Premises And Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Depreciation	$ 5,003	$ 5,087	$ 5,884
Property, plant and equipment, gross	172,982	172,267
Less: accumulated depreciation	(96,017)	(93,884)
Property, Plant and Equipment, Net, Total	76,965	78,383
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	34,185	34,538
Buildings and improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 95,662	$ 95,873
Buildings and improvements | Maximum
Property, Plant and Equipment [Line Items]
Estimated Useful Life	30 years	30 years
Buildings and improvements | Minimum
Property, Plant and Equipment [Line Items]
Estimated Useful Life	10 years	10 years
Equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 43,135	$ 41,856
Equipment | Maximum
Property, Plant and Equipment [Line Items]
Estimated Useful Life	7 years	7 years
Equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated Useful Life	3 years	3 years