Loan Quality And Allowance for Credit Losses (Schedule Of Loans By Year Of Origination And Internally Assigned Risk Ratings) (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Loans	$ 1,277,595		$ 1,256,985
Current period gross charge-offs, Total	(96)	$ (120)
Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, Current Year	8,667		62,995
Loans, One Year Before Current Fiscal Year	61,632		43,224
Loans, Two Years Before Current Fiscal Year	42,245		26,663
Loans, Three Years Before Current Fiscal Year	26,166		19,936
Loans, Four Years Before Current Fiscal Year	19,273		7,655
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	19,273		7,655
Prior	56,009		51,329
Revolving Loans Amortized Cost Basis	46,065		46,025
Revolving Loans Converted to Term	21,146		20,022
Total Loans	281,203		277,849
Residential Real Estate [Member] | First Liens [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Loans	208,994		205,288
Residential Real Estate [Member] | Junior Liens & Lines Of Credit [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Loans	72,209		72,561
Residential Real Estate [Member] | Residential Real Estate Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, Current Year	2,305		9,867
Loans, One Year Before Current Fiscal Year	9,845		9,088
Loans, Two Years Before Current Fiscal Year	8,813		11,038
Loans, Three Years Before Current Fiscal Year	10,904		9,691
Loans, Four Years Before Current Fiscal Year	9,427		2,433
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	9,427		2,433
Prior	24,002		22,906
Revolving Loans Amortized Cost Basis	2,342		2,057
Total Loans	67,638		67,080
Residential Real Estate [Member] | Residential Real Estate Commercial [Member] | Pass [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, Current Year	2,305		9,867
Loans, One Year Before Current Fiscal Year	9,845		9,088
Loans, Two Years Before Current Fiscal Year	8,813		11,038
Loans, Three Years Before Current Fiscal Year	10,904		9,691
Loans, Four Years Before Current Fiscal Year	9,427		2,433
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	9,427		2,433
Prior	24,002		22,906
Revolving Loans Amortized Cost Basis	2,342		2,057
Total Loans	67,638		67,080
Residential Real Estate [Member] | Residential Real Estate Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, Current Year	6,362		53,128
Loans, One Year Before Current Fiscal Year	51,787		34,136
Loans, Two Years Before Current Fiscal Year	33,432		15,625
Loans, Three Years Before Current Fiscal Year	15,262		10,245
Loans, Four Years Before Current Fiscal Year	9,846		5,222
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	9,846		5,222
Prior	32,007		28,423
Revolving Loans Amortized Cost Basis	43,723		43,968
Revolving Loans Converted to Term	21,146		20,022
Total Loans	213,565		210,769
Residential Real Estate [Member] | Residential Real Estate Consumer [Member] | Performing [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, Current Year	6,362		53,128
Loans, One Year Before Current Fiscal Year	51,787		34,136
Loans, Two Years Before Current Fiscal Year	33,432		15,625
Loans, Three Years Before Current Fiscal Year	15,262		10,245
Loans, Four Years Before Current Fiscal Year	9,846		5,222
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	9,846		5,222
Prior	32,007		28,423
Revolving Loans Amortized Cost Basis	43,723		43,968
Revolving Loans Converted to Term	21,146		20,022
Total Loans	213,565		210,769
Residential Real Estate - Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, Current Year	940		20,682
Loans, One Year Before Current Fiscal Year	23,906		2,209
Loans, Two Years Before Current Fiscal Year	2,356		1,289
Loans, Three Years Before Current Fiscal Year	949		214
Loans, Four Years Before Current Fiscal Year	196
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	196
Prior	539		1,506
Total Loans	28,886		25,900
Residential Real Estate - Construction [Member] | Residential Real Estate Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, Current Year	252		6,845
Loans, One Year Before Current Fiscal Year	8,301		2,209
Loans, Two Years Before Current Fiscal Year	2,356		1,289
Loans, Three Years Before Current Fiscal Year	949		214
Loans, Four Years Before Current Fiscal Year	196
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	196
Prior	539		1,506
Total Loans	12,593		12,063
Residential Real Estate - Construction [Member] | Residential Real Estate Commercial [Member] | Pass [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, Current Year	252		6,845
Loans, One Year Before Current Fiscal Year	8,301		2,209
Loans, Two Years Before Current Fiscal Year	2,356		1,289
Loans, Three Years Before Current Fiscal Year	949		214
Loans, Four Years Before Current Fiscal Year	196
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	196
Prior	539		1,506
Total Loans	12,593		12,063
Residential Real Estate - Construction [Member] | Residential Real Estate Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, Current Year	688		13,837
Loans, One Year Before Current Fiscal Year	15,605
Total Loans	16,293		13,837
