Employee Benefit Plans - Post-retirement Healthcare Plan - Funded Status (Details) - Postretirement Healthcare Plan - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Change in benefit obligation:
Benefit obligation at beginning of year	$ 1,560,000	$ 1,807,000
Interest cost	40,000	42,000	$ 26,000
Actuarial gain	189,000	(53,000)
Benefits paid	(268,000)	(236,000)
Benefit obligation at end of year	1,521,000	1,560,000	$ 1,807,000
Change in plan assets:
Employer contributions	268,000	236,000
Benefits paid	(268,000)	(236,000)
Funded status at end of year	$ (1,521,000)	$ (1,560,000)
Defined Benefit Plan, Assumptions Used in Calculations [Abstract]
Discount rate	2.75%	2.39%	3.14%
Monthly cost of healthcare insurance per beneficiary	$ 415	$ 343	$ 370
Annual rate of increase in healthcare costs	5.00%	5.00%	4.00%
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets [Abstract]
Projected benefit obligation	$ 1,521,000	$ 1,560,000	$ 1,807,000
Accumulated benefit obligation	$ 1,521,000	$ 1,560,000