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Loans and Allowance for Loan Losses - Summary of Loans by Major Class (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
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Loans and Allowance for Loan Losses |  |
Total loans held for investment | $ 1,276,185 | $ 1,286,967
SBA PPA loans, net | 56,300 |
Commercial, financial, and agricultural |  |
Loans and Allowance for Loan Losses |  |
Total loans held for investment | 251,943 | 272,918
SBA PPA loans, net | 56,300 | 63,300
Residential real estate | Construction |  |
Loans and Allowance for Loan Losses |  |
Total loans held for investment | 33,962 | 29,692
Residential real estate | Mortgages |  |
Loans and Allowance for Loan Losses |  |
Total loans held for investment | 258,259 | 262,339
Commercial real estate | Construction |  |
Loans and Allowance for Loan Losses |  |
Total loans held for investment | 78,576 | 78,144
Commercial real estate | Mortgages |  |
Loans and Allowance for Loan Losses |  |
Total loans held for investment | 628,178 | 617,133
Installment and other consumer |  |
Loans and Allowance for Loan Losses |  |
Total loans held for investment | $ 25,267 | $ 26,741

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