Restructuring (Schedule of Restructuring Charges) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Restructuring and other, net
Restructuring and other	$ 7,061	$ 9,317	$ 3,747
Termination and Other Costs [Member]
Restructuring and other, net
Restructuring and other	7,766	7,371	3,697
Impairment of Plant and Equipment [Member]
Restructuring and other, net
Restructuring and other	(705)	1,750	1,243
Benefit Plan Curtailment/ Settlement [Member]
Restructuring and other, net
Restructuring and other		196	(1,193)
Machine Clothing [Member]
Restructuring and other, net
Restructuring and other	7,386	5,680	4,762
Machine Clothing [Member] | Termination and Other Costs [Member]
Restructuring and other, net
Restructuring and other	7,386	5,484	2,767
Machine Clothing [Member] | Impairment of Plant and Equipment [Member]
Restructuring and other, net
Restructuring and other			1,243
Machine Clothing [Member] | Benefit Plan Curtailment/ Settlement [Member]
Restructuring and other, net
Restructuring and other		196	752
Engineered Composites [Member]
Restructuring and other, net
Restructuring and other		57	930
Engineered Composites [Member] | Termination and Other Costs [Member]
Restructuring and other, net
Restructuring and other		57	930
Engineered Composites [Member] | Impairment of Plant and Equipment [Member]
Restructuring and other, net
Restructuring and other
Engineered Composites [Member] | Benefit Plan Curtailment/ Settlement [Member]
Restructuring and other, net
Restructuring and other
Unallocated Expenses [Member]
Restructuring and other, net
Restructuring and other	(325)	3,580	(1,945)
Unallocated Expenses [Member] | Termination and Other Costs [Member]
Restructuring and other, net
Restructuring and other	380	1,830
Unallocated Expenses [Member] | Impairment of Plant and Equipment [Member]
Restructuring and other, net
Restructuring and other	(705)	1,750
Unallocated Expenses [Member] | Benefit Plan Curtailment/ Settlement [Member]
Restructuring and other, net
Restructuring and other			$ (1,945)