Loans And The Allowance For Credit Losses (Narrative) (Details)	12 Months Ended
	Dec. 31, 2023 USD ($) item	Dec. 31, 2022 USD ($) item
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding principal balance	$ 800,000
Acquired credit-impaired loans		$ 700,000
Valuation allowances, acquired credit-impaired loans	0	0
Balance	1,720,946,000	1,672,369,000
Total criticized assets increase	$ 72,000,000	$ 93,000,000
Financing receivable modifications, experiencing financial difficulty, number of loans | item	0
Number of loan modifications | item		2
Principal balances on loan modification	$ 7,954,000
Residential Mortgages [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance	446,851,000
Residential Mortgages [Member] | Non-Accruing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Principal balances on loan modification	686,000
Residential Mortgages [Member] | Mortgages [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance	443,587,000	$ 439,708,000
Commercial Real Estate Mortgages [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance	969,861,000
Commercial Real Estate Mortgages [Member] | Non-Accruing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Principal balances on loan modification	6,817,000
Commercial Real Estate Mortgages [Member] | Mortgages [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance	854,869,000	779,677,000
Home Equities [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance	80,156,000
Principal balances on loan modification		38,000
Commercial And Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance	223,089,000	250,095,000
Amortized cost of loan	5,200,000
Principal balances on loan modification	451,000	461,000
Consumer And Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance	989,000	657,000
Overdrawn deposit accounts classified as loans	100,000	100,000
Total Real Estate Loans [Member] | Residential Mortgages [Member] | Mortgages [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan, Held-for-Sale, Fair Value Disclosure	$ 0	0
Maximum amount of loan as percentage of appraised value	80.00%
Loan servicing portfolio principal balance	$ 113,000,000	116,000,000
Mortgage servicing rights	1,100,000	1,100,000
Total Real Estate Loans [Member] | Residential Mortgages [Member] | FHLMC Loans [Member] | Mortgages [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage loans sold	0	0
Total Real Estate Loans [Member] | Residential Mortgages [Member] | FNMA Loans [Member] | Mortgages [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage loans sold	8,300,000	4,500,000
Realized Investment Gains (Losses)	100,000	200,000
Total Real Estate Loans [Member] | Home Equities [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance	80,156,000	80,948,000
Total Real Estate Loans [Member] | FHLBNY [Member] | Residential Mortgages [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance	566,000,000	495,000,000
Hotel Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total criticized assets increase	$ 19,000,000	$ 29,000,000
Minimum [Member] | Commercial And Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Rate re-pricing, period	3 years
Minimum [Member] | Total Real Estate Loans [Member] | Residential Mortgages [Member] | Mortgages [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan amortization period	10 years
Minimum [Member] | Total Real Estate Loans [Member] | Commercial Real Estate Mortgages [Member] | Mortgages [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage loans mature or subject to a rate call, period	3 years
Maximum [Member] | Commercial And Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan amortization period	5 years
Rate re-pricing, period	5 years
Maximum [Member] | Consumer And Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Repayment term	5 years
Maximum [Member] | Total Real Estate Loans [Member] | Residential Mortgages [Member] | Mortgages [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan amortization period	30 years
Maximum [Member] | Total Real Estate Loans [Member] | Commercial Real Estate Mortgages [Member] | Mortgages [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
LTV ratio	80.00%
Mortgage loans mature or subject to a rate call, period	5 years
Rate re-pricing, period	20 years