Loans and Allowance for Credit Losses - Past Due and Non-accrual Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Aging information for the Company's past due and non-accrual loans
Loans held for investment	$ 1,518,853	$ 1,539,147
90 Days Past Due And Still Accruing	586	119
Non-Accrual	7,963	6,294
Current or Less Than 30 Days Past Due
Aging information for the Company's past due and non-accrual loans
Loans held for investment	1,506,782	1,529,232
30 - 89 Days Past Due
Aging information for the Company's past due and non-accrual loans
Loans held for investment	3,522	3,502
Commercial, Financial, and Agricultural
Aging information for the Company's past due and non-accrual loans
Loans held for investment	218,018	226,275
90 Days Past Due And Still Accruing	0	0
Non-Accrual	2,423	2,228
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	214,547	223,845
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	1,048	202
Real estate construction − residential
Aging information for the Company's past due and non-accrual loans
Loans held for investment	47,088	58,347
90 Days Past Due And Still Accruing	0	0
Non-Accrual	456	432
Real estate construction − residential | Current or Less Than 30 Days Past Due
Aging information for the Company's past due and non-accrual loans
Loans held for investment	46,426	57,568
Real estate construction − residential | 30 - 89 Days Past Due
Aging information for the Company's past due and non-accrual loans
Loans held for investment	206	347
Real estate construction − commercial
Aging information for the Company's past due and non-accrual loans
Loans held for investment	52,781	130,296
90 Days Past Due And Still Accruing	0	0
Non-Accrual	64	69
Real estate construction − commercial | Current or Less Than 30 Days Past Due
Aging information for the Company's past due and non-accrual loans
Loans held for investment	52,717	130,227
Real estate construction − commercial | 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
Aging information for the Company's past due and non-accrual loans
Loans held for investment	375,118	372,391
90 Days Past Due And Still Accruing	573	115
Non-Accrual	525	587
Real estate mortgage − residential | Current or Less Than 30 Days Past Due
Aging information for the Company's past due and non-accrual loans
Loans held for investment	372,649	368,956
Real estate mortgage − residential | 30 - 89 Days Past Due
Aging information for the Company's past due and non-accrual loans
Loans held for investment	1,371	2,733
Real estate mortgage − commercial
Aging information for the Company's past due and non-accrual loans
Loans held for investment	807,703	731,024
90 Days Past Due And Still Accruing	0	0
Non-Accrual	4,491	2,978
Real estate mortgage − commercial | Current or Less Than 30 Days Past Due
Aging information for the Company's past due and non-accrual loans
Loans held for investment	802,455	728,029
Real estate mortgage − commercial | 30 - 89 Days Past Due
Aging information for the Company's past due and non-accrual loans
Loans held for investment	757	17
Installment and Other Consumer
Aging information for the Company's past due and non-accrual loans
Loans held for investment	18,145	20,814
90 Days Past Due And Still Accruing	13	4
Non-Accrual	4	0
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	17,988	20,607
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	$ 140	$ 203