Loans and Related Allowance for Loan Losses (Activity in the Allowance for Loan Losses by Loan Class) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	$ 3,906	$ 3,558	$ 4,094	$ 2,961
Provision for loan losses	(257)	87	(536)	639
Charge-offs	(2)	(13)	(10)	(41)
Recoveries	78	292	177	365
Ending balance	3,725	3,924	3,725	3,924
Loans allocated by: individually evaluated for impairment	5,749		5,749		$ 4,227
Loans allocated by: collectively evaluated for impairment	405,042		405,042		417,472
Financing receivable - Loans allocated	411,764		411,764		422,661
Allowance for loan losses allocated by: individually evaluated for impairment	0		0		2
Allowance for loan losses allocated by: collectively evaluated for impairment	3,725		3,725		4,092
Financing receivable - Allowance for loan losses	3,725		3,725		4,094
Commercial, Financial and Agricultural [Member] \| Commercial Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	289	311	302	321
Provision for loan losses	(9)	(40)	(29)	(50)
Charge-offs	0	0	0	0
Recoveries	0	0	7	0
Ending balance	280	271	280	271
Loans allocated by: individually evaluated for impairment	0		0		0
Loans allocated by: collectively evaluated for impairment	59,847		59,847		73,057
Financing receivable - Loans allocated	59,847		59,847		73,057
Allowance for loan losses allocated by: individually evaluated for impairment	0		0		0
Allowance for loan losses allocated by: collectively evaluated for impairment	280		280		302
Financing receivable - Allowance for loan losses	280		280		302
Commercial Loan [Member] \| Commercial Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	1,435	878	908	754
Provision for loan losses	(104)	(10)	423	114
Charge-offs	0	0	0	0
Recoveries	36	0	36	0
Ending balance	1,367	868	1,367	868
Loans allocated by: individually evaluated for impairment	5,283		5,283		3,483
Loans allocated by: collectively evaluated for impairment	149,546		149,546		118,876
Financing receivable - Loans allocated	155,198		155,198		122,698
Allowance for loan losses allocated by: individually evaluated for impairment	0		0		0
Allowance for loan losses allocated by: collectively evaluated for impairment	1,367		1,367		908
Financing receivable - Allowance for loan losses	1,367		1,367		908
Construction Loan [Member] \| Commercial Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	924	1,137	1,586	718
Provision for loan losses	(81)	145	(799)	502
Charge-offs	0	0	0	0
Recoveries	27	267	83	329
Ending balance	870	1,549	870	1,549
Loans allocated by: individually evaluated for impairment	0		0		0
Loans allocated by: collectively evaluated for impairment	40,612		40,612		61,051
Financing receivable - Loans allocated	40,612		40,612		61,051
Allowance for loan losses allocated by: individually evaluated for impairment	0		0		0
Allowance for loan losses allocated by: collectively evaluated for impairment	870		870		1,586
Financing receivable - Allowance for loan losses	870		870		1,586
Obligations of State and Political Subdivisions [Member] \| Commercial Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	33	22	28	17
Provision for loan losses	(5)	(1)	0	4
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Ending balance	28	21	28	21
Loans allocated by: individually evaluated for impairment	0		0		0
Loans allocated by: collectively evaluated for impairment	18,728		18,728		18,550
Financing receivable - Loans allocated	18,728		18,728		18,550
Allowance for loan losses allocated by: individually evaluated for impairment	0		0		0
Allowance for loan losses allocated by: collectively evaluated for impairment	28		28		28
Financing receivable - Allowance for loan losses	28		28		28
Mortgage Loan [Member] \| Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	1,164	1,149	1,200	1,081
Provision for loan losses	(54)	(12)	(119)	57
Charge-offs	0	(3)	0	(7)
Recoveries	12	24	41	27
Ending balance	1,122	1,158	1,122	1,158
Loans allocated by: individually evaluated for impairment	466		466		744
Loans allocated by: collectively evaluated for impairment	131,595		131,595		140,071
Financing receivable - Loans allocated	132,665		132,665		141,438
Allowance for loan losses allocated by: individually evaluated for impairment	0		0		2
Allowance for loan losses allocated by: collectively evaluated for impairment	1,122		1,122		1,198
Financing receivable - Allowance for loan losses	1,122		1,122		1,200
Personal Loan [Member] \| Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	61	61	70	70
Provision for loan losses	(4)	5	(12)	12
Charge-offs	(2)	(10)	(10)	(34)
Recoveries	3	1	10	9
Ending balance	58	$ 57	58	$ 57
Loans allocated by: individually evaluated for impairment	0		0		0
Loans allocated by: collectively evaluated for impairment	4,714		4,714		5,867
Financing receivable - Loans allocated	4,714		4,714		5,867
Allowance for loan losses allocated by: individually evaluated for impairment	0		0		0
Allowance for loan losses allocated by: collectively evaluated for impairment	58		58		70
Financing receivable - Allowance for loan losses	58		58		70
Acquired with Credit Deterioration [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans allocated by: individually evaluated for impairment	973		973		962
Allowance for loan losses allocated by: individually evaluated for impairment	0		0		0
Acquired with Credit Deterioration [Member] \| Commercial, Financial and Agricultural [Member] \| Commercial Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans allocated by: individually evaluated for impairment	0		0		0
Allowance for loan losses allocated by: individually evaluated for impairment	0		0		0
Acquired with Credit Deterioration [Member] \| Commercial Loan [Member] \| Commercial Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans allocated by: individually evaluated for impairment	369		369		339
Allowance for loan losses allocated by: individually evaluated for impairment	0		0		0
Acquired with Credit Deterioration [Member] \| Construction Loan [Member] \| Commercial Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans allocated by: individually evaluated for impairment	0		0		0
Allowance for loan losses allocated by: individually evaluated for impairment	0		0		0
Acquired with Credit Deterioration [Member] \| Obligations of State and Political Subdivisions [Member] \| Commercial Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans allocated by: individually evaluated for impairment	0		0		0
Allowance for loan losses allocated by: individually evaluated for impairment	0		0		0
Acquired with Credit Deterioration [Member] \| Mortgage Loan [Member] \| Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans allocated by: individually evaluated for impairment	604		604		623
Allowance for loan losses allocated by: individually evaluated for impairment	0		0		0
Acquired with Credit Deterioration [Member] \| Personal Loan [Member] \| Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans allocated by: individually evaluated for impairment	0		0		0
Allowance for loan losses allocated by: individually evaluated for impairment	$ 0		$ 0		$ 0

Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts.

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