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Loans (Schedule of Troubled Debt Restructurings) (Details)
$ in Thousands
Sep. 30, 2020
USD ($)
item
Dec. 31, 2019
USD ($)
item
Financing Receivable, Credit Quality Indicator [Line Items]    
Number of loans | item 84 70
Total Troubled Debt Restructurings | $ $ 2,159 $ 2,193
Performing [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Number of loans | item 83 69
Total Troubled Debt Restructurings | $ $ 2,150 $ 2,180
Performing [Member] | 1-4 family residential, junior lien [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Number of loans | item 1 1
Total Troubled Debt Restructurings | $ $ 110 $ 117
Performing [Member] | Commercial non-owner occupied [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Number of loans | item 1 1
Total Troubled Debt Restructurings | $ $ 838 $ 879
Performing [Member] | Student Loans Purchased [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Number of loans | item 81 67
Total Troubled Debt Restructurings | $ $ 1,202 $ 1,184
Nonperforming [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Number of loans | item 1 1
Total Troubled Debt Restructurings | $ $ 9 $ 13
Nonperforming [Member] | Land and land development [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Number of loans | item 1 1
Total Troubled Debt Restructurings | $ $ 9 $ 13