Retirement Agreements And Other Postretirement Benefits (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Retirement Benefits [Abstract]
Liability for employee benefits and other payments	$ 14,200		$ 13,400
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the year	0	$ 0
Interest cost on the projected benefit obligation	6	7
Amortization of unrecognized losses	0	0
Net periodic benefits costs	$ 6	$ 7