Loan Quality And Allowance For Loan Losses (Aging Of Payments Of The Loan Portfolio) (Details) - USD ($)	Mar. 31, 2021	Dec. 31, 2020
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans	$ 413,000	$ 871,000
Non-accrual loans	8,835,000	8,704,000
Total Loans	1,000,933,000	1,009,704,000
Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans	991,685,000	1,000,129,000
30 - 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans	372,000	489,000
60 - 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans	40,000	344,000
90 Days+ Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans	1,000	38,000
Residential Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans	348,000	265,000
Non-accrual loans	50,000	51,000
Total Loans	197,960,000	202,584,000
Residential Real Estate [Member] | Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans	197,562,000	202,268,000
Residential Real Estate [Member] | 30 - 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans	310,000	158,000
Residential Real Estate [Member] | 60 - 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans	38,000	81,000
Residential Real Estate [Member] | 90 Days+ Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans		26,000
Residential Real Estate [Member] | First Liens [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans	174,000	127,000
Non-accrual loans	41,000	41,000
Total Loans	132,009,000	137,224,000
Residential Real Estate [Member] | First Liens [Member] | Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans	131,794,000	137,056,000
Residential Real Estate [Member] | First Liens [Member] | 30 - 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans	174,000	43,000
Residential Real Estate [Member] | First Liens [Member] | 60 - 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans		58,000
Residential Real Estate [Member] | First Liens [Member] | 90 Days+ Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans		26,000
Residential Real Estate [Member] | Junior Liens & Lines Of Credit [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans	174,000	138,000
Non-accrual loans	9,000	10,000
Total Loans	65,951,000	65,360,000
Residential Real Estate [Member] | Junior Liens & Lines Of Credit [Member] | Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans	65,768,000	65,212,000
Residential Real Estate [Member] | Junior Liens & Lines Of Credit [Member] | 30 - 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans	136,000	115,000
Residential Real Estate [Member] | Junior Liens & Lines Of Credit [Member] | 60 - 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans	38,000	23,000
Residential Real Estate - Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	511,000	512,000
Total Loans	18,618,000	16,309,000
Residential Real Estate - Construction [Member] | Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans	18,107,000	15,797,000
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans		335,000
Non-accrual loans	8,167,000	8,033,000
Total Loans	493,544,000	503,977,000
Commercial Real Estate [Member] | Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans	485,377,000	495,609,000
Commercial Real Estate [Member] | 30 - 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans		74,000
Commercial Real Estate [Member] | 60 - 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans		261,000
Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans	50,000	219,000
Non-accrual loans	107,000	108,000
Total Loans	283,705,000	281,257,000
Commercial [Member] | Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans	283,548,000	280,930,000
Commercial [Member] | 30 - 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans	50,000	219,000
Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans	15,000	52,000
Total Loans	7,106,000	5,577,000
Consumer [Member] | Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans	7,091,000	5,525,000
Consumer [Member] | 30 - 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans	12,000	38,000
Consumer [Member] | 60 - 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans	2,000	2,000
Consumer [Member] | 90 Days+ Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans	$ 1,000	$ 12,000