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Loans and Allowance for Loan Losses, Impaired Loans (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
With an allowance recorded [Abstract] |  |  |
Unpaid principal balance | $ 0 |  |
Recorded investment | 0 | $ 7,010 |
Total [Abstract] |  |  |
Unpaid principal balance | 11,076 | 17,135 | $ 14,376
Recorded investment | 11,026 | 17,135 | 12,618
Allowance for Loan Losses Allocated | 0 | 807 | 98
Impaired loans [Abstract] |  |  |
Average impaired loans - with an allowance recorded | 0 |  |
Interest income recognized - with an allowance recorded | 0 |  |
Cash basis interest recognized - with an allowance recorded | 0 |  |
Average impaired loans | 8,276 | 15,153 | 11,067
Interest income recognized | 510 | 1,268 | 748
Cash basis interest recognized | 510 | 1,268 | 748
Residential Real Estate [Member] |  |  |
With no related allowance recorded [Abstract] |  |  |
Unpaid principal balance | 418 | 438 | 1,667
Recorded investment | 411 | 438 | 1,667
Impaired loans [Abstract] |  |  |
Average impaired loans - with no allowance recorded | 423 | 453 | 511
Interest income recognized - with no allowance recorded | 21 | 23 | 101
Cash basis interest recognized - with no allowance recorded | 21 | 23 | 101
Commercial Real Estate [Member] | Owner-occupied [Member] |  |  |
With an allowance recorded [Abstract] |  |  |
Unpaid principal balance |  | 2,030 |
Recorded investment |  | 2,030 |
With no related allowance recorded [Abstract] |  |  |
Unpaid principal balance | 5,256 | 1,778 | 2,527
Recorded investment | 5,256 | 1,778 | 2,527
Total [Abstract] |  |  |
Allowance for Loan Losses Allocated |  | 385 |
Impaired loans [Abstract] |  |  |
Average impaired loans - with an allowance recorded |  | 1,375 |
Interest income recognized - with an allowance recorded |  | 197 |
Cash basis interest recognized - with an allowance recorded |  | 197 |
Average impaired loans - with no allowance recorded | 3,417 | 1,902 | 2,475
Interest income recognized - with no allowance recorded | 260 | 113 | 141
Cash basis interest recognized - with no allowance recorded | 260 | 113 | 141
Commercial Real Estate [Member] | Nonowner-occupied [Member] |  |  |
With an allowance recorded [Abstract] |  |  |
Unpaid principal balance |  |  | 362
Recorded investment |  |  | 362
With no related allowance recorded [Abstract] |  |  |
Unpaid principal balance | 632 | 7,492 | 2,368
Recorded investment | 589 | 7,492 | 946
Total [Abstract] |  |  |
Allowance for Loan Losses Allocated |  |  | 98
Impaired loans [Abstract] |  |  |
Average impaired loans - with an allowance recorded |  |  | 367
Interest income recognized - with an allowance recorded |  |  | 15
Cash basis interest recognized - with an allowance recorded |  |  | 15
Average impaired loans - with no allowance recorded | 626 | 6,160 | 1,912
Interest income recognized - with no allowance recorded | 29 | 477 | 57
Cash basis interest recognized - with no allowance recorded | 29 | 477 | 57
Commercial Real Estate [Member] | Construction [Member] |  |  |
With no related allowance recorded [Abstract] |  |  |
Unpaid principal balance |  |  | 336
Recorded investment |  |  | 0
Impaired loans [Abstract] |  |  |
Average impaired loans - with no allowance recorded |  |  | 0
Interest income recognized - with no allowance recorded |  |  | 20
Cash basis interest recognized - with no allowance recorded |  |  | 20
Commercial and Industrial [Member] |  |  |
With an allowance recorded [Abstract] |  |  |
Unpaid principal balance |  | 4,861 |
Recorded investment |  | 4,861 |
With no related allowance recorded [Abstract] |  |  |
Unpaid principal balance | 4,686 | 49 | 7,116
Recorded investment | 4,686 | 49 | 7,116
Total [Abstract] |  |  |
Allowance for Loan Losses Allocated |  | 303 |
Impaired loans [Abstract] |  |  |
Average impaired loans - with an allowance recorded |  | 4,796 |
Interest income recognized - with an allowance recorded |  | 319 |
Cash basis interest recognized - with an allowance recorded |  | 319 |
Average impaired loans - with no allowance recorded | 3,772 | 300 | 5,802
Interest income recognized - with no allowance recorded | 196 | 111 | 414
Cash basis interest recognized - with no allowance recorded | 196 | 111 | $ 414
Consumer [Member] | Home Equity [Member] |  |  |
With no related allowance recorded [Abstract] |  |  |
Unpaid principal balance | 34 | 368 |
Recorded investment | 34 | 368 |
Impaired loans [Abstract] |  |  |
Average impaired loans - with no allowance recorded | 28 | 143 |
Interest income recognized - with no allowance recorded | 2 | 19 |
Cash basis interest recognized - with no allowance recorded | 2 | 19 |
Consumer [Member] | Automobile [Member] |  |  |
With an allowance recorded [Abstract] |  |  |
Unpaid principal balance |  | 8 |
Recorded investment |  | 8 |
Total [Abstract] |  |  |
Allowance for Loan Losses Allocated |  | 8 |
Impaired loans [Abstract] |  |  |
Average impaired loans - with an allowance recorded |  | 2 |
Interest income recognized - with an allowance recorded |  | 0 |
Cash basis interest recognized - with an allowance recorded |  | 0 |
Consumer [Member] | Other [Member] |  |  |
With an allowance recorded [Abstract] |  |  |
Unpaid principal balance |  | 111 |
Recorded investment |  | 111 |
With no related allowance recorded [Abstract] |  |  |
Unpaid principal balance | 50 |  |
Recorded investment | 50 |  |
Total [Abstract] |  |  |
Allowance for Loan Losses Allocated |  | 111 |
Impaired loans [Abstract] |  |  |
Average impaired loans - with an allowance recorded |  | 22 |
Interest income recognized - with an allowance recorded |  | 9 |
Cash basis interest recognized - with an allowance recorded |  | $ 9 |
Average impaired loans - with no allowance recorded | 10 |  |
Interest income recognized - with no allowance recorded | 2 |  |
Cash basis interest recognized - with no allowance recorded | $ 2 |  |

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