Reportable Segments (Schedule of Financial Data by Reporting Segment) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Segment Reporting Information [Line Items]
Net sales	$ 172,289	$ 193,518	$ 353,613	$ 373,825
Operating income	3,038	18,977	23,187	39,578
Other expense/(income), net	2,820	(2,133)	(465)	(2,600)
Income/(loss) before income taxes	(2,484)	18,393	18,274	36,543
Machine Clothing [Member]
Segment Reporting Information [Line Items]
Net sales	150,561	172,809	309,055	336,897
Operating income	33,323	33,879	69,013	70,022
Engineered Composites [Member]
Segment Reporting Information [Line Items]
Net sales	21,728	20,709	44,558	36,928
Operating income	(18,633)	(3,545)	(22,444)	(7,021)
Corporate Expenses [Member]
Segment Reporting Information [Line Items]
Operating income	(11,652)	(11,357)	(23,382)	(23,423)
Significant Reconciling Items [Member]
Segment Reporting Information [Line Items]
Interest income	(437)	(356)	(777)	(552)
Interest expense	3,139	3,073	6,155	6,187
Other expense/(income), net	$ 2,820	$ (2,133)	$ (465)	$ (2,600)