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Loans and Allowance for Loan Losses - Impaired Loan Portfolio (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2021 | Mar. 31, 2020 | Dec. 31, 2020
Financing Receivable, Impaired [Line Items] |  |  |
Impaired loans with a valuation allowance, Related Allowance | $ 868 |  | $ 546
Total impaired loans, Recorded Investment | 7,226 |  | 7,451
Total impaired loans, Unpaid Principal Balance | 7,334 |  | 7,674
Total impaired loans, Average Recorded Investment | 7,036 | $ 4,681 |
Total impaired loans, Interest Income Recognized | 145 | 22 |
Consumer Real Estate [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired loans without a valuation allowance, Recorded Investment | 1,880 |  | 888
Impaired loans without a valuation allowance, Unpaid Principal Balance | 1,882 |  | 888
All Other Loans [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired loans without a valuation allowance, Recorded Investment | 2,010 |  | 4,759
Impaired loans without a valuation allowance, Unpaid Principal Balance | 2,012 |  | 4,760
Impaired loans with a valuation allowance, Recorded Investment | 3,723 |  | 574
Impaired loans with a valuation allowance, Unpaid Principal Balance | 3,726 |  | 574
Impaired loans with a valuation allowance, Related Allowance | 492 |  | 237
Impaired loans without a valuation allowance, Average Recorded Investment | 3,385 | 1,323 |
Impaired loans without a valuation allowance, Interest Income Recognized | 13 | 7 |
Impaired loans with a valuation allowance, Average Recorded Investment | 2,149 | 1,341 |
Impaired loans with a valuation allowance, Interest Income Recognized | 109 | 13 |
All Other Loans [Member] | Commercial Real Estate [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired loans without a valuation allowance, Recorded Investment | 130 |  | 3,871
Impaired loans without a valuation allowance, Unpaid Principal Balance | 130 |  | 3,872
Impaired loans with a valuation allowance, Recorded Investment | 3,155 |  |
Impaired loans with a valuation allowance, Unpaid Principal Balance | 3,155 |  |
Impaired loans with a valuation allowance, Related Allowance | 251 |  |
Impaired loans without a valuation allowance, Average Recorded Investment | 2,001 | 196 |
Impaired loans without a valuation allowance, Interest Income Recognized | 1 | 3 |
Impaired loans with a valuation allowance, Average Recorded Investment | 1,577 | 198 |
Impaired loans with a valuation allowance, Interest Income Recognized | 102 | 2 |
All Other Loans [Member] | Consumer Real Estate [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired loans with a valuation allowance, Recorded Investment | 459 |  | 428
Impaired loans with a valuation allowance, Unpaid Principal Balance | 462 |  | 428
Impaired loans with a valuation allowance, Related Allowance | 132 |  | 116
Impaired loans without a valuation allowance, Average Recorded Investment | 1,384 | 550 |
Impaired loans without a valuation allowance, Interest Income Recognized | 12 | 4 |
Impaired loans with a valuation allowance, Average Recorded Investment | 444 | 984 |
Impaired loans with a valuation allowance, Interest Income Recognized | 5 | 9 |
All Other Loans [Member] | Construction and Land Development [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired loans without a valuation allowance, Average Recorded Investment |  | 577 |
All Other Loans [Member] | Commercial and Industrial [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired loans with a valuation allowance, Recorded Investment | 109 |  | 146
Impaired loans with a valuation allowance, Unpaid Principal Balance | 109 |  | 146
Impaired loans with a valuation allowance, Related Allowance | 109 |  | 121
Impaired loans with a valuation allowance, Average Recorded Investment | 128 | 159 |
Impaired loans with a valuation allowance, Interest Income Recognized | 2 | 2 |
Purchased Credit Impaired Loans [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired loans with a valuation allowance, Recorded Investment | 1,493 |  | 2,118
Impaired loans with a valuation allowance, Unpaid Principal Balance | 1,596 |  | 2,340
Impaired loans with a valuation allowance, Related Allowance | 376 |  | 309
Impaired loans with a valuation allowance, Average Recorded Investment | 1,502 | 2,017 |
Impaired loans with a valuation allowance, Interest Income Recognized | 23 | 2 |
Purchased Credit Impaired Loans [Member] | Commercial Real Estate [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired loans with a valuation allowance, Average Recorded Investment |  | 964 |
Impaired loans with a valuation allowance, Interest Income Recognized |  | 1 |
Purchased Credit Impaired Loans [Member] | Consumer Real Estate [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired loans with a valuation allowance, Recorded Investment | 1,210 |  | 1,827
Impaired loans with a valuation allowance, Unpaid Principal Balance | 1,347 |  | 2,086
Impaired loans with a valuation allowance, Related Allowance | 158 |  | 88
Impaired loans with a valuation allowance, Average Recorded Investment | 1,215 | 456 |
Impaired loans with a valuation allowance, Interest Income Recognized | 22 | 1 |
Purchased Credit Impaired Loans [Member] | Construction and Land Development [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired loans with a valuation allowance, Average Recorded Investment |  | 231 |
Purchased Credit Impaired Loans [Member] | Commercial and Industrial [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired loans with a valuation allowance, Recorded Investment | 266 |  | 270
Impaired loans with a valuation allowance, Unpaid Principal Balance | 233 |  | 234
Impaired loans with a valuation allowance, Related Allowance | 216 |  | 218
Impaired loans with a valuation allowance, Average Recorded Investment | 268 | 355 |
Impaired loans with a valuation allowance, Interest Income Recognized | 1 |  |
Purchased Credit Impaired Loans [Member] | Consumer and Other [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired loans with a valuation allowance, Recorded Investment | 17 |  | 21
Impaired loans with a valuation allowance, Unpaid Principal Balance | 16 |  | 20
Impaired loans with a valuation allowance, Related Allowance | 2 |  | $ 3
Impaired loans with a valuation allowance, Average Recorded Investment | $ 19 | $ 11 |

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