Segment Information (Schedule Of Operating Income, By Geographical Areas) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Schedule Of Operating Income By Major Geographic Areas [Line Items]
Operating income	$ 112,712	$ 128,313	$ 46,531
Americas [Member]
Schedule Of Operating Income By Major Geographic Areas [Line Items]
Operating income	55,140	71,339	46,816
Europe [Member]
Schedule Of Operating Income By Major Geographic Areas [Line Items]
Operating income	142,533	131,691	87,250
Asia Pacific [Member]
Schedule Of Operating Income By Major Geographic Areas [Line Items]
Operating income	114,110	83,432	45,439
Unallocated: Research And Development Expenses [Member]
Schedule Of Operating Income By Major Geographic Areas [Line Items]
Operating income	$ (199,071)	$ (158,149)	$ (132,974)