Loans (Amortized Cost Basis of Loans by Class of Loans, Vintage and Risk Rating) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	$ 626,897		$ 626,897
Year one	674,812		674,812
Year two	222,198		222,198
Year three	225,659		225,659
Year four	365,730		365,730
Prior	1,156,500		1,156,500
Revolving Loans	61,407		61,407
Total Loans	3,333,203		3,333,203		$ 3,105,036
Current-period chargeoffs	(628)	$ (293)	(796)	$ (1,016)
Current-period recoveries	21	290	64	553
Current-period net chargeoffs, Prior			(372)
Current-period net chargeoffs, Revolving			(360)
Current-period net chargeoffs			(732)
Commercial And Industrial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	28,101		28,101
Year one	35,195		35,195
Year two	10,968		10,968
Year three	6,006		6,006
Year four	8,278		8,278
Prior	8,672		8,672
Revolving Loans	15,653		15,653
Total Loans	112,873		112,873		90,386
Current-period gross chargeoffs, Revolving			(424)
Current-period chargeoffs	(344)		(424)	(227)
Current-period recoveries, Revolving			64
Current-period recoveries	21	20	64	188
Current-period net chargeoffs, Revolving			(360)
Current-period net chargeoffs			(360)
Receivables converted to term loan	5,300		5,300
Commercial And Industrial [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	28,101		28,101
Year one	30,194		30,194
Year two	10,697		10,697
Year three	6,006		6,006
Year four	8,278		8,278
Prior	8,672		8,672
Revolving Loans	15,638		15,638
Total Loans	107,586		107,586
Commercial And Industrial [Member] | Watch [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	5,001		5,001
Year two	271		271
Revolving Loans	15		15
Total Loans	5,287		5,287
SBA Paycheck Protection Program [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Year two	193		193
Total Loans	193		193		30,534
SBA Paycheck Protection Program [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Year two	193		193
Total Loans	193		193
Commercial Mortgages [Member] | Multifamily Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	191,239		191,239
Year one	181,529		181,529
Year two	39,899		39,899
Year three	125,813		125,813
Year four	122,263		122,263
Prior	266,749		266,749
Revolving Loans	225		225
Total Loans	927,717		927,717		864,207
Current-period chargeoffs		(292)		(544)
Commercial Mortgages [Member] | Other Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	178,787		178,787
Year one	225,269		225,269
Year two	112,317		112,317
Year three	34,647		34,647
Year four	45,060		45,060
Prior	197,512		197,512
Total Loans	793,592		793,592		700,872
Commercial Mortgages [Member] | Owner-occupied Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	54,919		54,919
Year one	62,134		62,134
Year two	21,321		21,321
Year three	41,821		41,821
Year four	2,819		2,819
Prior	36,793		36,793
Revolving Loans	1,098		1,098
Total Loans	220,905		220,905		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	191,239		191,239
Year one	181,529		181,529
Year two	39,899		39,899
Year three	125,813		125,813
Year four	122,263		122,263
Prior	260,415		260,415
Revolving Loans	225		225
Total Loans	921,383		921,383
Commercial Mortgages [Member] | Pass [Member] | Other Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	178,787		178,787
Year one	225,269		225,269
Year two	112,317		112,317
Year three	34,647		34,647
Year four	44,121		44,121
Prior	190,614		190,614
Total Loans	785,755		785,755
Commercial Mortgages [Member] | Pass [Member] | Owner-occupied Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	54,919		54,919
Year one	62,134		62,134
Year two	21,321		21,321
Year three	41,821		41,821
Year four	2,819		2,819
Prior	36,793		36,793
Revolving Loans	1,098		1,098
Total Loans	220,905		220,905
Commercial Mortgages [Member] | Watch [Member] | Other Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Year four	939		939
Total Loans	939		939
Commercial Mortgages [Member] | Substandard [Member] | Multifamily Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Prior	6,334		6,334
Total Loans	6,334		6,334
Commercial Mortgages [Member] | Substandard [Member] | Other Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Prior	6,898		6,898
Total Loans	6,898		6,898
Residential Mortgages [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	173,556		173,556
Year one	170,685		170,685
Year two	37,500		37,500
Year three	17,272		17,272
Year four	187,310		187,310
Prior	646,682		646,682
Revolving Loans	43,276		43,276
Total Loans	1,276,281		1,276,281
Current-period gross chargeoffs, Prior			(372)
Current-period chargeoffs			(372)
Current-period net chargeoffs, Prior			(372)
Current-period net chargeoffs			(372)
Receivables converted to term loan	9,100		9,100
Residential Mortgages [Member] | Closed-end [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans	1,233,005		1,233,005		1,202,374
Current-period chargeoffs	(284)		(372)	(79)
Current-period recoveries		16		19
Residential Mortgages [Member] | Revolving Home Equity [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans	43,276		43,276		44,139
Current-period recoveries		254		254
Residential Mortgages [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	173,556		173,556
Year one	170,685		170,685
Year two	37,500		37,500
Year three	17,272		17,272
Year four	187,310		187,310
Prior	646,210		646,210
Revolving Loans	43,276		43,276
Total Loans	1,275,809		1,275,809
Residential Mortgages [Member] | Watch [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Prior	472		472
Total Loans	472		472
Consumer And Other [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	295		295
Year three	100		100
Prior	92		92
Revolving Loans	1,155		1,155
Total Loans	1,642		1,642		$ 991
Current-period chargeoffs		$ (1)		(1)
Current-period recoveries				$ 1
Consumer And Other [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	295		295
Year three	100		100
Prior	92		92
Revolving Loans	810		810
Total Loans	1,297		1,297
Consumer And Other [Member] | Not Rated [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans	345		345
Total Loans	$ 345		$ 345