Retirement Benefit Plans (Details)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021
Net Periodic Benefit Cost [Line Items]
Interest credit under cash balance plan			0.03
Employer matching contribution, percentage			5.00%
Benefit obligation from lump sum payment to total benefit obligation ratio	7.91%		7.91%
Estimate effect of settlement to be recognized in net periodic cost	$ 550,000		$ 550,000
Forecast
Net Periodic Benefit Cost [Line Items]
Service cost and interest cost					$ 3,316,118
Unamortized net (gain) loss					$ 7,000,000
Employees' Pension Plan
Net Periodic Benefit Cost [Line Items]
Assumptions used calculating benefit obligation, interest rate to annuitize cash balance account						1.02%
Defined benefit plan, increase in benefit payable, percent	3.00%		3.00%
Defined benefit plan, benefit obligation, increase (decrease) for plan amendment			$ 351,638
Defined benefit plan, amortization of service cost			9 years 8 months 12 days
Service Cost	$ 469,000	$ 484,000	$ 1,408,000	$ 1,451,000
Interest Cost	360,000	340,000	1,079,000	1,023,000
Expected Return on Plan Assets	(1,078,000)	(945,000)	(3,235,000)	(2,835,000)
Amortization of Prior Service Cost	19,000	20,000	58,000	59,000
Amortization of Net Loss (Gain)	550,000	0	550,000	0
Net Periodic (Benefit) Cost	320,000	(101,000)	(140,000)	(302,000)
Plan Contributions During the Period	0	0	0	0
Estimated Future Contributions in the Current Fiscal Year	0		$ 0
Select Executive Retirement Plan
Net Periodic Benefit Cost [Line Items]
Assumptions used calculating benefit obligation, interest rate to annuitize cash balance account						2.72%
Defined benefit plan, amortization of service cost			12 years 6 months
Defined benefit plan, benefit obligation, period increase (decrease)			$ 122,797
Service Cost	208,000	146,000	626,000	437,000
Interest Cost	57,000	48,000	169,000	143,000
Expected Return on Plan Assets	0	0	0	0
Amortization of Prior Service Cost	11,000	12,000	33,000	36,000
Amortization of Net Loss (Gain)	53,000	44,000	159,000	134,000
Net Periodic (Benefit) Cost	329,000	250,000	987,000	750,000
Plan Contributions During the Period	116,000	118,000	347,000	354,000
Estimated Future Contributions in the Current Fiscal Year	116,000		116,000
Post-Retirement Benefit Plans
Net Periodic Benefit Cost [Line Items]
Assumptions used calculating benefit obligation, interest rate to annuitize cash balance account						3.08%
Service Cost	23,000	27,000	68,000	82,000
Interest Cost	61,000	62,000	185,000	186,000
Expected Return on Plan Assets	0	0	0	0
Amortization of Prior Service Cost	27,000	27,000	80,000	80,000
Amortization of Net Loss (Gain)	(39,000)	(22,000)	(117,000)	(66,000)
Net Periodic (Benefit) Cost	72,000	94,000	216,000	282,000
Plan Contributions During the Period	43,000	$ 32,000	131,000	$ 87,000
Estimated Future Contributions in the Current Fiscal Year	$ 43,000		$ 43,000
On or Subsequent to January 1, 2003
Net Periodic Benefit Cost [Line Items]
Service credits, percent of eligible salaries			6.00%
Minimum | Prior to January 1, 2003
Net Periodic Benefit Cost [Line Items]
Service credits, percent of eligible salaries			6.00%
Maximum | Prior to January 1, 2003
Net Periodic Benefit Cost [Line Items]
Service credits, percent of eligible salaries			12.00%