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Allowance for Loan Loss (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Financing Receivable, Allowance for Credit Losses	$ 5,618	$ 4,386
Financing Receivable, Allowance for Credit Losses, Charge-offs	(5)	(5)
Financing Receivable, Allowance for Credit Losses, Recoveries	69	86
Financing Receivable Allowance For Credit Losses Net Chargeoffs Recoveries	64	81
Provision for loan losses	0	400
Financing Receivable, Allowance for Credit Losses	5,682	4,867
Commercial and Industrial Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Financing Receivable, Allowance for Credit Losses	807	577
Financing Receivable, Allowance for Credit Losses, Charge-offs	0	0
Financing Receivable, Allowance for Credit Losses, Recoveries	2	53
Financing Receivable Allowance For Credit Losses Net Chargeoffs Recoveries	2	53
Provision for loan losses	19	45
Financing Receivable, Allowance for Credit Losses	828	675
Construction And Land Development Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Financing Receivable, Allowance for Credit Losses	594	569
Financing Receivable, Allowance for Credit Losses, Charge-offs	0	0
Financing Receivable, Allowance for Credit Losses, Recoveries	0	0
Financing Receivable Allowance For Credit Losses Net Chargeoffs Recoveries	0	0
Provision for loan losses	(43)	13
Financing Receivable, Allowance for Credit Losses	551	582
Commercial Real Estate Loans, Total [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Financing Receivable, Allowance for Credit Losses	3,169	2,289
Financing Receivable, Allowance for Credit Losses, Charge-offs	0	0
Financing Receivable, Allowance for Credit Losses, Recoveries	50	0
Financing Receivable Allowance For Credit Losses Net Chargeoffs Recoveries	50	0
Provision for loan losses	40	307
Financing Receivable, Allowance for Credit Losses	3,259	2,596
Residential Real Estate Loans, Total [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Financing Receivable, Allowance for Credit Losses	944	813
Financing Receivable, Allowance for Credit Losses, Charge-offs	0	0
Financing Receivable, Allowance for Credit Losses, Recoveries	13	31
Financing Receivable Allowance For Credit Losses Net Chargeoffs Recoveries	13	31
Provision for loan losses	(6)	33
Financing Receivable, Allowance for Credit Losses	951	877
Consumer Installment and Revolving Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Financing Receivable, Allowance for Credit Losses	104	138
Financing Receivable, Allowance for Credit Losses, Charge-offs	(5)	(5)
Financing Receivable, Allowance for Credit Losses, Recoveries	4	2
Financing Receivable Allowance For Credit Losses Net Chargeoffs Recoveries	(1)	(3)
Provision for loan losses	(10)	2
Financing Receivable, Allowance for Credit Losses	$ 93	$ 137

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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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