Supplemental Compensation Plans, Change in Benefit Obligation, Plan Assets, Funded Status and Amounts Recognized in Balance Sheets (Details) - Pension Plan [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Amounts recognized in the consolidated balance sheets consist of [Abstract]
Unrecognized net actuarial loss and prior service cost expected to be recognized in next fiscal year	$ 2
Salary Continuation Plan and SERP [Member]
Change in benefit obligation [Roll Forward]
Benefit obligation at beginning of year	6,581	$ 7,127
Service cost	278	312
Interest cost	175	168
Plan gain	(1,423)	(754)
Benefits paid	(272)	(272)
Benefit obligation at end of year	5,339	6,581
Change in plan assets [Abstract]
Employer contribution	272	272
Benefits paid	(272)	(272)
Fair value of plan assets at end of year	0	0
Reconciliation of funded status [Abstract]
Funded status	(5,339)	(6,581)
Unrecognized net plan loss (gain)	406	1,959
Unrecognized prior service cost	32	34
Net amount recognized	(4,901)	(4,588)
Amounts recognized in the consolidated balance sheets consist of [Abstract]
Accrued benefit liability	(5,339)	(6,581)
Accumulated other comprehensive (gain) loss	438	1,993
Net amount recognized	(4,901)	(4,588)
Directors' Retirement Plan [Member]
Change in benefit obligation [Roll Forward]
Benefit obligation at beginning of year	710	831
Service cost	0	0
Interest cost	14	10
Plan gain	(94)	(56)
Benefits paid	(70)	(75)
Benefit obligation at end of year	560	710
Change in plan assets [Abstract]
Employer contribution	70	75
Benefits paid	(70)	(75)
Fair value of plan assets at end of year	0	0
Reconciliation of funded status [Abstract]
Funded status	(560)	(710)
Unrecognized net plan loss (gain)	(76)	18
Net amount recognized	(636)	(692)
Amounts recognized in the consolidated balance sheets consist of [Abstract]
Accrued benefit liability	(560)	(710)
Accumulated other comprehensive (gain) loss	(76)	18
Net amount recognized	$ (636)	$ (692)