Reportable Segments and Geographic Data (Schedule of Restructuring Costs by Reporting Segment) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Restructuring expenses, net
Charges/ (reversals)	$ 15,570	$ 13,491	$ 8,488
Machine Clothing [Member]
Restructuring expenses, net
Charges/ (reversals)	12,278	3,429	6,181
Engineered Composites [Member]
Restructuring expenses, net
Charges/ (reversals)	3,048	10,062	2,314
Corporate Expenses [Member]
Restructuring expenses, net
Charges/ (reversals)	$ 244		$ (7)