Loans and Allowance for Loan Losses - Past Due and Non-accrual Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Aging information for the Company's past due and non-accrual loans
Loans held for investment	$ 1,491,997	$ 1,302,133
90 Days Past Due And Still Accruing	0	14
Non-Accrual	17,348	25,459
Current or Less Than 30 Days Past Due
Aging information for the Company's past due and non-accrual loans
Loans held for investment	1,474,082	1,275,604
30 - 89 Days Past Due
Aging information for the Company's past due and non-accrual loans
Loans held for investment	567	1,056
Commercial, Financial, and Agricultural
Aging information for the Company's past due and non-accrual loans
Loans held for investment	248,913	217,214
90 Days Past Due And Still Accruing	0	0
Non-Accrual	173	153
Commercial, Financial, and Agricultural | Current or Less Than 30 Days Past Due
Aging information for the Company's past due and non-accrual loans
Loans held for investment	248,707	217,058
Commercial, Financial, and Agricultural | 30 - 89 Days Past Due
Aging information for the Company's past due and non-accrual loans
Loans held for investment	33	3
Real estate mortgage - residential | Construction
Aging information for the Company's past due and non-accrual loans
Loans held for investment	25,243	27,920
90 Days Past Due And Still Accruing	0	0
Non-Accrual	0	0
Real estate mortgage - residential | Construction | Current or Less Than 30 Days Past Due
Aging information for the Company's past due and non-accrual loans
Loans held for investment	25,243	27,920
Real estate mortgage - residential | Construction | 30 - 89 Days Past Due
Aging information for the Company's past due and non-accrual loans
Loans held for investment	0	0
Real estate mortgage - residential | Mortgage
Aging information for the Company's past due and non-accrual loans
Loans held for investment	343,661	279,346
90 Days Past Due And Still Accruing	0	14
Non-Accrual	1,083	1,129
Real estate mortgage - residential | Mortgage | Current or Less Than 30 Days Past Due
Aging information for the Company's past due and non-accrual loans
Loans held for investment	342,357	277,532
Real estate mortgage - residential | Mortgage | 30 - 89 Days Past Due
Aging information for the Company's past due and non-accrual loans
Loans held for investment	221	671
Real estate construction − commercial & Real estate mortgage − commercial | Construction
Aging information for the Company's past due and non-accrual loans
Loans held for investment	133,186	91,369
90 Days Past Due And Still Accruing	0	0
Non-Accrual	91	105
Real estate construction − commercial & Real estate mortgage − commercial | Construction | Current or Less Than 30 Days Past Due
Aging information for the Company's past due and non-accrual loans
Loans held for investment	133,095	91,264
Real estate construction − commercial & Real estate mortgage − commercial | Construction | 30 - 89 Days Past Due
Aging information for the Company's past due and non-accrual loans
Loans held for investment	0	0
Real estate construction − commercial & Real estate mortgage − commercial | Mortgage
Aging information for the Company's past due and non-accrual loans
Loans held for investment	717,192	663,256
90 Days Past Due And Still Accruing	0	0
Non-Accrual	15,995	24,029
Real estate construction − commercial & Real estate mortgage − commercial | Mortgage | Current or Less Than 30 Days Past Due
Aging information for the Company's past due and non-accrual loans
Loans held for investment	700,960	638,982
Real estate construction − commercial & Real estate mortgage − commercial | Mortgage | 30 - 89 Days Past Due
Aging information for the Company's past due and non-accrual loans
Loans held for investment	237	245
Installment and Other Consumer
Aging information for the Company's past due and non-accrual loans
Loans held for investment	23,802	23,028
90 Days Past Due And Still Accruing	0	0
Non-Accrual	6	43
Installment and Other Consumer | Current or Less Than 30 Days Past Due
Aging information for the Company's past due and non-accrual loans
Loans held for investment	23,720	22,848
Installment and Other Consumer | 30 - 89 Days Past Due
Aging information for the Company's past due and non-accrual loans
Loans held for investment	$ 76	$ 137