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Loans, Allowance For Loan Losses And OREO (Narrative) (Details) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2020 USD ($) contract loan item	Sep. 30, 2019 contract	Sep. 30, 2020 USD ($) contract loan item	Sep. 30, 2019 contract	Dec. 31, 2019 USD ($) contract item	Dec. 31, 2018 USD ($)
Financing Receivable, Modifications [Line Items]
Loan modifications that would have been classified as TDRs | contract	0	0	0	0
Loan modifications classified as TDRs | contract	0	0	0	0
Outstanding commitments to disburse additional funds on TDR's | contract			0		0
Other real estate owned	$ 1,405		$ 1,405		$ 2,339	$ 2,430
Principal Balance	$ 95,258,000		$ 95,258,000
Number of loans modified | loan	184		184
Residential [Member]
Financing Receivable, Modifications [Line Items]
Number of real estate properties held | item	0		0		4
Other real estate owned					$ 325
Modified Loans [Member]
Financing Receivable, Modifications [Line Items]
Principal Balance	$ 8,944,000		$ 8,944,000
Number of loans modified | loan	9		9
Modified Loans One [Member]
Financing Receivable, Modifications [Line Items]
Principal Balance	$ 8,089,000		$ 8,089,000
Number of loans modified | loan	4		4
Modified Loans Two [Member]
Financing Receivable, Modifications [Line Items]
Principal Balance	$ 855,000		$ 855,000
Number of loans modified | loan	5		5
Modified Loans, Second Deferrals [Member]
Financing Receivable, Modifications [Line Items]
Principal Balance	$ 6,000,000		$ 6,000,000
Number of loans modified | loan	4		4
Covid-19 [Member] | Loan Portfolio [Member] | Modified Loans [Member]
Financing Receivable, Modifications [Line Items]
Percent of total loan portfolio			1.43%

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