Retirement Agreements and Other Postretirement Benefit Plan Development of the Accumulated Postretirement Benefit Obligation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Accrued postretirement benefit obligation at beginning of year	$ (1,118)	$ (1,089)
Service cost – benefits earned during the year	0	0
Interest cost on projected benefit obligation	(26)	(29)
Actuarial gain	216	0
Accrued postretirement benefit obligation at end of year	$ (928)	$ (1,118)