Loans and Related Allowance for Loan Losses (Allowance for Loan Losses and Related Investments in Loans Receivable) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	$ 2,961	$ 3,034
Provision for loan losses	721	(573)
Charge-offs	(56)	(137)
Recoveries	468	637
Ending balance	4,094	2,961
Loans allocated by: individually evaluated for impairment	4,227	2,516
Loans allocated by: collectively evaluated for impairment	417,472	397,004
Financing receivable - Loans allocated	422,661	400,590
Allowance for loan losses allocated by: individually evaluated for impairment	2	0
Allowance for loan losses allocated by: collectively evaluated for impairment	4,092	2,961
Financing receivable - Allowance for loan losses	4,094	2,961
Commercial, Financial and Agricultural [Member] \| Commercial Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	321	275
Provision for loan losses	(13)	45
Charge-offs	(7)	(2)
Recoveries	1	3
Ending balance	302	321
Loans allocated by: individually evaluated for impairment	0	0
Loans allocated by: collectively evaluated for impairment	73,057	51,785
Financing receivable - Loans allocated	73,057	51,785
Allowance for loan losses allocated by: individually evaluated for impairment	0	0
Allowance for loan losses allocated by: collectively evaluated for impairment	302	321
Financing receivable - Allowance for loan losses	302	321
Commercial Loan [Member] \| Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	754	1,074
Provision for loan losses	152	(619)
Charge-offs	0	(15)
Recoveries	2	314
Ending balance	908	754
Loans allocated by: individually evaluated for impairment	3,483	1,206
Loans allocated by: collectively evaluated for impairment	118,876	125,041
Financing receivable - Loans allocated	122,698	126,613
Allowance for loan losses allocated by: individually evaluated for impairment	0	0
Allowance for loan losses allocated by: collectively evaluated for impairment	908	754
Financing receivable - Allowance for loan losses	908	754
Construction Loan [Member] \| Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	718	558
Provision for loan losses	442	(135)
Charge-offs	0	0
Recoveries	426	295
Ending balance	1,586	718
Loans allocated by: individually evaluated for impairment	0	0
Loans allocated by: collectively evaluated for impairment	61,051	46,459
Financing receivable - Loans allocated	61,051	46,459
Allowance for loan losses allocated by: individually evaluated for impairment	0	0
Allowance for loan losses allocated by: collectively evaluated for impairment	1,586	718
Financing receivable - Allowance for loan losses	1,586	718
Obligations of State and Political Subdivisions [Member] \| Commercial Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	17	20
Provision for loan losses	11	(3)
Charge-offs	0	0
Recoveries	0	0
Ending balance	28	17
Loans allocated by: individually evaluated for impairment	0	0
Loans allocated by: collectively evaluated for impairment	18,550	16,377
Financing receivable - Loans allocated	18,550	16,377
Allowance for loan losses allocated by: individually evaluated for impairment	0	0
Allowance for loan losses allocated by: collectively evaluated for impairment	28	17
Financing receivable - Allowance for loan losses	28	17
Mortgage Loan [Member] \| Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	1,081	1,035
Provision for loan losses	96	105
Charge-offs	(7)	(66)
Recoveries	30	7
Ending balance	1,200	1,081
Loans allocated by: individually evaluated for impairment	744	1,296
Loans allocated by: collectively evaluated for impairment	140,071	148,538
Financing receivable - Loans allocated	141,438	150,538
Allowance for loan losses allocated by: individually evaluated for impairment	2	0
Allowance for loan losses allocated by: collectively evaluated for impairment	1,198	1,081
Financing receivable - Allowance for loan losses	1,200	1,081
Personal Loan [Member] \| Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	70	72
Provision for loan losses	33	34
Charge-offs	(42)	(54)
Recoveries	9	18
Ending balance	70	70
Loans allocated by: individually evaluated for impairment	0	14
Loans allocated by: collectively evaluated for impairment	5,867	8,804
Financing receivable - Loans allocated	5,867	8,818
Allowance for loan losses allocated by: individually evaluated for impairment	0	0
Allowance for loan losses allocated by: collectively evaluated for impairment	70	70
Financing receivable - Allowance for loan losses	70	70
Acquired with Credit Deterioration [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans allocated by: individually evaluated for impairment	962	1,070
Allowance for loan losses allocated by: individually evaluated for impairment	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
Allowance for loan losses allocated by: individually evaluated for impairment	0	0
Acquired with Credit Deterioration [Member] \| Commercial Loan [Member] \| Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans allocated by: individually evaluated for impairment	339	366
Allowance for loan losses allocated by: individually evaluated for impairment	0	0
Acquired with Credit Deterioration [Member] \| Construction Loan [Member] \| Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans allocated by: individually evaluated for impairment	0	0
Allowance for loan losses allocated by: individually evaluated for impairment	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
Allowance for loan losses allocated by: individually evaluated for impairment	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	623	704
Allowance for loan losses allocated by: individually evaluated for impairment	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
Allowance for loan losses allocated by: individually evaluated for impairment	$ 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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Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

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The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

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Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

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Amount of writeoff of financing receivable, charged against allowance for credit loss.

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The balance of financing receivables that were collectively evaluated for impairment.

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Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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Amount of expense related to estimated loss from loan and lease transactions.

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