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Loans and Allowance for Credit Losses (Rollforward of TDRs) (Details) - USD ($) $ in Thousands | 9 Months Ended
--- | ---
Sep. 30, 2021 | Sep. 30, 2020
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
TDR beginning balance | $ 7,255 | $ 9,193
New TDRs |  | 1,506
Disbursements (Payments) | (378) | (633)
Payoffs | (900) | (1,425)
TDR ending balance | 5,977 | 8,641
TDR, Related Allowance | 84 | 156
Impaired Nonaccrual Loans [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
TDR beginning balance | 258 | 1,692
New TDRs |  | 1,506
Disbursements (Payments) | (31) | (482)
Payoffs |  | (1,342)
TDR ending balance | 227 | 1,374
Impaired Nonaccrual Loans [Member] | Residential Portfolio Segment [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
TDR beginning balance |  | 1,393
Disbursements (Payments) |  | (51)
Payoffs |  | (1,342)
Impaired Nonaccrual Loans [Member] | Commercial Real Estate Portfolio Segment [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
New TDRs |  | 1,506
Disbursements (Payments) |  | (401)
TDR ending balance |  | 1,105
Impaired Nonaccrual Loans [Member] | Commercial Portfolio Segment [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
TDR beginning balance | 258 | 299
Disbursements (Payments) | (31) | (30)
TDR ending balance | 227 | 269
Impaired Accruing Restructured Loans [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
TDR beginning balance | 6,997 | 7,501
Disbursements (Payments) | (347) | (151)
Payoffs | (900) | (83)
TDR ending balance | 5,750 | 7,267
TDR, Related Allowance | 84 | 156
Impaired Accruing Restructured Loans [Member] | Residential Portfolio Segment [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
TDR beginning balance | 3,845 | 4,041
Disbursements (Payments) | (82) | (80)
Payoffs | (900) | (83)
TDR ending balance | 2,863 | 3,878
TDR, Related Allowance | 84 | 142
Impaired Accruing Restructured Loans [Member] | Commercial Real Estate Portfolio Segment [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
TDR beginning balance | 3,118 | 3,419
Disbursements (Payments) | (258) | (66)
TDR ending balance | 2,860 | 3,353
TDR, Related Allowance |  | 14
Impaired Accruing Restructured Loans [Member] | Construction Loans [Member] | Commercial and Residential Real Estate Portfolio Segment [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
TDR beginning balance | 34 | 41
Disbursements (Payments) | (7) | (5)
TDR ending balance | $ 27 | $ 36

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