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Loans and Allowance for Credit Losses (Rollforward of TDRs) (Details) - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Jun. 30, 2020 | Jun. 30, 2019
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
TDR beginning balance | $ 9,193 | $ 11,781
New TDRs | 1,506 |
Disbursements (Payments) | (549) | (2,053)
Charge offs |  | (3)
Payoffs | (83) | (197)
TDR ending balance | 10,067 | 9,528
TDR, Related Allowance | 279 | 414
Impaired Nonaccrual Loans [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
TDR beginning balance | 1,692 | 3,118
New TDRs | 1,506 |
Disbursements (Payments) | (443) | (1,355)
Charge offs |  | (3)
TDR ending balance | 2,755 | 1,760
TDR, Related Allowance | 75 | 159
Impaired Nonaccrual Loans [Member] | Residential Portfolio Segment [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
TDR beginning balance | 1,393 |
Disbursements (Payments) | (51) |
TDR ending balance | 1,342 |
TDR, Related Allowance | 75 |
Impaired Nonaccrual Loans [Member] | Commercial Real Estate Portfolio Segment [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
New TDRs | 1,506 |
Disbursements (Payments) | (373) |
TDR ending balance | 1,133 |
Impaired Nonaccrual Loans [Member] | Commercial Portfolio Segment [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
TDR beginning balance | 299 | 320
Disbursements (Payments) | (19) | (9)
TDR ending balance | 280 | 311
TDR, Related Allowance |  | 7
Impaired Nonaccrual Loans [Member] | Construction Loans [Member] | Commercial and Residential Real Estate Portfolio Segment [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
TDR beginning balance |  | 2,798
Disbursements (Payments) |  | (1,346)
Charge offs |  | (3)
TDR ending balance |  | 1,449
TDR, Related Allowance |  | 152
Impaired Accruing Restructured Loans [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
TDR beginning balance | 7,501 | 8,663
Disbursements (Payments) | (106) | (698)
Payoffs | (83) | (197)
TDR ending balance | 7,312 | 7,768
TDR, Related Allowance | 204 | 255
Impaired Accruing Restructured Loans [Member] | Residential Portfolio Segment [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
TDR beginning balance | 4,041 | 4,454
Disbursements (Payments) | (53) | (45)
Payoffs | (83) | (197)
TDR ending balance | 3,905 | 4,212
TDR, Related Allowance | 190 | 230
Impaired Accruing Restructured Loans [Member] | Commercial Real Estate Portfolio Segment [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
TDR beginning balance | 3,419 | 4,158
Disbursements (Payments) | (50) | (647)
TDR ending balance | 3,369 | 3,511
TDR, Related Allowance | 14 | 25
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 | 41 | 51
Disbursements (Payments) | (3) | (6)
TDR ending balance | $ 38 | $ 45

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