Defined Benefit Pension Plans Components of Pension Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service costs--increase in benefit obligation earned	$ 0	$ 0	$ 75
Interest cost on projected benefit obligation	85	105	198
Expected return on plan assets	0	0	(59)
Settlement loss	0	0	1,677
Amortization of net actuarial loss	137	89	87
Amortization of prior service cost	64	64	64
Net pension expense of defined benefit pension plans	$ 286	$ 258	$ 2,042