Loans (Amortized Cost Basis of Loans by Class of Loans, Vintage and Risk Rating) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	$ 496,307		$ 496,307
Year one	687,199		687,199
Year two	228,614		228,614
Year three	240,183		240,183
Year four	390,216		390,216
Prior	1,229,530		1,229,530
Revolving Loans	63,498		63,498
Total Loans	3,335,547		3,335,547		$ 3,105,036
Current-period chargeoffs	(164)	$ (173)	(168)	$ (723)
Current-period recoveries	16	160	43	263
Current-period net chargeoffs, Prior			(88)
Current-period net chargeoffs, Revolving			(37)
Current-period net chargeoffs			(125)
Commercial And Industrial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	14,388		14,388
Year one	37,178		37,178
Year two	14,239		14,239
Year three	7,311		7,311
Year four	8,469		8,469
Prior	9,564		9,564
Revolving Loans	16,900		16,900
Total Loans	108,049		108,049		90,386
Current-period gross chargeoffs, Revolving			(80)
Current-period chargeoffs	(76)	(92)	(80)	(227)
Current-period recoveries, Revolving			43
Current-period recoveries	16	156	43	168
Current-period net chargeoffs, Revolving			(37)
Current-period net chargeoffs			(37)
Receivables converted to term loan	6,000		6,000
Commercial And Industrial [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	14,388		14,388
Year one	37,178		37,178
Year two	13,971		13,971
Year three	7,311		7,311
Year four	8,469		8,469
Prior	9,564		9,564
Revolving Loans	16,900		16,900
Total Loans	107,781		107,781
Commercial And Industrial [Member] | Watch [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Year two	268		268
Total Loans	268		268
SBA Paycheck Protection Program [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	4,234		4,234
Year two	193		193
Total Loans	4,427		4,427		30,534
SBA Paycheck Protection Program [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	4,234		4,234
Year two	193		193
Total Loans	4,427		4,427
Commercial Mortgages [Member] | Multifamily Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	167,476		167,476
Year one	182,443		182,443
Year two	40,105		40,105
Year three	137,117		137,117
Year four	142,627		142,627
Prior	289,249		289,249
Revolving Loans	225		225
Total Loans	959,242		959,242		864,207
Current-period chargeoffs		(2)		(252)
Commercial Mortgages [Member] | Other Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	135,167		135,167
Year one	226,470		226,470
Year two	112,845		112,845
Year three	36,121		36,121
Year four	45,293		45,293
Prior	217,026		217,026
Total Loans	772,922		772,922		700,872
Commercial Mortgages [Member] | Owner-occupied Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	45,877		45,877
Year one	62,697		62,697
Year two	23,389		23,389
Year three	42,105		42,105
Year four	2,874		2,874
Prior	38,505		38,505
Revolving Loans	710		710
Total Loans	216,157		216,157		171,533
Current-period chargeoffs				(165)
Current-period recoveries				91
Commercial Mortgages [Member] | Pass [Member] | Multifamily Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	167,476		167,476
Year one	182,443		182,443
Year two	40,105		40,105
Year three	137,117		137,117
Year four	140,252		140,252
Prior	282,881		282,881
Revolving Loans	225		225
Total Loans	950,499		950,499
Commercial Mortgages [Member] | Pass [Member] | Other Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	135,167		135,167
Year one	226,470		226,470
Year two	112,845		112,845
Year three	36,121		36,121
Year four	44,350		44,350
Prior	210,094		210,094
Total Loans	765,047		765,047
Commercial Mortgages [Member] | Pass [Member] | Owner-occupied Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	45,877		45,877
Year one	62,697		62,697
Year two	23,389		23,389
Year three	42,105		42,105
Year four	2,874		2,874
Prior	38,505		38,505
Revolving Loans	710		710
Total Loans	216,157		216,157
Commercial Mortgages [Member] | Watch [Member] | Multifamily Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Year four	2,375		2,375
Total Loans	2,375		2,375
Commercial Mortgages [Member] | Watch [Member] | Other Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Year four	943		943
Prior	1,169		1,169
Total Loans	2,112		2,112
Commercial Mortgages [Member] | Substandard [Member] | Multifamily Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Prior	6,368		6,368
Total Loans	6,368		6,368
Commercial Mortgages [Member] | Substandard [Member] | Other Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Prior	5,763		5,763
Total Loans	5,763		5,763
Residential Mortgages [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	133,132		133,132
Year one	174,177		174,177
Year two	37,843		37,843
Year three	17,429		17,429
Year four	190,953		190,953
Prior	675,073		675,073
Revolving Loans	44,929		44,929
Total Loans	1,273,536		1,273,536
Current-period gross chargeoffs, Prior			(88)
Current-period chargeoffs			(88)
Current-period net chargeoffs, Prior			(88)
Current-period net chargeoffs			(88)
Receivables converted to term loan	9,000		9,000
Residential Mortgages [Member] | Closed-end [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans	1,228,607		1,228,607		1,202,374
Current-period chargeoffs	(88)	(79)	(88)	(79)
Current-period recoveries		3		3
Residential Mortgages [Member] | Revolving Home Equity [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans	44,929		44,929		44,139
Residential Mortgages [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	133,132		133,132
Year one	174,177		174,177
Year two	37,843		37,843
Year three	17,429		17,429
Year four	190,953		190,953
Prior	674,336		674,336
Revolving Loans	44,929		44,929
Total Loans	1,272,799		1,272,799
Residential Mortgages [Member] | Watch [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Prior	477		477
Total Loans	477		477
Residential Mortgages [Member] | Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Prior	260		260
Total Loans	260		260
Consumer And Other [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	267		267
Year three	100		100
Prior	113		113
Revolving Loans	734		734
Total Loans	1,214		1,214		$ 991
Current-period recoveries		$ 1		$ 1
Consumer And Other [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	267		267
Year three	100		100
Prior	113		113
Revolving Loans	556		556
Total Loans	1,036		1,036
Consumer And Other [Member] | Not Rated [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans	178		178
Total Loans	$ 178		$ 178