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Premises and Equipment - Summary of Premises and Equipment (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Property, Plant and Equipment [Line Items]    
Land $ 685 $ 685
Buildings 6,491 6,445
Equipment and fixtures 7,426 5,763
Property plant and equipment gross 14,602 12,893
Accumulated depreciation (11,496) (9,522)
Property plant and equipment net $ 3,106 $ 3,371
Building [Member] | Minimum    
Property, Plant and Equipment [Line Items]    
Useful lives 5 years  
Building [Member] | Maximum    
Property, Plant and Equipment [Line Items]    
Useful lives 50 years  
Equipment [Member] | Minimum    
Property, Plant and Equipment [Line Items]    
Useful lives 5 years  
Equipment [Member] | Maximum    
Property, Plant and Equipment [Line Items]    
Useful lives 30 years