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Bank Premises and Equipment, Net (Major Classes of Bank Premises and Equipment and Total Accumulated Depreciation) (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Property, Plant and Equipment [Line Items]    
Bank premises and equipment, gross $ 33,088 $ 32,141
Less accumulated depreciation 13,791 13,058
Bank premises and equipment, net 19,297 19,083
Land [Member]    
Property, Plant and Equipment [Line Items]    
Bank premises and equipment, gross 6,644 6,729
Building and improvements [Member]    
Property, Plant and Equipment [Line Items]    
Bank premises and equipment, gross 18,472 18,100
Furniture and equipment [Member]    
Property, Plant and Equipment [Line Items]    
Bank premises and equipment, gross $ 7,972 $ 7,312