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Allowance for Loan Loss (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Financing Receivable, Allowance for Credit Losses	$ 5,107	$ 5,308	$ 5,618	$ 4,386
Financing Receivable, Allowance for Credit Losses, Charge-offs	0	(4)	(6)	(40)
Financing Receivable, Allowance for Credit Losses, Recoveries	12	21	107	129
Financing Receivable Allowance For Credit Losses Net Chargeoffs Recoveries	12	17	101	89
Provision for loan losses	0	250	(600)	1,100
Financing Receivable, Allowance for Credit Losses	5,119	5,575	5,119	5,575
Commercial and Industrial Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Financing Receivable, Allowance for Credit Losses	829	679	807	577
Financing Receivable, Allowance for Credit Losses, Charge-offs	0	0	0	(4)
Financing Receivable, Allowance for Credit Losses, Recoveries	1	8	55	63
Financing Receivable Allowance For Credit Losses Net Chargeoffs Recoveries	1	8	55	59
Provision for loan losses	(14)	111	(46)	162
Financing Receivable, Allowance for Credit Losses	816	798	816	798
Construction And Land Development Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Financing Receivable, Allowance for Credit Losses	639	613	594	569
Financing Receivable, Allowance for Credit Losses, Charge-offs	0	0	0	0
Financing Receivable, Allowance for Credit Losses, Recoveries	0	0	0	0
Financing Receivable Allowance For Credit Losses Net Chargeoffs Recoveries	0	0	0	0
Provision for loan losses	(49)	(31)	(4)	13
Financing Receivable, Allowance for Credit Losses	590	582	590	582
Commercial Real Estate Loans, Total [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Financing Receivable, Allowance for Credit Losses	2,704	2,915	3,169	2,289
Financing Receivable, Allowance for Credit Losses, Charge-offs	0	0	0	0
Financing Receivable, Allowance for Credit Losses, Recoveries	0	0	0	0
Financing Receivable Allowance For Credit Losses Net Chargeoffs Recoveries	0	0	0	0
Provision for loan losses	119	205	(346)	831
Financing Receivable, Allowance for Credit Losses	2,823	3,120	2,823	3,120
Residential Real Estate Loans, Total [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Financing Receivable, Allowance for Credit Losses	838	954	944	813
Financing Receivable, Allowance for Credit Losses, Charge-offs	0	0	(1)	0
Financing Receivable, Allowance for Credit Losses, Recoveries	7	8	33	53
Financing Receivable Allowance For Credit Losses Net Chargeoffs Recoveries	7	8	32	53
Provision for loan losses	(46)	(8)	(177)	88
Financing Receivable, Allowance for Credit Losses	799	954	799	954
Consumer Installment and Revolving Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Financing Receivable, Allowance for Credit Losses	97	147	104	138
Financing Receivable, Allowance for Credit Losses, Charge-offs	0	(4)	(5)	(36)
Financing Receivable, Allowance for Credit Losses, Recoveries	4	5	19	13
Financing Receivable Allowance For Credit Losses Net Chargeoffs Recoveries	4	1	14	(23)
Provision for loan losses	(10)	(27)	(27)	6
Financing Receivable, Allowance for Credit Losses	$ 91	$ 121	$ 91	$ 121

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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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Amount of increase in allowance for credit loss on financing receivable from recovery.

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

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Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value.

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