Allowance for Loan Loss (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Financing Receivable, Allowance for Credit Losses	$ 4,867	$ 4,808	$ 4,386	$ 4,790
Financing Receivable, Allowance for Credit Losses, Charge-offs	(31)	(1)	(36)	(16)
Financing Receivable, Allowance for Credit Losses, Recoveries	22	44	108	77
Financing Receivable Allowance For Credit Losses Net Chargeoffs Recoveries	(9)	43	72	61
Provision for loan losses	450	0	850	0
Financing Receivable, Allowance for Credit Losses	5,308	4,851	5,308	4,851
Commercial and Industrial Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Financing Receivable, Allowance for Credit Losses	675	686	577	778
Financing Receivable, Allowance for Credit Losses, Charge-offs	(4)	0	(4)	0
Financing Receivable, Allowance for Credit Losses, Recoveries	2	6	55	24
Financing Receivable Allowance For Credit Losses Net Chargeoffs Recoveries	(2)	6	51	24
Provision for loan losses	6	34	51	(76)
Financing Receivable, Allowance for Credit Losses	679	726	679	726
Construction And Land Development Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Financing Receivable, Allowance for Credit Losses	582	773	569	700
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	31	8	44	81
Financing Receivable, Allowance for Credit Losses	613	781	613	781
Commercial Real Estate Loans, Total [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Financing Receivable, Allowance for Credit Losses	2,596	2,251	2,289	2,218
Financing Receivable, Allowance for Credit Losses, Charge-offs	0	0	0	0
Financing Receivable, Allowance for Credit Losses, Recoveries	0	1	0	1
Financing Receivable Allowance For Credit Losses Net Chargeoffs Recoveries	0	1	0	1
Provision for loan losses	319	35	626	68
Financing Receivable, Allowance for Credit Losses	2,915	2,287	2,915	2,287
Residential Real Estate Loans, Total [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Financing Receivable, Allowance for Credit Losses	877	930	813	946
Financing Receivable, Allowance for Credit Losses, Charge-offs	0	0	0	0
Financing Receivable, Allowance for Credit Losses, Recoveries	14	33	45	47
Financing Receivable Allowance For Credit Losses Net Chargeoffs Recoveries	14	33	45	47
Provision for loan losses	63	(59)	96	(89)
Financing Receivable, Allowance for Credit Losses	954	904	954	904
Consumer Installment and Revolving Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Financing Receivable, Allowance for Credit Losses	137	168	138	148
Financing Receivable, Allowance for Credit Losses, Charge-offs	(27)	(1)	(32)	(16)
Financing Receivable, Allowance for Credit Losses, Recoveries	6	4	8	5
Financing Receivable Allowance For Credit Losses Net Chargeoffs Recoveries	(21)	3	(24)	(11)
Provision for loan losses	31	(18)	33	16
Financing Receivable, Allowance for Credit Losses	$ 147	$ 153	$ 147	$ 153