Reportable Segments and Geographic Data (Schedule of Restructuring Costs by Reporting Segment) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Restructuring expenses, net
Charges/ (reversals)	$ 2,905	$ 15,570	$ 13,491
Machine Clothing [Member]
Restructuring expenses, net
Charges/ (reversals)	1,129	12,278	3,429
Engineered Composites [Member]
Restructuring expenses, net
Charges/ (reversals)	1,833	3,048	10,062
Corporate Expenses [Member]
Restructuring expenses, net
Charges/ (reversals)	$ (57)	$ 244