Loans And The Allowance For Credit Losses (Data, At Class Level, Of Credit Quality Indicators Of Certain Loans) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Financing Receivable, Recorded Investment [Line Items]
Total Balance	$ 1,721,876	$ 1,720,946
Commercial And Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	14,680	24,348
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	23,727	44,924
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	40,055	24,356
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	22,051	13,144
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	12,689	5,954
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	13,608	9,244
Financing Receivable, Revolving	99,126	101,119
Total Balance	225,936	223,089
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	59
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff		4
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	8	3
Financing Receivable, Allowance for Credit Losses, Charge-offs	67	7
Commercial And Industrial [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	14,680	24,338
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	22,780	42,967
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	37,089	21,614
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	19,383	12,174
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	11,442	5,686
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	11,929	6,539
Financing Receivable, Revolving	82,532	86,459
Total Balance	199,835	199,777
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	947	1,955
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	2,516	2,739
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	2,666	510
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	820	268
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,337	1,867
Financing Receivable, Revolving	13,567	11,705
Total Balance	21,853	19,054
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	450	3
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	2	460
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	427
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	342	838
Financing Receivable, Revolving	3,027	2,955
Total Balance	4,248	4,258
Commercial Real Estate Mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	14,168	132,525
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	144,191	200,831
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	203,122	182,077
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	169,346	96,125
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	95,303	82,964
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	345,796	275,339
Total Balance	971,926	969,861
Commercial Real Estate Mortgages [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	14,168	132,525
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	144,191	194,197
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	194,358	169,943
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	157,281	95,264
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	95,303	66,243
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	322,479	263,628
Total Balance	927,780	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	4,008	397
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	393	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	14,727	8,094
Total Balance	19,128	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	4,756	11,737
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	11,672
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		6,733
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	8,590	3,617
Total Balance	25,018	22,087
Consumer And Other Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	146	597
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	527	176
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	156	27
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	24	12
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	10	13
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	23	20
Financing Receivable, Revolving	124	144
Total Balance	1,010	989
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	31	145
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	3	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	34	165
Consumer And Other Loans [Member] | Performing Financial Instruments [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	146	597
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	527	176
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	156	27
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	24	12
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	10	13
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	23	20
Financing Receivable, Revolving	124	144
Total Balance	1,010	989
Residential Mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	6,679	37,692
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	36,646	72,894
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	71,704	100,884
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	99,079	69,805
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	68,405	18,033
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	161,556	147,543
Total Balance	444,069	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	6,679	37,536
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	36,281	72,624
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	71,441	100,308
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	98,508	69,454
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	68,276	17,829
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	158,033	144,499
Total Balance	439,218	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	365	270
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	263	576
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	571	351
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	129	204
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	3,523	3,044
Total Balance	4,851	4,601
Home Equities [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	926	7,833
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	7,343	2,768
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	2,668	590
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	559	588
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	556	571
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	2,542	2,127
Financing Receivable, Revolving	64,341	65,679
Total Balance	78,935	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	926	7,833
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	7,343	2,768
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	2,668	590
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	559	588
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	556	571
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	2,541	2,126
Financing Receivable, Revolving	63,723	65,165
Total Balance	78,316	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	1
Financing Receivable, Revolving	618	514
Total Balance	$ 619	$ 515