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Loans and Allowance for Loan Losses - Troubled Debt Restructurings (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2021
USD ($)
contract
Mar. 31, 2020
USD ($)
contract
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Number of Loans | contract 3 2
Total Modifications $ 148 $ 62
1-4 Family Residential Real Estate Loans    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Number of Loans | contract 2  
Total Modifications $ 130  
Commercial Real Estate Loans    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Number of Loans | contract   1
Total Modifications   $ 59
Commercial loans    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Number of Loans | contract 1 1
Total Modifications $ 18 $ 3
Extended Amortization Period    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Total Modifications 0 0
Extended Amortization Period | 1-4 Family Residential Real Estate Loans    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Total Modifications 0  
Extended Amortization Period | Commercial Real Estate Loans    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Total Modifications   0
Extended Amortization Period | Commercial loans    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Total Modifications 0 0
Interest Rate Reduction    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Total Modifications 0 0
Interest Rate Reduction | 1-4 Family Residential Real Estate Loans    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Total Modifications 0  
Interest Rate Reduction | Commercial Real Estate Loans    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Total Modifications   0
Interest Rate Reduction | Commercial loans    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Total Modifications 0 0
Combination    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Total Modifications 148 62
Combination | 1-4 Family Residential Real Estate Loans    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Total Modifications 130  
Combination | Commercial Real Estate Loans    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Total Modifications   59
Combination | Commercial loans    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Total Modifications $ 18 $ 3