Reportable Segments (Schedule of Financial Data by Reporting Segment) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Segment Reporting Information [Line Items]
Net sales	$ 179,861	$ 183,147	$ 553,686	$ 567,775
Operating income	19,158	13,255	58,736	32,260
Other expense/(income), net	(1,864)	2,692	(4,464)	5,637
Income before income taxes	18,536	7,079	55,079	15,567
Machine Clothing [Member]
Segment Reporting Information [Line Items]
Net sales	157,891	162,864	494,788	507,809
Operating income	33,308	27,910	103,329	80,287
Engineered Composites [Member]
Segment Reporting Information [Line Items]
Net sales	21,970	20,283	58,898	59,966
Operating income	(2,765)	(3,951)	(9,785)	(13,032)
Corporate Expenses [Member]
Segment Reporting Information [Line Items]
Operating income	(11,385)	(10,704)	(34,808)	(34,995)
Significant Reconciling Items [Member]
Segment Reporting Information [Line Items]
Interest income	(527)	(351)	(1,079)	(951)
Interest expense	3,013	3,835	9,200	12,007
Other expense/(income), net	$ (1,864)	$ 2,692	$ (4,464)	$ 5,637