Contingencies (Narrative) (Details) (USD $)	3 Months Ended
	Mar. 31, 2012 Asbestos Litigation [Member]	Apr. 25, 2012 Asbestos Litigation [Member] Claims	Dec. 31, 2011 Asbestos Litigation [Member] Claims	Dec. 31, 2010 Asbestos Litigation [Member] Claims	Dec. 31, 2009 Asbestos Litigation [Member] Claims	Dec. 31, 2008 Asbestos Litigation [Member] Claims	Dec. 31, 2007 Asbestos Litigation [Member] Claims	Dec. 31, 2006 Asbestos Litigation [Member] Claims	Dec. 31, 2005 Asbestos Litigation [Member] Claims	Dec. 31, 2004 Asbestos Litigation [Member] Claims	Apr. 25, 2012 Asbestos Litigation [Member] Brandon Drying Fabrics, Inc. [Member] Claims	Dec. 31, 2011 Asbestos Litigation [Member] Brandon Drying Fabrics, Inc. [Member] Claims	Dec. 31, 2010 Asbestos Litigation [Member] Brandon Drying Fabrics, Inc. [Member] Claims	Dec. 31, 2009 Asbestos Litigation [Member] Brandon Drying Fabrics, Inc. [Member] Claims	Dec. 31, 2008 Asbestos Litigation [Member] Brandon Drying Fabrics, Inc. [Member] Claims	Dec. 31, 2007 Asbestos Litigation [Member] Brandon Drying Fabrics, Inc. [Member] Claims	Dec. 31, 2006 Asbestos Litigation [Member] Brandon Drying Fabrics, Inc. [Member] Claims	Dec. 31, 2005 Asbestos Litigation [Member] Brandon Drying Fabrics, Inc. [Member] Claims	Dec. 31, 2004 Asbestos Litigation [Member] Brandon Drying Fabrics, Inc. [Member] Claims	Dec. 31, 2003 Asbestos Litigation [Member] Brandon Drying Fabrics, Inc. [Member]	Mar. 31, 2012 NAFTA Audits [Member] Audits	Mar. 31, 2012 NAFTA Audits [Member] Cancelled Litigation [Member] Audits	Mar. 31, 2012 NAFTA Audits [Member] Pending Litigation [Member] Audits
Loss Contingencies [Line Items]
Number of claims		4,440	4,446	5,170	8,945	18,385	18,798	19,416	24,451	29,411	7,874	7,877	7,869	7,907	8,664	8,740	9,114	9,566	9,985
Total resolved claims, by means of settlement or dismissal		36,320									9,725
Total cost of resolution		$ 8,628,500									$ 200,000
Resolution costs paid by insurance carrier		100.00%																	100.00%	88.20%
Confirmed insurance coverage	130,000,000
Percent of resolution costs paid by entity																				11.80%
Number of audits																					36	28	8
Amount of duties under examination																					2,500,000
Possible liability																					$ 4,000,000
Liability for duties, maximum, percent																					900.00%