Reportable Segments (Schedule of Financial Data by Reporting Segment) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Segment Reporting Information [Line Items]
Net sales	$ 178,789	$ 179,861	$ 532,402	$ 553,686
Operating income	25,843	19,158	49,030	58,736
Other expense/(income), net	1,249	(1,864)	784	(4,464)
Income before income taxes	21,923	18,536	40,197	55,079
Machine Clothing [Member]
Segment Reporting Information [Line Items]
Net sales	154,522	157,891	463,577	494,788
Operating income	41,956	33,308	110,969	103,329
Engineered Composites [Member]
Segment Reporting Information [Line Items]
Net sales	24,267	21,970	68,825	58,898
Operating income	(4,191)	(2,765)	(26,635)	(9,785)
Corporate Expenses [Member]
Segment Reporting Information [Line Items]
Operating income	(11,922)	(11,385)	(35,304)	(34,808)
Significant Reconciling Items [Member]
Segment Reporting Information [Line Items]
Interest income	(428)	(527)	(1,205)	(1,079)
Interest expense	3,099	3,013	9,254	9,200
Other expense/(income), net	$ 1,249	$ (1,864)	$ 784	$ (4,464)