Premises And Equipment (Major Categories Of Premises And Equipment And Accumulated Depreciation) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	$ 57,523	$ 45,216
Less accumulated depreciation	23,314	21,479
Total premises and equipment, net	34,209	23,737
Land [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	10,061	6,741
Building and improvements [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	29,620	23,028
Furniture and equipment [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	$ 17,842	$ 15,447