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Loans and Allowance for Loan Losses - Impaired Loan Portfolio (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Dec. 31, 2019
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Impaired loans with a valuation allowance, Related Allowance | $ 465 |  | $ 465 |  | $ 631
Total impaired loans, Recorded Investment | 4,725 |  | 4,725 |  | 4,173
Total impaired loans, Unpaid Principal Balance | 5,230 |  | 5,230 |  | 4,570
Total impaired loans, Average Recorded Investment | 4,797 | $ 5,931 | 4,586 | $ 5,141 |
Total impaired loans, Interest Income Recognized | 60 | 9 | 82 | 42 |
All Other Loans [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Impaired loans without a valuation allowance, Recorded Investment | 1,273 |  | 1,273 |  | 1,356
Impaired loans without a valuation allowance, Unpaid Principal Balance | 1,274 |  | 1,274 |  | 1,361
Impaired loans with a valuation allowance, Recorded Investment | 1,233 |  | 1,233 |  | 1,154
Impaired loans with a valuation allowance, Unpaid Principal Balance | 1,239 |  | 1,239 |  | 1,154
Impaired loans with a valuation allowance, Related Allowance | 465 |  | 465 |  | 475
Impaired loans without a valuation allowance, Average Recorded Investment | 1,282 | 1,728 | 1,306 | 1,937 |
Impaired loans without a valuation allowance, Interest Income Recognized | 11 | 7 | 18 | 31 |
Impaired loans with a valuation allowance, Average Recorded Investment | 1,381 | 575 | 1,304 | 786 |
Impaired loans with a valuation allowance, Interest Income Recognized | 8 | 2 | 21 | 18 |
All Other Loans [Member] | Commercial Real Estate [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Impaired loans without a valuation allowance, Recorded Investment | 553 |  | 553 |  | 256
Impaired loans without a valuation allowance, Unpaid Principal Balance | 553 |  | 553 |  | 261
Impaired loans with a valuation allowance, Recorded Investment | 396 |  | 396 |  | 0
Impaired loans with a valuation allowance, Unpaid Principal Balance | 402 |  | 402 |  | 0
Impaired loans with a valuation allowance, Related Allowance | 44 |  | 44 |  | 0
Impaired loans without a valuation allowance, Average Recorded Investment | 345 | 424 | 315 | 495 |
Impaired loans without a valuation allowance, Interest Income Recognized | 1 | 5 | 4 | 25 |
Impaired loans with a valuation allowance, Average Recorded Investment | 396 | 24 | 264 | 16 |
Impaired loans with a valuation allowance, Interest Income Recognized | 0 | 0 | 2 | 0 |
All Other Loans [Member] | Consumer Real Estate [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Impaired loans without a valuation allowance, Recorded Investment | 720 |  | 720 |  | 553
Impaired loans without a valuation allowance, Unpaid Principal Balance | 721 |  | 721 |  | 553
Impaired loans with a valuation allowance, Recorded Investment | 680 |  | 680 |  | 994
Impaired loans with a valuation allowance, Unpaid Principal Balance | 680 |  | 680 |  | 994
Impaired loans with a valuation allowance, Related Allowance | 292 |  | 292 |  | 343
Impaired loans without a valuation allowance, Average Recorded Investment | 633 | 624 | 606 | 774 |
Impaired loans without a valuation allowance, Interest Income Recognized | 10 | 0 | 14 | 4 |
Impaired loans with a valuation allowance, Average Recorded Investment | 827 | 217 | 882 | 199 |
Impaired loans with a valuation allowance, Interest Income Recognized | 5 | 2 | 14 | 9 |
All Other Loans [Member] | Construction and Land Development [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Impaired loans without a valuation allowance, Recorded Investment | 0 |  | 0 |  | 547
Impaired loans without a valuation allowance, Unpaid Principal Balance | 0 |  | 0 |  | 547
Impaired loans with a valuation allowance, Recorded Investment | 0 |  | 0 |  | 0
Impaired loans with a valuation allowance, Unpaid Principal Balance | 0 |  | 0 |  | 0
Impaired loans with a valuation allowance, Related Allowance | 0 |  | 0 |  | 0
Impaired loans without a valuation allowance, Average Recorded Investment | 304 | 650 | 385 | 616 |
Impaired loans without a valuation allowance, Interest Income Recognized | 0 | 2 | 0 | 1 |
Impaired loans with a valuation allowance, Average Recorded Investment | 0 | 28 | 0 | 19 |
Impaired loans with a valuation allowance, Interest Income Recognized | 0 | 0 | 0 | 0 |
All Other Loans [Member] | Commercial and Industrial [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Impaired loans without a valuation allowance, Recorded Investment | 0 |  | 0 |  | 0
Impaired loans without a valuation allowance, Unpaid Principal Balance | 0 |  | 0 |  | 0
Impaired loans with a valuation allowance, Recorded Investment | 157 |  | 157 |  | 160
Impaired loans with a valuation allowance, Unpaid Principal Balance | 157 |  | 157 |  | 160
Impaired loans with a valuation allowance, Related Allowance | 129 |  | 129 |  | 132
