Reportable Segments (Schedule of Restructuring Costs by Reporting Segment) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Restructuring expense
Restructuring expense	$ 1,182	$ 636
Machine Clothing [Member]
Restructuring expense
Restructuring expense	862	193
Engineered Composites [Member]
Restructuring expense
Restructuring expense	$ 320	$ 443