Core Deposit Intangibles) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Business Acquisition [Line Items]
Gross carrying amount			$ 21,190	$ 21,190
Accumulated amortization			(11,539)	(9,890)
Total	$ 11,300	$ 13,281	$ 9,651	$ 11,300
Finite-lived Intangible Assets [Roll Forward]
Beginning balance	11,300	13,281
Amortization expense	(1,649)	(1,981)
Ending balance	$ 9,651	$ 11,300