Reportable Segments (Schedule of Financial Data by Reporting Segment) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Segment Reporting Information [Line Items]
Net sales	$ 193,518	$ 197,974	$ 373,825	$ 384,628
Operating income/(loss)	18,977	(3,513)	39,578	19,005
Other expense/(income), net	(2,133)	2,211	(2,600)	2,945
Income before income taxes	18,393	(9,271)	36,543	8,488
Machine Clothing [Member]
Segment Reporting Information [Line Items]
Net sales	172,809	177,536	336,897	344,946
Operating income/(loss)	33,879	14,821	70,022	52,377
Engineered Composites [Member]
Segment Reporting Information [Line Items]
Net sales	20,709	20,438	36,928	39,682
Operating income/(loss)	(3,545)	(4,678)	(7,021)	(9,081)
Corporate Expenses [Member]
Segment Reporting Information [Line Items]
Operating income/(loss)	(11,357)	(13,656)	(23,423)	(24,291)
Significant Reconciling Items [Member]
Segment Reporting Information [Line Items]
Interest income	(356)	(300)	(552)	(600)
Interest expense	3,073	3,847	6,187	8,172
Other expense/(income), net	$ (2,133)	$ 2,211	$ (2,600)	$ 2,945