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, 2021	Dec. 31, 2020
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	$ 132
Salary Continuation Plan and SERP [Member]
Change in benefit obligation [Roll Forward]
Benefit obligation at beginning of year	7,127	$ 5,871
Service cost	312	256
Interest cost	168	180
Plan (gain) loss	(754)	1,092
Benefits paid	(272)	(272)
Benefit obligation at end of year	6,581	7,127
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	(6,581)	(7,127)
Unrecognized net plan loss (gain)	1,959	2,919
Unrecognized prior service cost	34	35
Net amount recognized	(4,588)	(4,173)
Amounts recognized in the consolidated balance sheets consist of [Abstract]
Accrued benefit liability	(6,581)	(7,127)
Accumulated other comprehensive loss	1,993	2,954
Net amount recognized	(4,588)	(4,173)
Directors' Retirement Plan [Member]
Change in benefit obligation [Roll Forward]
Benefit obligation at beginning of year	831	820
Service cost	0	0
Interest cost	10	19
Plan (gain) loss	(56)	52
Benefits paid	(75)	(60)
Benefit obligation at end of year	710	831
Change in plan assets [Abstract]
Employer contribution	75	60
Benefits paid	(75)	(60)
Fair value of plan assets at end of year	0	0
Reconciliation of funded status [Abstract]
Funded status	(710)	(831)
Unrecognized net plan loss (gain)	18	74
Net amount recognized	(692)	(757)
Amounts recognized in the consolidated balance sheets consist of [Abstract]
Accrued benefit liability	(710)	(831)
Accumulated other comprehensive loss	18	74
Net amount recognized	$ (692)	$ (757)