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Loans and Allowance for Credit Losses (Rollforward of TDRs) (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
TDR beginning balance | $ 9,193 | $ 11,781
New TDRs | 1,506 |
Disbursements (Payments) | (437) | (676)
Payoffs |  | (197)
TDR ending balance | 10,262 | 10,908
TDR, Related Allowance | 286 | 492
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) | (380) | (38)
TDR ending balance | 2,818 | 3,080
TDR, Related Allowance | 94 | 291
Impaired Nonaccrual Loans [Member] | Residential Portfolio Segment [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
TDR beginning balance | 1,393 |
Disbursements (Payments) | (26) |
TDR ending balance | 1,367 |
TDR, Related Allowance | 94 |
Impaired Nonaccrual Loans [Member] | Commercial Real Estate Portfolio Segment [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
New TDRs | 1,506 |
Disbursements (Payments) | (344) |
TDR ending balance | 1,162 |
Impaired Nonaccrual Loans [Member] | Commercial Portfolio Segment [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
TDR beginning balance | 299 | 320
Disbursements (Payments) | (10) | (5)
TDR ending balance | 289 | 315
TDR, Related Allowance |  | 12
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) |  | (33)
TDR ending balance |  | 2,765
TDR, Related Allowance |  | 279
Impaired Accruing Restructured Loans [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
TDR beginning balance | 7,501 | 8,663
Disbursements (Payments) | (57) | (638)
Payoffs |  | (197)
TDR ending balance | 7,444 | 7,828
TDR, Related Allowance | 192 | 201
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) | (28) | (23)
Payoffs |  | (197)
TDR ending balance | 4,013 | 4,234
TDR, Related Allowance | 174 | 174
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) | (26) | (613)
TDR ending balance | 3,393 | 3,545
TDR, Related Allowance | 18 | 27
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) | (2)
TDR ending balance | $ 38 | $ 49

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