Loan Quality And Allowance For Loan Losses (Allowance For Loan Losses, By Loan Segment) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance, Beginning Balance	$ 15,055,000	$ 16,555,000	$ 16,789,000	$ 11,966,000
Charge-offs	(129,000)	(28,000)	(214,000)	(452,000)
Recoveries	440,000	249,000	691,000	287,000
Provision		375,000	(1,900,000)	5,350,000
Allowance, Ending Balance	15,366,000	17,151,000	15,366,000	17,151,000
Loans evaluated for allowance individually	12,456,000		12,456,000		$ 17,253,000
Loans evaluated for allowance collectively	1,005,712,000		1,005,712,000		992,451,000
Total Loans	1,018,168,000		1,018,168,000		1,009,704,000
Allowance established for loans evaluated individually	1,308,000		1,308,000		228,000
Allowance established for loan evaluated collectively	14,058,000		14,058,000		16,561,000
Total Allowance	15,366,000		15,366,000		16,789,000
Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Loans	204,501,000		204,501,000		202,584,000
Residential Real Estate - Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance, Beginning Balance	349,000	242,000	294,000	187,000
Charge-offs			(28,000)
Provision	18,000	17,000	101,000	72,000
Allowance, Ending Balance	367,000	259,000	367,000	259,000
Loans evaluated for allowance individually	426,000		426,000		512,000
Loans evaluated for allowance collectively	21,652,000		21,652,000		15,797,000
Total Loans	22,078,000		22,078,000		16,309,000
Allowance established for loan evaluated collectively	367,000		367,000		294,000
Total Allowance	367,000		367,000		294,000
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance, Beginning Balance	7,878,000	8,837,000	9,163,000	6,607,000
Charge-offs			(13,000)
Recoveries			1,000
Provision	810,000	372,000	(463,000)	2,602,000
Allowance, Ending Balance	8,688,000	9,209,000	8,688,000	9,209,000
Loans evaluated for allowance individually	11,371,000		11,371,000		16,104,000
Loans evaluated for allowance collectively	515,721,000		515,721,000		487,873,000
Total Loans	527,092,000		527,092,000		503,977,000
Allowance established for loans evaluated individually	1,308,000		1,308,000		228,000
Allowance established for loan evaluated collectively	7,380,000		7,380,000		8,935,000
Total Allowance	8,688,000		8,688,000		9,163,000
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance, Beginning Balance	5,309,000	5,845,000	5,679,000	4,021,000
Charge-offs	(3,000)		(11,000)	(365,000)
Recoveries	436,000	243,000	497,000	267,000
Provision	(856,000)	(52,000)	(1,279,000)	2,113,000
Allowance, Ending Balance	4,886,000	6,036,000	4,886,000	6,036,000
Loans evaluated for allowance collectively	257,693,000		257,693,000		281,257,000
Total Loans	257,693,000		257,693,000		281,257,000
Allowance established for loan evaluated collectively	4,886,000		4,886,000		5,679,000
Total Allowance	4,886,000		4,886,000		5,679,000
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance, Beginning Balance	102,000	105,000	97,000	84,000
Charge-offs	(126,000)	(28,000)	(162,000)	(87,000)
Recoveries	4,000	6,000	23,000	16,000
Provision	157,000	11,000	179,000	81,000
Allowance, Ending Balance	137,000	94,000	137,000	94,000
Loans evaluated for allowance collectively	6,804,000		6,804,000		5,577,000
Total Loans	6,804,000		6,804,000		5,577,000
Allowance established for loan evaluated collectively	137,000		137,000		97,000
Total Allowance	137,000		137,000		97,000
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance, Beginning Balance	738,000	749,000	775,000	532,000
Provision	(187,000)	15,000	(224,000)	232,000
Allowance, Ending Balance	551,000	764,000	551,000	764,000
Allowance established for loan evaluated collectively	551,000		551,000		775,000
Total Allowance	551,000		551,000		775,000
First Liens [Member] | Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance, Beginning Balance	459,000	580,000	555,000	416,000
Recoveries				4,000
Provision	33,000	(2,000)	(63,000)	158,000
Allowance, Ending Balance	492,000	578,000	492,000	578,000
Loans evaluated for allowance individually	659,000		659,000		637,000
Loans evaluated for allowance collectively	133,620,000		133,620,000		136,587,000
Total Loans	134,279,000		134,279,000		137,224,000
Allowance established for loan evaluated collectively	492,000		492,000		555,000
Total Allowance	492,000		492,000		555,000
Junior Liens & Lines Of Credit [Member] | Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance, Beginning Balance	220,000	197,000	226,000	119,000
Recoveries			170,000
Provision	25,000	14,000	(151,000)	92,000
Allowance, Ending Balance	245,000	$ 211,000	245,000	$ 211,000
Loans evaluated for allowance collectively	70,222,000		70,222,000		65,360,000
Total Loans	70,222,000		70,222,000		65,360,000
Allowance established for loan evaluated collectively	245,000		245,000		226,000
Total Allowance	$ 245,000		$ 245,000		$ 226,000