Identified Intangible Assets and Goodwill (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Identified intangible assets
Gross Carrying Amount	$ 1,576,773	$ 1,760,675
Accumulated Amortization	(1,142,983)	(1,199,538)
Current technology [Member]
Identified intangible assets
Gross Carrying Amount	857,367	1,033,189
Accumulated Amortization	(702,500)	(819,383)
Customer base [Member]
Identified intangible assets
Gross Carrying Amount	402,739	409,809
Accumulated Amortization	(269,409)	(241,705)
Patent licensing [Member]
Identified intangible assets
Gross Carrying Amount	312,800	312,800
Accumulated Amortization	(167,728)	(135,603)
Workforce [Member]
Identified intangible assets
Gross Carrying Amount	3,567	3,567
Accumulated Amortization	(3,046)	(2,450)
Trade names [Member]
Identified intangible assets
Gross Carrying Amount	300	550
Accumulated Amortization	(300)	(397)
In-process research and development [Member]
Identified intangible assets
Gross Carrying Amount	0	760
Accumulated Amortization	$ 0	$ 0