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Loans and Allowance for Loan Losses - Impairment Methodology (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | --- | --- | ---
Allowance for loan losses: |  |  |  |
Individually evaluated for impairment | $ 615 | $ 1,194 |  |
Collectively evaluated for impairment | 11,862 | 10,458 |  |
Total | 12,477 | 11,652 | $ 10,852 | $ 9,886
Loans outstanding: |  |  |  |
Individually evaluated for impairment | 7,395 | 8,478 |  |
Collectively evaluated for impairment | 1,161,830 | 1,138,149 |  |
Total | 1,169,225 | 1,146,627 |  |
Commercial, financial, and agricultural |  |  |  |
Allowance for loan losses: |  |  |  |
Individually evaluated for impairment | 311 | 551 |  |
Collectively evaluated for impairment | 2,607 | 2,686 |  |
Total | 2,918 | 3,237 | 3,325 | 2,753
Loans outstanding: |  |  |  |
Individually evaluated for impairment | 1,514 | 2,428 |  |
Collectively evaluated for impairment | 197,508 | 205,292 |  |
Total | 199,022 | 207,720 |  |
Residential real estate | Construction |  |  |  |
Allowance for loan losses: |  |  |  |
Individually evaluated for impairment | 0 | 0 |  |
Collectively evaluated for impairment | 64 | 140 |  |
Total | 64 | 140 | 170 | 108
Loans outstanding: |  |  |  |
Individually evaluated for impairment | 0 | 0 |  |
Collectively evaluated for impairment | 23,035 | 28,610 |  |
Total | 23,035 | 28,610 |  |
Residential real estate | Mortgages |  |  |  |
Allowance for loan losses: |  |  |  |
Individually evaluated for impairment | 264 | 579 |  |
Collectively evaluated for impairment | 1,854 | 1,492 |  |
Total | 2,118 | 2,071 | 1,689 | 2,385
Loans outstanding: |  |  |  |
Individually evaluated for impairment | 3,856 | 4,793 |  |
Collectively evaluated for impairment | 249,215 | 236,724 |  |
Total | 253,071 | 241,517 |  |
Commercial real estate | Construction |  |  |  |
Allowance for loan losses: |  |  |  |
Individually evaluated for impairment | 0 | 0 |  |
Collectively evaluated for impairment | 369 | 757 |  |
Total | 369 | 757 | 807 | 413
Loans outstanding: |  |  |  |
Individually evaluated for impairment | 137 | 153 |  |
Collectively evaluated for impairment | 84,861 | 106,631 |  |
Total | 84,998 | 106,784 |  |
Commercial real estate | Mortgages |  |  |  |
Allowance for loan losses: |  |  |  |
Individually evaluated for impairment | 23 | 37 |  |
Collectively evaluated for impairment | 6,524 | 4,877 |  |
Total | 6,547 | 4,914 | 4,437 | 3,793
Loans outstanding: |  |  |  |
Individually evaluated for impairment | 1,711 | 850 |  |
Collectively evaluated for impairment | 574,924 | 528,686 |  |
Total | 576,635 | 529,536 |  |
Installment and other consumer |  |  |  |
Allowance for loan losses: |  |  |  |
Individually evaluated for impairment | 17 | 27 |  |
Collectively evaluated for impairment | 364 | 307 |  |
Total | 381 | 334 | 345 | 274
Loans outstanding: |  |  |  |
Individually evaluated for impairment | 177 | 254 |  |
Collectively evaluated for impairment | 32,287 | 32,206 |  |
Total | 32,464 | 32,460 |  |
Unallocated |  |  |  |
Allowance for loan losses: |  |  |  |
Individually evaluated for impairment | 0 | 0 |  |
Collectively evaluated for impairment | 80 | 199 |  |
Total | 80 | 199 | $ 79 | $ 160
Loans outstanding: |  |  |  |
Individually evaluated for impairment | 0 | 0 |  |
Collectively evaluated for impairment | 0 | 0 |  |
Total | $ 0 | $ 0 |  |

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