Loans And The Allowance For Credit Losses (Data, At Class Level, Of Credit Quality Indicators Of Certain Loans) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	$ 1,720,946	$ 1,672,369
Total Real Estate Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Allowance for Credit Losses, Charge-offs	198	1,871
Total gross loans	1,721,809	1,672,921
Total Real Estate Loans [Member] | Mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	1,497,643	1,422,280
Commercial And Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	24,348
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	44,924
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	24,356
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	13,144
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	5,954
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	9,244
Financing Receivable, Revolving	101,119
Total Past Due	223,089	250,095
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	4
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	3
Financing Receivable, Allowance for Credit Losses, Charge-offs	7
Total gross loans	223,100	250,069
Commercial And Industrial [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	24,338
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	42,967
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	21,614
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	12,174
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	5,686
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	6,539
Financing Receivable, Revolving	86,459
Total Past Due	199,777
Total gross loans		177,278
Commercial And Industrial [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans		40,603
Commercial And Industrial [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	10
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	1,955
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	2,739
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	510
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	268
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,867
Financing Receivable, Revolving	11,705
Total Past Due	19,054
Total gross loans		25,316
Commercial And Industrial [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	2
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	3
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	460
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	838
Financing Receivable, Revolving	2,955
Total Past Due	4,258
Total gross loans		6,872
Commercial And Industrial [Member] | Total Real Estate Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Allowance for Credit Losses, Charge-offs	7	1,546
Total gross loans	223,100	250,069
Commercial Real Estate Mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	132,525
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	200,831
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	182,077
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	96,125
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	82,964
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	275,339
Total Past Due	969,861
Commercial Real Estate Mortgages [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	132,525
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	194,197
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	169,943
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	95,264
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	66,243
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	263,628
Total Past Due	921,800
Commercial Real Estate Mortgages [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	6,634
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	397
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	861
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	9,988
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	8,094
Total Past Due	25,974
Commercial Real Estate Mortgages [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	11,737
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	6,733
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	3,617
Total Past Due	22,087
Commercial Real Estate Mortgages [Member] | Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	114,992	117,782
Total gross loans		117,403
Commercial Real Estate Mortgages [Member] | Construction [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans		77,378
Commercial Real Estate Mortgages [Member] | Construction [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans		22,639
Commercial Real Estate Mortgages [Member] | Construction [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans		4,979
Commercial Real Estate Mortgages [Member] | Construction [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans		12,407
Commercial Real Estate Mortgages [Member] | Mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	854,869	779,677
Commercial Real Estate Mortgages [Member] | Total Real Estate Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	969,188	896,117
Commercial Real Estate Mortgages [Member] | Total Real Estate Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans		644,490
Commercial Real Estate Mortgages [Member] | Total Real Estate Loans [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans		191,265
Commercial Real Estate Mortgages [Member] | Total Real Estate Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans		22,944
Commercial Real Estate Mortgages [Member] | Total Real Estate Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans		37,418
Commercial Real Estate Mortgages [Member] | Total Real Estate Loans [Member] | Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	114,623	117,403
Commercial Real Estate Mortgages [Member] | Total Real Estate Loans [Member] | Mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	854,565	778,714
Commercial Real Estate Mortgages [Member] | Total Real Estate Loans [Member] | Mortgages [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans		567,112
Commercial Real Estate Mortgages [Member] | Total Real Estate Loans [Member] | Mortgages [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans		168,626
Commercial Real Estate Mortgages [Member] | Total Real Estate Loans [Member] | Mortgages [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans		17,965
Commercial Real Estate Mortgages [Member] | Total Real Estate Loans [Member] | Mortgages [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans		25,011
Consumer And Other Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	597
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	176
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	27
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	12
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	13
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	20
Financing Receivable, Revolving	144
Total Past Due	989	657
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	145
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	18
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	1
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	1
Financing Receivable, Allowance for Credit Losses, Charge-offs	165
Total gross loans	1,066	572
Consumer And Other Loans [Member] | Performing Financial Instruments [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	597
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	176
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	27
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	12
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	13
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	20
Financing Receivable, Revolving	144
Total Past Due	989
Consumer And Other Loans [Member] | Total Real Estate Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Allowance for Credit Losses, Charge-offs	165	170
Total gross loans	1,066	572
Residential Mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	37,692
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	72,894
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	100,884
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	69,805
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	18,033
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	147,543
Total Past Due	446,851
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	1
Financing Receivable, Allowance for Credit Losses, Charge-offs	1
Residential Mortgages [Member] | Performing Financial Instruments [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	37,536
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	72,624
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	100,308
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	69,454
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	17,829
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	144,499
Total Past Due	442,250
Residential Mortgages [Member] | Non-Performing Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	156
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	270
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	576
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	351
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	204
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	3,044
Total Past Due	4,601
Residential Mortgages [Member] | Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	3,264	502
Residential Mortgages [Member] | Mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	443,587	439,708
Residential Mortgages [Member] | Total Real Estate Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Allowance for Credit Losses, Charge-offs	1	125
Total gross loans	447,043	443,749
Residential Mortgages [Member] | Total Real Estate Loans [Member] | Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	3,255	3,626
Residential Mortgages [Member] | Total Real Estate Loans [Member] | Mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	443,788	440,123
Home Equities [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	7,833
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	2,768
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	590
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	588
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	571
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	2,127
Financing Receivable, Revolving	65,679
Total Past Due	80,156
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	25
Financing Receivable, Allowance for Credit Losses, Charge-offs	25
Home Equities [Member] | Performing Financial Instruments [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	7,833
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	2,768
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	590
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	588
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	571
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	2,126
Financing Receivable, Revolving	65,165
Total Past Due	79,641
Home Equities [Member] | Non-Performing Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1
Financing Receivable, Revolving	514
Total Past Due	515
Home Equities [Member] | Total Real Estate Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	80,156	80,948
Financing Receivable, Allowance for Credit Losses, Charge-offs	25	30
Total gross loans	81,412	82,414
Home Equities [Member] | Total Real Estate Loans [Member] | Mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	$ 81,412	$ 82,414