Intangible Assets Gross Carrying Amount and Accumulated Amortization (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2012	Dec. 31, 2011
Intangible Assets [Line Items]
Gross Assets	$ 784,146	$ 783,140
Accumulated Amortization	(573,297)	(563,769)
Net	210,849	219,371
Gross Assets (including IPR&D)	784,146	802,540	778,759	749,194
Net (including IPR&D)	210,849	238,771
Core-developed technology [Member]
Intangible Assets [Line Items]
Gross Assets	420,055	407,024
Accumulated Amortization	(338,145)	(332,763)
Net	81,910	74,261
Customer contracts and relationships [Member]
Intangible Assets [Line Items]
Gross Assets	281,644	292,252
Accumulated Amortization	(159,231)	(154,890)
Net	122,413	137,362
Trademarks and trade names [Member]
Intangible Assets [Line Items]
Gross Assets	71,356	72,770
Accumulated Amortization	(64,897)	(65,090)
Net	6,459	7,680
Other [Member]
Intangible Assets [Line Items]
Gross Assets	11,091	11,094
Accumulated Amortization	(11,024)	(11,026)
Net	67	68
In-process research and development
Intangible Assets [Line Items]
In-process research and development	$ 0	$ 19,400