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Loans and Allowance for Loan Losses - Narrative (Details)
$ in Thousands
6 Months Ended
Jun. 30, 2019
USD ($)
loan
segment
Dec. 31, 2018
USD ($)
Jun. 30, 2018
USD ($)
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Loan portfolio segments | segment 5    
Number of contracts | loan 0    
Number of contracts, subsequent payment default | loan 0    
Other real estate owned | $ $ 1,814 $ 2,495  
Trouble Debt Restructuring [Member]      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Loans that met criteria for restructured | $ $ 62 $ 116  
Number of contracts, nonaccrual | loan 0    
Commercial Real Estate [Member]      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Loans that met criteria for restructured | $     $ 622
Number of contracts | loan 1    
Residential Real Estate [Member]      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Other real estate owned | $ $ 257