Loans (Allowance For Loan Losses) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit losses, beginning balance	$ 34,105,000	$ 30,199,000	$ 29,289,000	$ 30,838,000
Chargeoffs	218,000	859,000	837,000	1,047,000
Recoveries	72,000	6,000	261,000	12,000
Provision (Credit) for Credit Losses (Credit)	92,000	422,000	2,450,000	(35,000)
Allowance for credit losses, ending balance	34,051,000	29,768,000	34,051,000	29,768,000
Commercial And Industrial [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit losses, beginning balance	1,931,000	1,047,000	1,493,000	1,158,000
Chargeoffs	197,000	311,000	815,000	365,000
Recoveries	70,000	4,000	257,000	8,000
Provision (Credit) for Credit Losses (Credit)	(211,000)	461,000	902,000	400,000
Allowance for credit losses, ending balance	1,593,000	1,201,000	1,593,000	1,201,000
SBA Paycheck Protection Program [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Provision (Credit) for Credit Losses (Credit)	249,000		249,000
Allowance for credit losses, ending balance	249,000		249,000
Commercial Mortgages [Member] | Multifamily Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit losses, beginning balance	8,647,000	6,435,000	7,151,000	5,851,000
Provision (Credit) for Credit Losses (Credit)	209,000	295,000	646,000	879,000
Allowance for credit losses, ending balance	8,856,000	6,730,000	8,856,000	6,730,000
Commercial Mortgages [Member] | Other Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit losses, beginning balance	3,792,000	3,517,000	3,498,000	3,783,000
Provision (Credit) for Credit Losses (Credit)	68,000	(77,000)	409,000	(343,000)
Allowance for credit losses, ending balance	3,860,000	3,440,000	3,860,000	3,440,000
Commercial Mortgages [Member] | Owner-occupied Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit losses, beginning balance	1,782,000	685,000	921,000	743,000
Provision (Credit) for Credit Losses (Credit)	(160,000)	143,000	(77,000)	85,000
Allowance for credit losses, ending balance	1,622,000	828,000	1,622,000	828,000
Residential Mortgages [Member] | Closed-end [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit losses, beginning balance	17,459,000	18,071,000	15,698,000	18,844,000
Chargeoffs	19,000	299,000	19,000	433,000
Recoveries	2,000		2,000	1,000
Provision (Credit) for Credit Losses (Credit)	(58,000)	(624,000)	347,000	(1,264,000)
Allowance for credit losses, ending balance	17,384,000	17,148,000	17,384,000	17,148,000
Residential Mortgages [Member] | Revolving Home Equity [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit losses, beginning balance	487,000	402,000	515,000	410,000
Chargeoffs		249,000		249,000
Provision (Credit) for Credit Losses (Credit)	(5,000)	244,000	(27,000)	236,000
Allowance for credit losses, ending balance	482,000	397,000	482,000	397,000
Consumer And Other [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit losses, beginning balance	7,000	42,000	13,000	49,000
Chargeoffs	2,000		3,000
Recoveries		2,000	2,000	3,000
Provision (Credit) for Credit Losses (Credit)		(20,000)	1,000	(28,000)
Allowance for credit losses, ending balance	$ 5,000	$ 24,000	$ 5,000	$ 24,000