Loans and Allowance for Credit Losses - Non-accrual Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Non-accrual	$ 7,963	$ 6,294
90 Days Past Due And Still Accruing	586	119
Commercial, Financial, and Agricultural
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Non-accrual	2,423	2,228
90 Days Past Due And Still Accruing	0	0
Real estate construction − residential
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Non-accrual	456	432
90 Days Past Due And Still Accruing	0	0
Real estate construction − commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Non-accrual	64	69
90 Days Past Due And Still Accruing	0	0
Real estate mortgage − residential
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Non-accrual	525	587
90 Days Past Due And Still Accruing	573	115
Real estate mortgage − commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Non-accrual	4,491	2,978
90 Days Past Due And Still Accruing	0	0
Installment and Other Consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Non-accrual	4	0
90 Days Past Due And Still Accruing	13	4
Non-performing TDRs - 90 days past due
Financing Receivable, Allowance for Credit Loss [Line Items]
Non-accrual with no Allowance	212	2,368
Non-accrual with Allowance	7,751	3,926
Total Non-accrual	7,963	6,294
90 Days Past Due And Still Accruing	586	119
Total Non-performing Loans	8,549	6,413
Non-performing TDRs - 90 days past due | Commercial, Financial, and Agricultural
Financing Receivable, Allowance for Credit Loss [Line Items]
Non-accrual with no Allowance	0	0
Non-accrual with Allowance	2,423	2,228
Total Non-accrual	2,423	2,228
90 Days Past Due And Still Accruing	0	0
Total Non-performing Loans	2,423	2,228
Non-performing TDRs - 90 days past due | Real estate construction − residential
Financing Receivable, Allowance for Credit Loss [Line Items]
Non-accrual with no Allowance	0	0
Non-accrual with Allowance	456	432
Total Non-accrual	456	432
90 Days Past Due And Still Accruing	0	0
Total Non-performing Loans	456	432
Non-performing TDRs - 90 days past due | Real estate construction − commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
Non-accrual with no Allowance	0	0
Non-accrual with Allowance	64	69
Total Non-accrual	64	69
90 Days Past Due And Still Accruing	0	0
Total Non-performing Loans	64	69
Non-performing TDRs - 90 days past due | Real estate mortgage − residential
Financing Receivable, Allowance for Credit Loss [Line Items]
Non-accrual with no Allowance	0	0
Non-accrual with Allowance	525	587
Total Non-accrual	525	587
90 Days Past Due And Still Accruing	573	115
Total Non-performing Loans	1,098	702
Non-performing TDRs - 90 days past due | Real estate mortgage − commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
Non-accrual with no Allowance	212	2,368
Non-accrual with Allowance	4,279	610
Total Non-accrual	4,491	2,978
90 Days Past Due And Still Accruing	0	0
Total Non-performing Loans	4,491	2,978
Non-performing TDRs - 90 days past due | Installment and Other Consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Non-accrual with no Allowance	0	0
Non-accrual with Allowance	4	0
Total Non-accrual	4	0
90 Days Past Due And Still Accruing	13	4
Total Non-performing Loans	$ 17	$ 4