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Loans, Allowance For Loan Losses And OREO (Narrative) (Details)	3 Months Ended		12 Months Ended
	Mar. 31, 2020 USD ($) contract loan item	Mar. 31, 2019 contract	Dec. 31, 2019 USD ($) contract item	May 15, 2020 USD ($) loan	Dec. 31, 2018 USD ($)
Financing Receivable, Modifications [Line Items]
Loan modifications that would have been classified as TDRs | contract	0	0
Loan modifications classified as TDRs | contract	0	0
Outstanding commitments to disburse additional funds on TDR's | contract	0		0
Other real estate owned	$ 1,761,000		$ 2,339,000		$ 2,430,000
Number of loans modified | loan	69
Residential Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of real estate properties held | item	1		4
Other real estate owned	$ 18,000		$ 325,000
Covid-19 [Member] | Loan Portfolio [Member]
Financing Receivable, Modifications [Line Items]
Percent of Total Loan Portfolio	14.27%
Percentage of deferral loans with 3 month deferrals	34.15%
Covid-19 [Member] | Loan Portfolio [Member] | Commercial Loan [Member]
Financing Receivable, Modifications [Line Items]
Principale Balance	$ 79,760,000
Number of loans | loan	142
Percent of Total Loan Portfolio	13.84%
Covid-19 [Member] | Loan Portfolio [Member] | Retail Loan [Member]
Financing Receivable, Modifications [Line Items]
Principale Balance	$ 2,429,000
Number of loans | loan	17
Percent of Total Loan Portfolio	0.42%
Covid-19 [Member] | Loan Portfolio [Member] | Subsequent Event [Member]
Financing Receivable, Modifications [Line Items]
Principale Balance				$ 82,189,000
Number of loans | loan				159

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