Goodwill And Other Intangible Assets (Schedule Of Intangible Assets Subject To Amortization) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Finite-Lived Intangible Assets [Line Items]
Intangible assets subject to amortization, beginning balance	$ 220,237	$ 307,735
Intangible assets recognized during the year	5,181
Amortization during the year	(70,364)	(69,513)	(74,055)
Currency translation during the year	(386)	(17,985)
Intangible assets subject to amortization, ending balance	154,668	220,237	307,735
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets subject to amortization, beginning balance	106,432	159,302
Intangible assets recognized during the year	5,181
Amortization during the year	(47,460)	(45,679)
Currency translation during the year	805	(7,191)
Intangible assets subject to amortization, ending balance	64,958	106,432
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets subject to amortization, beginning balance	112,520	147,008
Amortization during the year	(22,782)	(23,714)
Currency translation during the year	(1,194)	(10,774)
Intangible assets subject to amortization, ending balance	88,544	112,520
Other [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets subject to amortization, beginning balance	1,285	1,425
Amortization during the year	(122)	(120)
Currency translation during the year	3	(20)
Intangible assets subject to amortization, ending balance	$ 1,166	$ 1,285