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Loans and Allowance for Loan Losses - Summary of Loans by Major Class (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
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Loans and Allowance for Loan Losses |  |
Total loans | $ 1,169,225 | $ 1,146,627
Commercial, financial, and agricultural |  |
Loans and Allowance for Loan Losses |  |
Total loans | 199,022 | 207,720
Residential real estate | Construction |  |
Loans and Allowance for Loan Losses |  |
Total loans | 23,035 | 28,610
Residential real estate | Mortgages |  |
Loans and Allowance for Loan Losses |  |
Total loans | 253,071 | 241,517
Commercial real estate | Construction |  |
Loans and Allowance for Loan Losses |  |
Total loans | 84,998 | 106,784
Commercial real estate | Mortgages |  |
Loans and Allowance for Loan Losses |  |
Total loans | 576,635 | 529,536
Installment and other consumer |  |
Loans and Allowance for Loan Losses |  |
Total loans | $ 32,464 | $ 32,460

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- Definition Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=118952595&loc=d3e4428-111522 + Details
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