Loans and Allowance for Loan Losses - Summary of Loans by Major Class (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Loans and Allowance for Loan Losses
Loans held for investment	$ 1,333,923	$ 1,302,133
SBA PPP loans, net	2,300
Commercial, Financial, & Agricultural
Loans and Allowance for Loan Losses
Loans held for investment	221,015	217,214
SBA PPP loans, net	2,300
Residential real estate
Loans and Allowance for Loan Losses
SBA PPP loans, net		8,400
Residential real estate | Construction
Loans and Allowance for Loan Losses
Loans held for investment	21,515	27,920
Residential real estate | Mortgages
Loans and Allowance for Loan Losses
Loans held for investment	287,879	279,346
Commercial real estate | Construction
Loans and Allowance for Loan Losses
Loans held for investment	103,478	91,369
Commercial real estate | Mortgages
Loans and Allowance for Loan Losses
Loans held for investment	677,539	663,256
Installment and Other Consumer
Loans and Allowance for Loan Losses
Loans held for investment	$ 22,497	$ 23,028