Pension and Other Postretirement Benefit Plans Components of Net Periodic Pension Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Retirement Benefits [Abstract]
Service cost			$ 755
Interest cost	$ 323	$ 679	1,027
Expected return on plan assets	(306)	(634)	(914)
Administrative charges			17
Curtailment		(1,049)	(2,621)
Prior service cost			(848)
Net actuarial loss			3,171
Net periodic pension cost	$ 17	$ (1,004)	$ 587