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Bank Premises and Equipment (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Property, Plant and Equipment [Line Items]    
Bank premises and equipment, Gross $ 26,273 $ 25,863
Accumulated depreciation and amortization (20,203) (18,487)
Bank premises and equipment, net 6,070 7,376
Depreciation and amortization 2,228 2,143
Leasehold improvements    
Property, Plant and Equipment [Line Items]    
Bank premises and equipment, Gross 15,287 15,024
Furniture and equipment    
Property, Plant and Equipment [Line Items]    
Bank premises and equipment, Gross $ 10,986 $ 10,839