Reportable Segments (Schedule of Financial Data by Reporting Segment) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Segment Reporting Information [Line Items]
Net sales	$ 180,307	$ 186,654
Operating income/(loss)	20,601	22,518
Other expense/(income), net	(467)	734
Income before income taxes	18,150	17,759
Machine Clothing [Member]
Segment Reporting Information [Line Items]
Net sales	164,088	167,409
Operating income/(loss)	36,142	37,556
Engineered Composites [Member]
Segment Reporting Information [Line Items]
Net sales	16,219	19,245
Operating income/(loss)	(3,475)	(4,403)
Corporate Expenses [Member]
Segment Reporting Information [Line Items]
Operating income/(loss)	(12,066)	(10,635)
Significant Reconciling Items [Member]
Segment Reporting Information [Line Items]
Interest income	(196)	(299)
Interest expense	3,114	4,324
Other expense/(income), net	$ (467)	$ 734