Retirement Agreements and Other Postretirement Benefit Plan Development of the Accumulated Postretirement Benefit Obligation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Accrued postretirement benefit obligation at beginning of year	$ (1,089)	$ (956)
Service cost – benefits earned during the year	0	0
Interest cost on projected benefit obligation	(29)	(31)
Actuarial loss	0	(102)
Accrued postretirement benefit obligation at end of year	$ (1,118)	$ (1,089)