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Loans and Allowance for Loan Losses Schedule of Impaired Loans With and Without an Allowance 2 (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Loans, Impaired [Line Items]    
Impaired loans, with no related allowance, average recorded investment $ 505 $ 1,766
Impaired loans, with no related allowance, interest income, accrual method 5 0
Impaired loans, with related allowance, average recorded investment 0 112
Impaired loans, with related allowance, interest income, accrual method 0 0
Impaired loans, average recorded investment 505 1,878
Impaired loans, interest income, accrual method 5 0
Commercial [Member]    
Loans, Impaired [Line Items]    
Impaired loans, with no related allowance, average recorded investment 91 989
Impaired loans, with no related allowance, interest income, accrual method 0 0
Impaired loans, with related allowance, average recorded investment 0 14
Impaired loans, with related allowance, interest income, accrual method 0 0
Impaired loans, average recorded investment 91 1,003
Impaired loans, interest income, accrual method 0 0
Construction, land and land development [Member]    
Loans, Impaired [Line Items]    
Impaired loans, with no related allowance, average recorded investment 0 0
Impaired loans, with no related allowance, interest income, accrual method 0 0
Impaired loans, with related allowance, average recorded investment 0 0
Impaired loans, with related allowance, interest income, accrual method 0 0
Impaired loans, average recorded investment 0 0
Impaired loans, interest income, accrual method 0 0
1-4 family residential first mortgages [Member]    
Loans, Impaired [Line Items]    
Impaired loans, with no related allowance, average recorded investment 405 103
Impaired loans, with no related allowance, interest income, accrual method 0 0
Impaired loans, with related allowance, average recorded investment 0 0
Impaired loans, with related allowance, interest income, accrual method 0 0
Impaired loans, average recorded investment 405 103
Impaired loans, interest income, accrual method 0 0
Home equity [Member]    
Loans, Impaired [Line Items]    
Impaired loans, with no related allowance, average recorded investment 8 40
Impaired loans, with no related allowance, interest income, accrual method 0 0
Impaired loans, with related allowance, average recorded investment 0 0
Impaired loans, with related allowance, interest income, accrual method 0 0
Impaired loans, average recorded investment 8 40
Impaired loans, interest income, accrual method 0 0
Commercial real estate [Member]    
Loans, Impaired [Line Items]    
Impaired loans, with no related allowance, average recorded investment 1 634
Impaired loans, with no related allowance, interest income, accrual method 5 0
Impaired loans, with related allowance, average recorded investment 0 98
Impaired loans, with related allowance, interest income, accrual method 0 0
Impaired loans, average recorded investment 1 732
Impaired loans, interest income, accrual method 5 0
Consumer and other [Member]    
Loans, Impaired [Line Items]    
Impaired loans, with no related allowance, average recorded investment 0 0
Impaired loans, with no related allowance, interest income, accrual method 0 0
Impaired loans, with related allowance, average recorded investment 0 0
Impaired loans, with related allowance, interest income, accrual method 0 0
Impaired loans, average recorded investment 0 0
Impaired loans, interest income, accrual method $ 0 $ 0