Pensions and Other Postretirement Benefit Plans (Schedule of Plan Assets) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	$ 9,400
Pension plans
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, beginning of year	239,051	$ 211,755
Actual return on plan assets, net of expenses	(2,648)	28,477
Employer contributions	2,431	3,219
Plan participants' contributions	175	198
Benefits paid	(9,399)	(8,123)
Settlements	(3,694)	(737)
Foreign currency changes	(589)	4,262
Fair value of plan assets, end of year	225,327	239,051
Other postretirement benefits
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, beginning of year	0	0
Actual return on plan assets, net of expenses	0	0
Employer contributions	3,338	3,555
Plan participants' contributions	0	0
Benefits paid	(3,338)	(3,555)
Settlements	0	0
Foreign currency changes	0	0
Fair value of plan assets, end of year	$ 0	$ 0