Residential Real Estate - Construction [Member] | Residential Real Estate Consumer [Member] | Performing [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, Current Year	688		13,837
Loans, One Year Before Current Fiscal Year	15,605
Total Loans	16,293		13,837
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, Current Year	17,044		183,007
Loans, One Year Before Current Fiscal Year	196,082		112,236
Loans, Two Years Before Current Fiscal Year	111,372		99,540
Loans, Three Years Before Current Fiscal Year	99,514		41,130
Loans, Four Years Before Current Fiscal Year	40,576		38,603
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	40,576		38,603
Prior	243,831		218,495
Revolving Loans Amortized Cost Basis	12,901		10,756
Total Loans	721,320		703,767
Loans Amortized Prior	(2)
Current period gross charge-offs, Total	(2)
Commercial Real Estate [Member] | Pass [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, Current Year	17,044		180,052
Loans, One Year Before Current Fiscal Year	193,141		110,886
Loans, Two Years Before Current Fiscal Year	110,031		98,540
Loans, Three Years Before Current Fiscal Year	98,514		34,307
Loans, Four Years Before Current Fiscal Year	33,814		38,603
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	33,814		38,603
Prior	239,161		214,179
Revolving Loans Amortized Cost Basis	12,727		10,567
Total Loans	704,432		687,134
Commercial Real Estate [Member] | OAEM [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, Current Year			2,955
Loans, One Year Before Current Fiscal Year	2,941		1,350
Loans, Two Years Before Current Fiscal Year	1,341		1,000
Loans, Three Years Before Current Fiscal Year	1,000		6,823
Loans, Four Years Before Current Fiscal Year	6,762
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	6,762
Prior	2,157		2,182
Revolving Loans Amortized Cost Basis	124		139
Total Loans	14,325		14,449
Commercial Real Estate [Member] | Substandard [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Prior	2,513		2,134
Revolving Loans Amortized Cost Basis	50		50
Total Loans	2,563		2,184
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, Current Year	2,214		34,851
Loans, One Year Before Current Fiscal Year	33,580		34,300
Loans, Two Years Before Current Fiscal Year	32,887		45,754
Loans, Three Years Before Current Fiscal Year	44,547		22,847
Loans, Four Years Before Current Fiscal Year	21,960		3,579
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	21,960		3,579
Prior	66,286		64,542
Revolving Loans Amortized Cost Basis	38,129		36,781
Total Loans	239,603		242,654
Current period gross charge-offs, 2024	(4)
Current period gross charge-offs, 2023			(125)
Current period gross charge-offs, 2021			(130)
Current period gross charge-offs, Revolving loans amortized cost basis	(62)		(50)
Current period gross charge-offs, Total	(66)	(86)	(305)
Commercial [Member] | Pass [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, Current Year	2,214		34,851
Loans, One Year Before Current Fiscal Year	33,580		33,983
Loans, Two Years Before Current Fiscal Year	32,580		45,754
Loans, Three Years Before Current Fiscal Year	44,547		22,847
Loans, Four Years Before Current Fiscal Year	21,959		3,579
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	21,959		3,579
Prior	66,286		64,542
Revolving Loans Amortized Cost Basis	37,933		36,508
Total Loans	239,099		242,064
Commercial [Member] | Substandard [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, One Year Before Current Fiscal Year			317
Loans, Two Years Before Current Fiscal Year	307
Loans, Four Years Before Current Fiscal Year	1
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	1
Revolving Loans Amortized Cost Basis	196		273
Total Loans	504		590
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, Current Year	648		1,863
Loans, One Year Before Current Fiscal Year	1,544		669
Loans, Two Years Before Current Fiscal Year	588		1,985
Loans, Three Years Before Current Fiscal Year	1,911		148
Loans, Four Years Before Current Fiscal Year	113		80
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	113		80
Prior	64		5
Revolving Loans Amortized Cost Basis	1,715		2,065
Total Loans	6,583		6,815
Current period gross charge-offs, 2024	(12)
Current period gross charge-offs, 2023			(63)
Current period gross charge-offs, 2022	(2)
Current period gross charge-offs, 2021			(10)
Current period gross charge-offs, 2020	(6)		(2)
Current period gross charge-offs, 2019			(6)
Loans Amortized Prior	(1)
Current period gross charge-offs, Revolving loans amortized cost basis	(7)		(36)
Current period gross charge-offs, Total	(28)	$ (34)	(117)
Consumer [Member] | Performing [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, Current Year	648		1,863
Loans, One Year Before Current Fiscal Year	1,544		669
Loans, Two Years Before Current Fiscal Year	588		1,985
Loans, Three Years Before Current Fiscal Year	1,911		148
Loans, Four Years Before Current Fiscal Year	113		80
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	113		80
Prior	64		5
Revolving Loans Amortized Cost Basis	1,710		2,060
Total Loans	6,578		6,810
Consumer [Member] | Nonperforming [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Revolving Loans Amortized Cost Basis	5		5
Total Loans	$ 5		$ 5