Goodwill And Other Intangible Assets (Summary Of Other Intangible Assets) (Details) - USD ($)	Dec. 31, 2017	Dec. 31, 2016
Identifiable intangible assets [Abstract]
Gross carrying amount	$ 15,598,000	$ 4,610,000
Less: accumulated amortization	3,357,000	1,947,000
Net carrying amount	12,241,000	2,663,000
Community Banking [Member]
Identifiable intangible assets [Abstract]
Gross carrying amount	12,598,000	1,610,000
Less: accumulated amortization	1,257,000	47,000
Net carrying amount	11,341,000	1,563,000
Insurance Services [Member]
Identifiable intangible assets [Abstract]
Gross carrying amount	3,000,000	3,000,000
Less: accumulated amortization	2,100,000	1,900,000
Net carrying amount	$ 900,000	$ 1,100,000