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Loans and Allowance for Credit Losses (Impaired Financing Receivables by Loan Class) (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2021 | Mar. 31, 2020 | Dec. 31, 2020
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Unpaid principal balance | $ 13,759 |  | $ 14,480
Recorded investment with no allowance | 11,393 |  | 11,322
Recorded investment with an allowance | 1,131 |  | 1,934
Related allowance | 95 |  | 213
Quarter-to-date average recorded investment | 13,040 | $ 18,172 |
Interest income recognized | 69 | 63 |
Impaired Nonaccrual Loans [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Unpaid principal balance | 6,115 |  | 6,679
Recorded investment with no allowance | 4,880 |  | 5,388
Recorded investment with an allowance |  |  | 67
Related allowance |  |  | 67
Quarter-to-date average recorded investment | 4,999 | 10,704 |
Impaired Accruing Restructured Loans [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Unpaid principal balance | 6,456 |  | 6,997
Recorded investment with no allowance | 5,325 |  | 5,130
Recorded investment with an allowance | 1,131 |  | 1,867
Related allowance | 95 |  | 146
Quarter-to-date average recorded investment | 6,628 | 7,468 |
Interest income recognized | 63 | 63 |
Other Impaired Accruing Loans [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Unpaid principal balance | 1,188 |  | 804
Recorded investment with no allowance | 1,188 |  | 804
Quarter-to-date average recorded investment | 1,413 |  |
Interest income recognized | 6 |  |
Residential Portfolio Segment [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Unpaid principal balance | 5,368 |  | 5,802
Recorded investment with no allowance | 4,150 |  | 4,494
Recorded investment with an allowance | 1,131 |  | 1,228
Related allowance | 95 |  | 135
Quarter-to-date average recorded investment | 5,794 | 6,894 |
Interest income recognized | 45 | 38 |
Residential Portfolio Segment [Member] | Impaired Nonaccrual Loans [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Unpaid principal balance | 1,309 |  | 1,665
Recorded investment with no allowance | 1,222 |  | 1,585
Quarter-to-date average recorded investment | 1,411 | 2,871 |
Residential Portfolio Segment [Member] | Impaired Accruing Restructured Loans [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Unpaid principal balance | 3,381 |  | 3,845
Recorded investment with no allowance | 2,250 |  | 2,617
Recorded investment with an allowance | 1,131 |  | 1,228
Related allowance | 95 |  | 135
Quarter-to-date average recorded investment | 3,530 | 4,023 |
Interest income recognized | 40 | 38 |
Residential Portfolio Segment [Member] | Other Impaired Accruing Loans [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Unpaid principal balance | 678 |  | 292
Recorded investment with no allowance | 678 |  | 292
Quarter-to-date average recorded investment | 853 |  |
Interest income recognized | 5 |  |
Commercial Real Estate Portfolio Segment [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Unpaid principal balance | 7,638 |  | 7,918
Recorded investment with no allowance | 6,638 |  | 6,211
Recorded investment with an allowance |  |  | 706
Related allowance |  |  | 78
Quarter-to-date average recorded investment | 6,587 | 10,758 |
Interest income recognized | 24 | 24 |
Commercial Real Estate Portfolio Segment [Member] | Impaired Nonaccrual Loans [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Unpaid principal balance | 4,085 |  | 4,288
Recorded investment with no allowance | 3,085 |  | 3,220
Recorded investment with an allowance |  |  | 67
Related allowance |  |  | 67
Quarter-to-date average recorded investment | 3,012 | 7,352 |
Commercial Real Estate Portfolio Segment [Member] | Impaired Accruing Restructured Loans [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Unpaid principal balance | 3,043 |  | 3,118
Recorded investment with no allowance | 3,043 |  | 2,479
Recorded investment with an allowance |  |  | 639
Related allowance |  |  | 11
Quarter-to-date average recorded investment | 3,065 | 3,406 |
Interest income recognized | 23 | 24 |
Commercial Real Estate Portfolio Segment [Member] | Other Impaired Accruing Loans [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Unpaid principal balance | 510 |  | 512
Recorded investment with no allowance | 510 |  | 512
Quarter-to-date average recorded investment | 510 |  |
Interest income recognized | 1 |  |
Commercial Portfolio Segment [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Unpaid principal balance | 396 |  | 401
Recorded investment with no allowance | 248 |  | 258
Quarter-to-date average recorded investment | 301 | 382 |
Commercial Portfolio Segment [Member] | Impaired Nonaccrual Loans [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Unpaid principal balance | 396 |  | 401
Recorded investment with no allowance | 248 |  | 258
Quarter-to-date average recorded investment | 251 | 382 |
Commercial Portfolio Segment [Member] | Other Impaired Accruing Loans [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Quarter-to-date average recorded investment | 50 |  |
Consumer Portfolio Segment [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Unpaid principal balance | 28 |  | 28
Recorded investment with no allowance | 28 |  | 28
Quarter-to-date average recorded investment | 28 |  |
Consumer Portfolio Segment [Member] | Impaired Nonaccrual Loans [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Unpaid principal balance | 28 |  | 28
Recorded investment with no allowance | 28 |  | 28
Quarter-to-date average recorded investment | 28 |  |
Construction Loans [Member] | Commercial and Residential Real Estate Portfolio Segment [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Unpaid principal balance | 329 |  | 331
Recorded investment with no allowance | 329 |  | 331
Quarter-to-date average recorded investment | 330 | 138 |
Interest income recognized |  | 1 |
Construction Loans [Member] | Commercial and Residential Real Estate Portfolio Segment [Member] | Impaired Nonaccrual Loans [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Unpaid principal balance | 297 |  | 297
Recorded investment with no allowance | 297 |  | 297
Quarter-to-date average recorded investment | 297 | 99 |
Construction Loans [Member] | Commercial and Residential Real Estate Portfolio Segment [Member] | Impaired Accruing Restructured Loans [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Unpaid principal balance | 32 |  | 34
Recorded investment with no allowance | 32 |  | $ 34
Quarter-to-date average recorded investment | $ 33 | 39 |
Interest income recognized |  | $ 1 |

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