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Loans - Troubled Debt Restructurings on Payments (Details) - Subsequently Defaulted [Member]
$ in Thousands
12 Months Ended
Dec. 31, 2020
USD ($)
Loan
Dec. 31, 2019
USD ($)
Loan
Dec. 31, 2018
USD ($)
Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Troubled Debt Restructurings That Subsequently Defaulted, Number of Loans | Loan 2 4 7
Troubled Debt Restructurings That Subsequently Defaulted, Recorded Investment | $ $ 229 $ 2,329 $ 2,856
Residential Real Estate [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Troubled Debt Restructurings That Subsequently Defaulted, Number of Loans | Loan 2   2
Troubled Debt Restructurings That Subsequently Defaulted, Recorded Investment | $ $ 229   $ 121
Commercial Real Estate [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Troubled Debt Restructurings That Subsequently Defaulted, Number of Loans | Loan   1  
Troubled Debt Restructurings That Subsequently Defaulted, Recorded Investment | $   $ 81  
Commercial [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Troubled Debt Restructurings That Subsequently Defaulted, Number of Loans | Loan   3 3
Troubled Debt Restructurings That Subsequently Defaulted, Recorded Investment | $   $ 2,248 $ 2,644
Home Equity and Improvement [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Troubled Debt Restructurings That Subsequently Defaulted, Number of Loans | Loan     1
Troubled Debt Restructurings That Subsequently Defaulted, Recorded Investment | $     $ 30
Consumer Finance [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Troubled Debt Restructurings That Subsequently Defaulted, Number of Loans | Loan     1
Troubled Debt Restructurings That Subsequently Defaulted, Recorded Investment | $     $ 61