Supplemental Compensation Plans, Components of Net Periodic Benefit Cost and Additional Information (Details) - Pension Plan [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Salary Continuation Plan and SERP [Member]
Components of net periodic benefit cost [Abstract]
Service cost	$ 138	$ 158
Interest cost	258	263
Amortization of prior service cost	2	2
Recognized actuarial loss	0	0
Net periodic benefit cost	398	423
Additional Information [Abstract]
Minimum benefit obligation at year end	4,500	4,979	$ 5,339
Decrease in minimum liability included in other comprehensive loss	(393)	(338)
Directors' Retirement Plan [Member]
Components of net periodic benefit cost [Abstract]
Service cost	0	0
Interest cost	20	24
Recognized actuarial loss	(33)	(4)
Net periodic benefit cost	(13)	20
Additional Information [Abstract]
Minimum benefit obligation at year end	397	424	$ 560
Decrease in minimum liability included in other comprehensive loss	$ 30	$ (96)