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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, 2021
Mar. 31, 2020
Loans, Impaired [Line Items]    
Impaired loans, with no related allowance, average recorded investment $ 374 $ 505
Impaired loans, with no related allowance, interest income, accrual method 0 5
Impaired loans, with related allowance, average recorded investment 15,817 0
Impaired loans, with related allowance, interest income, accrual method 0 0
Impaired loans, average recorded investment 16,191 505
Impaired loans, interest income, accrual method 0 5
Commercial [Member]    
Loans, Impaired [Line Items]    
Impaired loans, with no related allowance, average recorded investment 0 91
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 91
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 374 405
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 374 405
Impaired loans, interest income, accrual method 0 0
Home equity [Member]    
Loans, Impaired [Line Items]    
Impaired loans, with no related allowance, average recorded investment 0 8
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 8
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 0 1
Impaired loans, with no related allowance, interest income, accrual method 0 5
Impaired loans, with related allowance, average recorded investment 15,817 0
Impaired loans, with related allowance, interest income, accrual method 0 0
Impaired loans, average recorded investment 15,817 1
Impaired loans, interest income, accrual method 0 5
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