Fair Value of Financial Instruments (Narrative) (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022	Jun. 30, 2023	Jan. 01, 2023
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Gains or losses included in earnings attributable to the change in realized/unrealized gains or losses related to the assets	$ 0	$ 0	$ 0	$ 0
Credit loss expense - loans		$ (108,000)		$ 97,000
Nonaccrual loans					$ 3,495,000
Allowance for loan losses	(17,146,000)		(17,146,000)			$ (16,905,000)	$ (16,702,000)
Loans	1,380,019,000		1,380,019,000
Impaired Loans with No Specific Allowance: Recorded Investment	2,314,000		2,314,000
Financing receivables minimum benchmark for evaluation for specific reserves	100,000		100,000
Financing receivable individually evaluated with no allowance carrying value	$ 2,300,000		$ 2,300,000
Partial Charge Off [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Nonaccrual loans					100,000
Troubled Debt Restructuring [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Credit loss expense - loans					1,300,000
Allowance for loan losses					(400,000)
Impaired Loans with Specific Allowance: Recorded Investment					1,000,000.0
Impaired Loans with Specific Allowance: Related Allowance					$ 64,700