Other (Income) Expense, Net (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Other Income Expense [Line Items]
Other (Income) expense, net	$ (2,317)	$ 3,045	$ (3,038)	$ 2,075
Gain on sale of assets [Member]
Other Income Expense [Line Items]
Other (Income) expense, net	(47)	(354)	(119)	(350)
Results of non-consolidated subsidiaries [Member]
Other Income Expense [Line Items]
Other (Income) expense, net	(3)	(183)	30	(209)
Foreign Currency Gain (Loss) [Member]
Other Income Expense [Line Items]
Other (Income) expense, net	352	(98)	(56)	(674)
Rents and royalties [Member]
Other Income Expense [Line Items]
Other (Income) expense, net	(153)	(107)	(281)	(242)
Return on pension assets and other pension costs [Member]
Other Income Expense [Line Items]
Other (Income) expense, net	(77)	(154)	(155)	(307)
Gain On Sale Of Business [Member]
Other Income Expense [Line Items]
Other (Income) expense, net	(1,012)	0	(1,012)	0
Curtailment [Member]
Other Income Expense [Line Items]
Other (Income) expense, net	0	0	0	(1,034)
Loss Recovery On Lease Abandonment [Member]
Other Income Expense [Line Items]
Other (Income) expense, net	0	626	0	626
Cost reduction and other charges [Member]
Other Income Expense [Line Items]
Other (Income) expense, net	0	2,789	0	3,943
Insurance Settlement [Member]
Other Income Expense [Line Items]
Other (Income) expense, net	(750)	0	(750)	0
Other, net [Member]
Other Income Expense [Line Items]
Other (Income) expense, net	$ (627)	$ 526	$ (695)	$ 322