Loans and Allowance for Loan Losses - Impairment Methodology (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	$ 317	$ 3,044
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	13,962	13,859
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Total	14,279	16,903	$ 18,361	$ 18,113
Loans and Leases Receivable, Gross, Carrying Amount [Abstract]
Financing receivable, individually evaluated for impairment	18,787	27,254
Financing Receivable, Collectively Evaluated for Impairment	1,315,136	1,274,879
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Total	1,333,923	1,302,133
Commercial, Financial, & Agricultural
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	39	42
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	2,791	2,675
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Total	2,830	2,717	4,676	5,121
Loans and Leases Receivable, Gross, Carrying Amount [Abstract]
Financing receivable, individually evaluated for impairment	319	341
Financing Receivable, Collectively Evaluated for Impairment	220,696	216,873
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Total	221,015	217,214
Residential real estate | Construction
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0	0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	60	137
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Total	60	137	309	213
Loans and Leases Receivable, Gross, Carrying Amount [Abstract]
Financing receivable, individually evaluated for impairment	0	0
Financing Receivable, Collectively Evaluated for Impairment	21,515	27,920
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Total	21,515	27,920
Residential real estate | Mortgages
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	206	166
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	2,372	2,316
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Total	2,578	2,482	2,594	2,679
Loans and Leases Receivable, Gross, Carrying Amount [Abstract]
Financing receivable, individually evaluated for impairment	2,428	2,391
Financing Receivable, Collectively Evaluated for Impairment	285,451	276,955
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Total	287,879	279,346
Commercial real estate | Construction
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	13	13
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	651	575
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Total	664	588	532	475
Loans and Leases Receivable, Gross, Carrying Amount [Abstract]
Financing receivable, individually evaluated for impairment	100	105
Financing Receivable, Collectively Evaluated for Impairment	103,378	91,264
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Total	103,478	91,369
Commercial real estate | Mortgages
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	41	2,815
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	7,651	7,847
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Total	7,692	10,662	9,904	9,354
Loans and Leases Receivable, Gross, Carrying Amount [Abstract]
Financing receivable, individually evaluated for impairment	15,800	24,357
Financing Receivable, Collectively Evaluated for Impairment	661,739	638,899
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Total	677,539	663,256
Installment and Other Consumer
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	18	8
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	255	248
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Total	273	256	245	264
Loans and Leases Receivable, Gross, Carrying Amount [Abstract]
Financing receivable, individually evaluated for impairment	140	60
Financing Receivable, Collectively Evaluated for Impairment	22,357	22,968
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Total	22,497	23,028
Un- allocated
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0	0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	182	61
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Total	182	61	$ 101	$ 7
Loans and Leases Receivable, Gross, Carrying Amount [Abstract]
Financing receivable, individually evaluated for impairment	0	0
Financing Receivable, Collectively Evaluated for Impairment	0	0
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Total	$ 0	$ 0