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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, 2018
Dec. 31, 2017
Property, Plant and Equipment [Line Items]    
Bank premises and equipment, gross $ 32,141 $ 31,799
Less accumulated depreciation 13,058 12,220
Bank premises and equipment, net 19,083 19,579
Land [Member]    
Property, Plant and Equipment [Line Items]    
Bank premises and equipment, gross 6,729 6,729
Building and improvements [Member]    
Property, Plant and Equipment [Line Items]    
Bank premises and equipment, gross 18,100 17,970
Furniture and equipment [Member]    
Property, Plant and Equipment [Line Items]    
Bank premises and equipment, gross $ 7,312 $ 7,100