Impaired loans without a valuation allowance, Average Recorded Investment | 0 | 16 | 0 | 33 |
Impaired loans without a valuation allowance, Interest Income Recognized | 0 | 0 | 0 | 1 |
Impaired loans with a valuation allowance, Average Recorded Investment | 158 | 293 | 158 | 514 |
Impaired loans with a valuation allowance, Interest Income Recognized | 3 | 0 | 5 | 9 |
All Other Loans [Member] | Consumer and Other [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Impaired loans without a valuation allowance, Recorded Investment | 0 |  | 0 |  | 0
Impaired loans without a valuation allowance, Unpaid Principal Balance | 0 |  | 0 |  | 0
Impaired loans with a valuation allowance, Recorded Investment | 0 |  | 0 |  | 0
Impaired loans with a valuation allowance, Unpaid Principal Balance | 0 |  | 0 |  | 0
Impaired loans with a valuation allowance, Related Allowance | 0 |  | 0 |  | 0
Impaired loans without a valuation allowance, Average Recorded Investment | 0 | 14 | 0 | 19 |
Impaired loans without a valuation allowance, Interest Income Recognized | 0 | 0 | 0 | 0 |
Impaired loans with a valuation allowance, Average Recorded Investment | 0 | 13 | 0 | 38 |
Impaired loans with a valuation allowance, Interest Income Recognized | 0 | 0 | 0 | 0 |
Purchased Credit Impaired Loans [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Impaired loans with a valuation allowance, Recorded Investment | 2,219 |  | 2,219 |  | 1,663
Impaired loans with a valuation allowance, Unpaid Principal Balance | 2,717 |  | 2,717 |  | 2,055
Impaired loans with a valuation allowance, Related Allowance | 0 |  | 0 |  | 156
Impaired loans with a valuation allowance, Average Recorded Investment | 2,134 | 3,628 | 1,976 | 2,418 |
Impaired loans with a valuation allowance, Interest Income Recognized | 41 | 0 | 43 |  |
Impaired loans with a valuation allowance, Interest Income (Expense) Recognized |  |  |  | (7) |
Purchased Credit Impaired Loans [Member] | Commercial Real Estate [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Impaired loans with a valuation allowance, Recorded Investment | 16 |  | 16 |  | 17
Impaired loans with a valuation allowance, Unpaid Principal Balance | 99 |  | 99 |  | 99
Impaired loans with a valuation allowance, Related Allowance | 0 |  | 0 |  | 17
Impaired loans with a valuation allowance, Average Recorded Investment | 490 | 2,529 | 333 | 1,686 |
Impaired loans with a valuation allowance, Interest Income Recognized | 0 | 0 | 1 |  |
Impaired loans with a valuation allowance, Interest Income (Expense) Recognized |  |  |  | (9) |
Purchased Credit Impaired Loans [Member] | Consumer Real Estate [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Impaired loans with a valuation allowance, Recorded Investment | 1,870 |  | 1,870 |  | 1,205
Impaired loans with a valuation allowance, Unpaid Principal Balance | 2,138 |  | 2,138 |  | 1,371
Impaired loans with a valuation allowance, Related Allowance | 0 |  | 0 |  | 74
Impaired loans with a valuation allowance, Average Recorded Investment | 1,168 | 1,099 | 1,174 | 732 |
Impaired loans with a valuation allowance, Interest Income Recognized | 38 | 0 | 39 | 2 |
Purchased Credit Impaired Loans [Member] | Construction and Land Development [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Impaired loans with a valuation allowance, Recorded Investment | 0 |  | 0 |  | 0
Impaired loans with a valuation allowance, Unpaid Principal Balance | 0 |  | 0 |  | 0
Impaired loans with a valuation allowance, Related Allowance | 0 |  | 0 |  | 0
Impaired loans with a valuation allowance, Average Recorded Investment | 116 | 0 | 77 | 0 |
Impaired loans with a valuation allowance, Interest Income Recognized | 0 | 0 | 0 | 0 |
Purchased Credit Impaired Loans [Member] | Commercial and Industrial [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Impaired loans with a valuation allowance, Recorded Investment | 303 |  | 303 |  | 396
Impaired loans with a valuation allowance, Unpaid Principal Balance | 445 |  | 445 |  | 534
Impaired loans with a valuation allowance, Related Allowance | 0 |  | 0 |  | 59
Impaired loans with a valuation allowance, Average Recorded Investment | 338 | 0 | 361 | 0 |
Impaired loans with a valuation allowance, Interest Income Recognized | 3 | 0 | 3 | 0 |
Purchased Credit Impaired Loans [Member] | Consumer and Other [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Impaired loans with a valuation allowance, Recorded Investment | 30 |  | 30 |  | 45
Impaired loans with a valuation allowance, Unpaid Principal Balance | 35 |  | 35 |  | 51
Impaired loans with a valuation allowance, Related Allowance | 0 |  | 0 |  | $ 6
Impaired loans with a valuation allowance, Average Recorded Investment | 22 | 0 | 31 | 0 |
Impaired loans with a valuation allowance, Interest Income Recognized | $ 0 | $ 0 | $ 0 | $ 0 |

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