Loans Receivable and Allowance for Loan Losses (Narrative) (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) property	Sep. 30, 2022 USD ($)	Jun. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)	Jun. 30, 2022 USD ($)	Dec. 31, 2021 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Real Estate Acquired Through Foreclosure	$ 290,000		$ 290,000			$ 346,000
Financing Receivable, before Allowance for Credit Loss	1,611,278,000		1,611,278,000			1,474,424,000
Charge offs	2,384,000	$ 117,000	2,999,000	$ 386,000
Allowance for loan losses	16,086,000	16,931,000	16,086,000	16,931,000	$ 17,483,000	16,999,000	$ 17,017,000	$ 16,442,000
(Release of) Provision for credit losses	952,000		$ (482,000)	600,000
Single Property [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of property recognized write-down | property			1
Realizable Value Of Property Writedown			$ 54,000
Number Of Properties Under Foreclosure Proceedings | property			1
Mortgage Loans in Process of Foreclosure, Amount	290,000		$ 290,000
Multiple Properties [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number Of Properties Disposed By Sale | property			3
Proceeds from Sale of Mortgage Loans Held-for-sale			$ 292,000
Commercial Rentals [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Charge offs			6,000
Residential Rentals [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Charge offs			$ 44,000
Residential Real Estate Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number Of Properties Under Foreclosure Proceedings | property			3
Mortgage Loans in Process of Foreclosure, Amount	203,000		$ 203,000
Financing Receivable, before Allowance for Credit Loss	316,139,000		316,139,000			298,813,000
Charge offs			6,000	120,000
Allowance for loan losses	1,333,000	2,913,000	1,333,000	2,913,000	1,264,000	1,288,000	2,740,000	2,175,000
(Release of) Provision for credit losses	69,000	169,000	45,000	736,000
Residential Real Estate Loans [Member] | Hospitality Lodging Industry [Member] | Loans Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, before Allowance for Credit Loss	121,900,000		$ 121,900,000
Concentration Risk, Percentage			7.60%
Commercial Real Estate Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, before Allowance for Credit Loss	688,485,000		$ 688,485,000			651,544,000
Charge offs		1,000	154,000	1,000
Allowance for loan losses	9,989,000	8,603,000	9,989,000	8,603,000	$ 11,253,000	13,820,000	$ 9,155,000	$ 10,878,000
(Release of) Provision for credit losses	(1,267,000)	$ (551,000)	(3,689,000)	$ (2,354,000)
Commercial Real Estate Loans [Member] | Commercial Rentals [Member] | Loans Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, before Allowance for Credit Loss	146,400,000		$ 146,400,000
Concentration Risk, Percentage			9.10%
Minimum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Annual Loan Review threshold, amount			$ 1,500,000
Adoption Impact [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	$ 2,466,000		$ 2,466,000			2,466,000
Adoption Impact [Member] | Residential Real Estate Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses						(1,545,000)
Adoption Impact [Member] | Commercial Real Estate Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses						$ 5,527,000