Loans and Allowance for Credit Losses - Past Due and Non-accrual Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Aging information for the Company's past due and non-accrual loans
Loans held for investment	$ 1,563,206	$ 1,521,252
90 Days Past Due And Still Accruing	7	1
Non-Accrual	3,840	18,700
Current or Less Than 30 Days Past Due
Aging information for the Company's past due and non-accrual loans
Loans held for investment	1,557,694	1,501,738
30 - 89 Days Past Due
Aging information for the Company's past due and non-accrual loans
Loans held for investment	1,665	813
Commercial, Financial, and Agricultural
Aging information for the Company's past due and non-accrual loans
Loans held for investment	233,029	244,549
90 Days Past Due And Still Accruing	0	0
Non-Accrual	162	121
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	232,864	244,392
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	3	36
Real estate construction − residential
Aging information for the Company's past due and non-accrual loans
Loans held for investment	51,884	32,095
90 Days Past Due And Still Accruing	0	0
Non-Accrual	94	0
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	51,790	32,095
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	0	0
Real estate construction − commercial
Aging information for the Company's past due and non-accrual loans
Loans held for investment	127,761	137,235
90 Days Past Due And Still Accruing	0	0
Non-Accrual	78	87
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	127,683	137,148
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	383,439	361,025
90 Days Past Due And Still Accruing	0	0
Non-Accrual	724	685
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	381,782	359,672
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	933	668
Real estate mortgage − commercial
Aging information for the Company's past due and non-accrual loans
Loans held for investment	744,771	722,729
90 Days Past Due And Still Accruing	0	0
Non-Accrual	2,780	17,801
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	741,402	704,925
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	589	3
Installment and Other Consumer
Aging information for the Company's past due and non-accrual loans
Loans held for investment	22,322	23,619
90 Days Past Due And Still Accruing	7	1
Non-Accrual	2	6
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	22,173	23,506
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	$ 106