Intangible Assets Gross Carrying Amount and Accumulated Amortization (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Dec. 31, 2011
Intangible Assets [Line Items]
Gross Assets	$ 798,040	$ 783,140
Accumulated Amortization	(593,410)	(563,769)
Net	204,630	219,371
Gross Assets (including IPR&D)	798,040	802,540	793,814	749,194
Net (including IPR&D)	204,630	238,771
Core-developed technology [Member]
Intangible Assets [Line Items]
Gross Assets	426,043	407,024
Accumulated Amortization	(348,292)	(332,763)
Net	77,751	74,261
Customer contracts and relationships [Member]
Intangible Assets [Line Items]
Gross Assets	288,347	292,252
Accumulated Amortization	(167,650)	(154,890)
Net	120,697	137,362
Trademarks and trade names [Member]
Intangible Assets [Line Items]
Gross Assets	72,559	72,770
Accumulated Amortization	(66,445)	(65,090)
Net	6,114	7,680
Other [Member]
Intangible Assets [Line Items]
Gross Assets	11,091	11,094
Accumulated Amortization	(11,023)	(11,026)
Net	68	68
In-process research and development
Intangible Assets [Line Items]
In-process research and development	$ 0	$ 19,400