Segment and Geographical Information Narrative (Details)	12 Months Ended
	Dec. 31, 2013 NmbrCustsomers segment product_line	Dec. 31, 2012 segment NmbrCustsomers	Dec. 31, 2011 NmbrCustsomers
Segment Reporting Information [Line Items]
Segment Reporting - Number of Major Customers	2	4	3
Number of reportable segments	3	4
Number of product lines	2
Customer 1 [Member] | Performance Fibers Segment [Member]
Segment Reporting Information [Line Items]
Concentration risk percentage	13.00%	15.00%	15.00%
Customer 2 [Member] | Performance Fibers Segment [Member]
Segment Reporting Information [Line Items]
Concentration risk percentage	11.00%	12.00%	11.00%
Customer 3 [Member] | Performance Fibers Segment [Member]
Segment Reporting Information [Line Items]
Concentration risk percentage		10.00%	11.00%
Customer 4 [Member] | Performance Fibers Segment [Member]
Segment Reporting Information [Line Items]
Concentration risk percentage		10.00%