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Allowance for Loan Losses - Schedule of Loans Classified as Troubled Debt Restructuring (Details) - Real Estate- Commercial - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Financing receivable, TBR, accruing $ 86 $ 542
Financing receivable, TBR, nonaccruing $ 1,116 $ 666