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Loan Quality And Allowance For Loan Losses (Allowance For Loan Losses, By Loan Segment) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance, Beginning Balance	$ 16,789,000	$ 11,966,000
Charge-offs	(36,000)	(250,000)
Recoveries	183,000	14,000
Provision	(800,000)	3,000,000
Allowance, Ending Balance	16,136,000	14,730,000
Loans evaluated for allowance individually	17,142,000		$ 17,253,000
Loans evaluated for allowance collectively	983,791,000		992,451,000
Total Loans	1,000,933,000		1,009,704,000
Allowance established for loans evaluated individually	228,000		228,000
Allowance established for loan evaluated collectively	15,908,000		16,561,000
Total Allowance	16,136,000		16,789,000
Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Loans	197,960,000		202,584,000
Residential Real Estate - Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance, Beginning Balance	294,000	186,000
Provision	24,000	82,000
Allowance, Ending Balance	318,000	268,000
Loans evaluated for allowance individually	511,000		512,000
Loans evaluated for allowance collectively	18,107,000		15,797,000
Total Loans	18,618,000		16,309,000
Allowance established for loan evaluated collectively	318,000		294,000
Total Allowance	318,000		294,000
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance, Beginning Balance	9,163,000	6,607,000
Charge-offs	(13,000)
Provision	(365,000)	1,660,000
Allowance, Ending Balance	8,785,000	8,267,000
Loans evaluated for allowance individually	16,000,000		16,104,000
Loans evaluated for allowance collectively	477,544,000		487,873,000
Total Loans	493,544,000		503,977,000
Allowance established for loans evaluated individually	228,000		228,000
Allowance established for loan evaluated collectively	8,557,000		8,935,000
Total Allowance	8,785,000		9,163,000
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance, Beginning Balance	5,679,000	4,022,000
Charge-offs	(5,000)	(220,000)
Recoveries	7,000	5,000
Provision	(208,000)	889,000
Allowance, Ending Balance	5,473,000	4,696,000
Loans evaluated for allowance collectively	283,705,000		281,257,000
Total Loans	283,705,000		281,257,000
Allowance established for loan evaluated collectively	5,473,000		5,679,000
Total Allowance	5,473,000		5,679,000
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance, Beginning Balance	97,000	84,000
Charge-offs	(18,000)	(30,000)
Recoveries	7,000	6,000
Provision	27,000	38,000
Allowance, Ending Balance	113,000	98,000
Loans evaluated for allowance collectively	7,106,000		5,577,000
Total Loans	7,106,000		5,577,000
Allowance established for loan evaluated collectively	113,000		97,000
Total Allowance	113,000		97,000
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance, Beginning Balance	775,000	532,000
Provision	14,000	128,000
Allowance, Ending Balance	789,000	660,000
Allowance established for loan evaluated collectively	789,000		775,000
Total Allowance	789,000		775,000
First Liens [Member] | Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance, Beginning Balance	555,000	416,000
Recoveries		3,000
Provision	(108,000)	144,000
Allowance, Ending Balance	447,000	563,000
Loans evaluated for allowance individually	631,000		637,000
Loans evaluated for allowance collectively	131,378,000		136,587,000
Total Loans	132,009,000		137,224,000
Allowance established for loan evaluated collectively	447,000		555,000
Total Allowance	447,000		555,000
Junior Liens & Lines Of Credit [Member] | Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance, Beginning Balance	226,000	119,000
Recoveries	169,000
Provision	(184,000)	59,000
Allowance, Ending Balance	211,000	$ 178,000
Loans evaluated for allowance collectively	65,951,000		65,360,000
Total Loans	65,951,000		65,360,000
Allowance established for loan evaluated collectively	211,000		226,000
Total Allowance	$ 211,000		$ 226,000

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- Definition

Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

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