Pensions and Other Postretirement Benefits (Narrative) (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]
Defined benefit plan, employer contribution in 2022	$ 1,300
Ultimate health care cost trend rate	3.94%
Defined contribution plan matching expense	$ 1,000	$ 800	$ 700
Accrued pension and other postretirement costs	12,253	16,687
Other Retirement Obligations
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Actuarial gains adjustment	$ 591	$ 1,498
Ultimate health care cost trend rate	6.00%	5.40%
Other retirement obligations	$ 1,000	$ 1,000
Accrued pension and other postretirement costs	2,658	3,311
Other Retirement Obligations | Revision of Prior Period, Adjustment
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Actuarial gains adjustment		763
United States | Pension Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Actuarial gains adjustment	103	(338)
Accrued pension and other postretirement costs	2,519	2,642
Foreign Plan | Pension Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Actuarial gains adjustment	792	(1,863)
Accrued pension and other postretirement costs	6,065	9,691
Nonqualified Plan | Deferred Compensation, Excluding Share-based Payments and Retirement Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Assets held-in-trust	4,200	3,700
Accrued pension and other postretirement costs	6,000	5,400
Unfunded Plan | Nonqualified Plan | United States | Pension Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Assets held-in-trust	1,900	1,900
Non qualified pension plan liabilities	$ 2,600	$ 2,700