Loans and Allowance for Credit Losses - Impairment Methodology (Details) - USD ($) $ in Thousands	Sep. 30, 2023		Jun. 30, 2023	Dec. 31, 2022		Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2021
Allowance for loan losses:
Individually evaluated for impairment				$ 258
Collectively evaluated for impairment				15,330
Total	$ 22,462	[1]	$ 22,236	15,588	[1]	$ 15,505	$ 15,353	$ 16,903
Loans outstanding:
Individually evaluated for impairment				20,361
Collectively evaluated for impairment				1,500,891
Total	1,556,969			1,521,252
Commercial, Financial, and Agricultural
Allowance for loan losses:
Individually evaluated for impairment				36
Collectively evaluated for impairment				2,699
Total	1,936		1,844	2,735		2,848	3,005	2,717
Loans outstanding:
Individually evaluated for impairment				295
Collectively evaluated for impairment				244,254
Total	227,372			244,549
Real Estate Construction - Residential
Allowance for loan losses:
Individually evaluated for impairment				0
Collectively evaluated for impairment				157
Total	873		748	157		71	66	137
Loans outstanding:
Individually evaluated for impairment				0
Collectively evaluated for impairment				32,095
Total	58,774			32,095
Real Estate Construction - Commercial
Allowance for loan losses:
Individually evaluated for impairment				11
Collectively evaluated for impairment				864
Total	3,265		3,422	875		849	762	588
Loans outstanding:
Individually evaluated for impairment				87
Collectively evaluated for impairment				137,148
Total	130,572			137,235
Real Estate Mortgage - Residential
Allowance for loan losses:
Individually evaluated for impairment				148
Collectively evaluated for impairment				3,181
Total	5,314		5,465	3,329		3,232	2,747	2,482
Loans outstanding:
Individually evaluated for impairment				1,863
Collectively evaluated for impairment				359,162
Total	379,514			361,025
Real Estate Mortgage - Commercial
Allowance for loan losses:
Individually evaluated for impairment				62
Collectively evaluated for impairment				7,938
Total	10,733		10,295	8,000		8,002	8,410	10,662
Loans outstanding:
Individually evaluated for impairment				18,110
Collectively evaluated for impairment				704,619
Total	739,413			722,729
Installment and Other Consumer
Allowance for loan losses:
Individually evaluated for impairment				1
Collectively evaluated for impairment				325
Total	244		217	326		316	312	256
Loans outstanding:
Individually evaluated for impairment				6
Collectively evaluated for impairment				23,613
Total	21,324			23,619
Un- allocated
Allowance for loan losses:
Individually evaluated for impairment				0
Collectively evaluated for impairment				166
Total	$ 97		$ 245	166		$ 187	$ 51	$ 61
Loans outstanding:
Individually evaluated for impairment				0
Collectively evaluated for impairment				0
Total				$ 0

[1] amounts include the impacts of the January 1, 2023 adoption of ASU 2016-13. See Note 2 for details.See accompanying notes to the consolidated financial statements (unaudited)