Pension and Retirement Benefit Plans (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Retirement Plan [Member]
Pension and Retirement Benefit Plans (Details) [Line Items]
Projected benefit obligation, amount					$ 23,800,000
Fair value of plan assets					20,000,000
Underfunded amount					3,800,000
Retirement plan’s net periodic benefit	$ 8,000
Expected return on plan assets	273,000	$ 238,000	$ 819,000	$ 714,000
Interest cost	164,000	151,000	492,000	453,000
Service cost	101,000	109,000	303,000	327,000
Net periodic expense (income)		(22,000)	24,000	66,000
Postretirement Plan [Member]
Pension and Retirement Benefit Plans (Details) [Line Items]
Projected benefit obligation, amount					$ 4,300,000
Interest cost	26,000	10,000	78,000	30,000
Service cost	6,000	26,000	18,000	78,000
Net periodic expense (income)	$ 32,000	42,000	$ 96,000	126,000
Amortization expense		$ 6,000		$ 18,000