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Loans and Allowance for Loan Losses - Impairment Methodology (Details) - USD ($) $ in Thousands | Mar. 31, 2019 | Dec. 31, 2018 | Mar. 31, 2018 | Dec. 31, 2017
--- | --- | --- | --- | ---
Allowance for loan losses: |  |  |  |
Individually evaluated for impairment | $ 1,039 | $ 1,194 |  |
Collectively evaluated for impairment | 10,806 | 10,458 |  |
Total | 11,845 | 11,652 | $ 10,947 | $ 10,852
Loans outstanding: |  |  |  |
Individually evaluated for impairment | 8,523 | 8,478 |  |
Collectively evaluated for impairment | 1,146,129 | 1,138,149 |  |
Total | 1,154,652 | 1,146,627 |  |
Commercial, financial, and agricultural |  |  |  |
Allowance for loan losses: |  |  |  |
Individually evaluated for impairment | 512 | 551 |  |
Collectively evaluated for impairment | 2,720 | 2,686 |  |
Total | 3,232 | 3,237 | 3,261 | 3,325
Loans outstanding: |  |  |  |
Individually evaluated for impairment | 2,376 | 2,428 |  |
Collectively evaluated for impairment | 202,383 | 205,292 |  |
Total | 204,759 | 207,720 |  |
Residential real estate | Construction |  |  |  |
Allowance for loan losses: |  |  |  |
Individually evaluated for impairment | 0 | 0 |  |
Collectively evaluated for impairment | 74 | 140 |  |
Total | 74 | 140 | 240 | 170
Loans outstanding: |  |  |  |
Individually evaluated for impairment | 0 | 0 |  |
Collectively evaluated for impairment | 26,082 | 28,610 |  |
Total | 26,082 | 28,610 |  |
Residential real estate | Mortgages |  |  |  |
Allowance for loan losses: |  |  |  |
Individually evaluated for impairment | 475 | 579 |  |
Collectively evaluated for impairment | 1,415 | 1,492 |  |
Total | 1,890 | 2,071 | 2,057 | 1,689
Loans outstanding: |  |  |  |
Individually evaluated for impairment | 4,851 | 4,793 |  |
Collectively evaluated for impairment | 243,208 | 236,724 |  |
Total | 248,059 | 241,517 |  |
Commercial real estate | Construction |  |  |  |
Allowance for loan losses: |  |  |  |
Individually evaluated for impairment | 0 | 0 |  |
Collectively evaluated for impairment | 638 | 757 |  |
Total | 638 | 757 | 895 | 807
Loans outstanding: |  |  |  |
Individually evaluated for impairment | 151 | 153 |  |
Collectively evaluated for impairment | 109,615 | 106,631 |  |
Total | 109,766 | 106,784 |  |
Commercial real estate | Mortgages |  |  |  |
Allowance for loan losses: |  |  |  |
Individually evaluated for impairment | 25 | 37 |  |
Collectively evaluated for impairment | 5,498 | 4,877 |  |
Total | 5,523 | 4,914 | 4,008 | 4,437
Loans outstanding: |  |  |  |
Individually evaluated for impairment | 881 | 850 |  |
Collectively evaluated for impairment | 533,240 | 528,686 |  |
Total | 534,121 | 529,536 |  |
Installment and other consumer |  |  |  |
Allowance for loan losses: |  |  |  |
Individually evaluated for impairment | 27 | 27 |  |
Collectively evaluated for impairment | 306 | 307 |  |
Total | 333 | 334 | 352 | 345
Loans outstanding: |  |  |  |
Individually evaluated for impairment | 264 | 254 |  |
Collectively evaluated for impairment | 31,601 | 32,206 |  |
Total | 31,865 | 32,460 |  |
Unallocated |  |  |  |
Allowance for loan losses: |  |  |  |
Individually evaluated for impairment | 0 | 0 |  |
Collectively evaluated for impairment | 155 | 199 |  |
Total | 155 | 199 | $ 134 | $ 79
Loans outstanding: |  |  |  |
Individually evaluated for impairment | 0 | 0 |  |
Collectively evaluated for impairment | 0 | 0 |  |
Total | $ 0 | $ 0 |  |

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