Goodwill and Other Intangible Assets (Finite-lived intangible assets table) (Details) (USD $) In Thousands	Sep. 30, 2011	Dec. 31, 2010
Total identifiable intangible assets - Gross Carrying Amount	$ 127,529	$ 127,340
Total identifiable intangible assets - Accumulated Amortization	(66,279)	(61,270)
Total identifiable intangible assets - Net Carrying Amount	61,250	66,070
Patents [Member]
Total identifiable intangible assets - Gross Carrying Amount	41,325	41,237
Total identifiable intangible assets - Accumulated Amortization	(29,979)	(28,476)
Total identifiable intangible assets - Net Carrying Amount	11,346	12,761
Trademarks [Member]
Total identifiable intangible assets - Gross Carrying Amount	63,899	63,774
Total identifiable intangible assets - Accumulated Amortization	(29,253)	(27,764)
Total identifiable intangible assets - Net Carrying Amount	34,646	36,010
Customer Relationships Pipeline And Backlog [Member]
Total identifiable intangible assets - Gross Carrying Amount	22,305	22,329
Total identifiable intangible assets - Accumulated Amortization	(7,047)	(5,030)
Total identifiable intangible assets - Net Carrying Amount	$ 15,258	$ 17,299