Loans and Allowance for Loan Losses - Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021	Dec. 31, 2020
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	$ 15,353	$ 18,735	$ 16,903	$ 18,113	$ 18,113
Additions:
Provision for (release of) loan losses	300	300	(1,000)	700
Deductions:
Loans charged off	191	156	546	345
Less recoveries on loans	(43)	(50)	(148)	(461)
Net loan charge-offs (recoveries)	148	106	398	(116)
Balance at end of period	15,505	18,929	$ 15,505	18,929	16,903	$ 18,113
Amount of PPP loans funded during the period					47,500	88,400
Percentage credit guarantee from the SBA for the PPP loans			100.00%
Allowance for PPP loans	0		$ 0
SBA PPP loans, net	600		$ 600
Paycheck protection program interest rate			1.00%
Commercial, Financial, and Agricultural
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	3,005	5,336	$ 2,717	5,121	5,121
Additions:
Provision for (release of) loan losses	(124)	(609)	188	(522)
Deductions:
Loans charged off	46	45	106	100
Less recoveries on loans	(13)	(19)	(49)	(202)
Net loan charge-offs (recoveries)	33	26	57	(102)
Balance at end of period	2,848	4,701	2,848	4,701	2,717	5,121
SBA PPP loans, net	600		600
Real Estate Construction - Residential & Real Estate Mortgage - Residential
Deductions:
SBA PPP loans, net					8,400
Real Estate Construction - Residential & Real Estate Mortgage - Residential | Construction
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	66	251	137	213	213
Additions:
Provision for (release of) loan losses	5	(16)	(66)	9
Deductions:
Loans charged off	0	0	0	0
Less recoveries on loans	0	0	0	(13)
Net loan charge-offs (recoveries)	0	0	0	(13)
Balance at end of period	71	235	71	235	137	213
Real Estate Construction - Residential & Real Estate Mortgage - Residential | Mortgage
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	2,747	2,467	2,482	2,679	2,679
Additions:
Provision for (release of) loan losses	481	216	723	(167)
Deductions:
Loans charged off	0	18	0	22
Less recoveries on loans	(4)	(8)	(27)	(183)
Net loan charge-offs (recoveries)	(4)	10	(27)	(161)
Balance at end of period	3,232	2,673	3,232	2,673	2,482	2,679
Real Estate Construction - Commercial & Real Estate Mortgage - Commercial | Construction
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	762	495	588	475	475
Additions:
Provision for (release of) loan losses	87	(70)	261	(50)
Deductions:
Loans charged off	0	0	0	0
Less recoveries on loans	0	0	0	0
Net loan charge-offs (recoveries)	0	0	0	0
Balance at end of period	849	425	849	425	588	475
Real Estate Construction - Commercial & Real Estate Mortgage - Commercial | Mortgage
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	8,410	9,915	10,662	9,354	9,354
Additions:
Provision for (release of) loan losses	(414)	780	(2,491)	1,368
Deductions:
Loans charged off	(1)	15	178	42
Less recoveries on loans	(5)	(1)	(9)	(1)
Net loan charge-offs (recoveries)	(6)	14	169	41
Balance at end of period	8,002	10,681	8,002	10,681	10,662	9,354
Installment and Other Consumer
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	312	252	256	264	264
Additions:
Provision for (release of) loan losses	129	59	259	110
Deductions:
Loans charged off	146	78	262	181
Less recoveries on loans	(21)	(22)	(63)	(62)
Net loan charge-offs (recoveries)	125	56	199	119
Balance at end of period	316	255	316	255	256	264
Un- allocated
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	51	19	61	7	7
Additions:
Provision for (release of) loan losses	136	(60)	126	(48)
Deductions:
Loans charged off	0		0
Less recoveries on loans			0
Net loan charge-offs (recoveries)	0	0	0	0
Balance at end of period	$ 187	$ (41)	$ 187	$ (41)	$ 61	$ 7