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Troubled Debt Restructuring (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Impaired Financing Receivable And Troubled Debt Restructing [Line Items]    
Impaired Financing Receivable, Troubled Debt Restructuring, Still Accruing $ 0 $ 0
Impaired Financing Receivable, Troubled Debt Restructuring, Nonaccrual 286 319
Impaired Financing Receivable, Trouble Debt Structuring, Total 286 319
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses 0 0
Commercial Real Estate Other Loans [Member]    
Impaired Financing Receivable And Troubled Debt Restructing [Line Items]    
Impaired Financing Receivable, Troubled Debt Restructuring, Still Accruing 0 0
Impaired Financing Receivable, Troubled Debt Restructuring, Nonaccrual 193 212
Impaired Financing Receivable, Trouble Debt Structuring, Total 193 212
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses 0 0
Commercial Real Estate Loans, Total [Member]    
Impaired Financing Receivable And Troubled Debt Restructing [Line Items]    
Impaired Financing Receivable, Troubled Debt Restructuring, Still Accruing 0 0
Impaired Financing Receivable, Troubled Debt Restructuring, Nonaccrual 193 212
Impaired Financing Receivable, Trouble Debt Structuring, Total 193 212
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses 0 0
Residential Real Estate Investment Property Loans [Member]    
Impaired Financing Receivable And Troubled Debt Restructing [Line Items]    
Impaired Financing Receivable, Troubled Debt Restructuring, Still Accruing 0 0
Impaired Financing Receivable, Troubled Debt Restructuring, Nonaccrual 93 107
Impaired Financing Receivable, Trouble Debt Structuring, Total 93 107
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses 0 0
Residential Real Estate Loans, Total [Member]    
Impaired Financing Receivable And Troubled Debt Restructing [Line Items]    
Impaired Financing Receivable, Troubled Debt Restructuring, Still Accruing 0 0
Impaired Financing Receivable, Troubled Debt Restructuring, Nonaccrual 93 107
Impaired Financing Receivable, Trouble Debt Structuring, Total 93 107
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses $ 0 $ 0