Identified Intangible Assets and Goodwill (Tables)

12 Months Ended

Dec. 31, 2011

Identified Intangible Assets and Goodwill [Abstract]

Identified intangible assets

	December 31,
	2011						2010
	Gross Carrying  Amount			Accumulated Amortization			Gross Carrying  Amount		Accumulated Amortization
	(In thousands)
Current technology	$	857,367		$	(702,500	)	$	1,033,189	$	(819,383	)
Customer base		402,739			(269,409	)		409,809		(241,705	)
Patent licensing		312,800			(167,728	)		312,800		(135,603	)
Workforce		3,567			(3,046	)		3,567		(2,450	)
Trade names		300			(300	)		550		(397	)
In-process research and development		—			—			760		—
Total identified intangible assets	$	1,576,773	(a)	$	(1,142,983	)(a)	$	1,760,675	$	(1,199,538	)

(a) Includes the effect of adjustments related to the exit of the ESG business, as disclosed in Note 17-Discontinued Operations.

Amortization expense and the weighted-average lives of identified intangible assets

	Weighted- Average  Lives		Year Ended December 31,
			2011		2010		2009
	(In months)		(In thousands)
Current technology		52	$	49,243	$	77,808	$	90,262
Customer base		45		33,921		36,440		38,123
Patent licensing		36		32,125		36,220		36,140
Workforce		72		596		596		596
Trade names		66		50		148		100
Non-compete agreements		34		—		—		61
Total		46	$	115,935	$	151,212	$	165,282

Estimated annual future amortization expenses related to identified intangible assets

	Amortization Expense
	(In thousands)
Years ending December 31:
2012	$	98,786
2013		90,804
2014		84,731
2015		78,822
2016 and thereafter		80,647
Total	$	433,790

Changes in the carrying amount of goodwill

	Goodwill
	(In thousands)
Balance as of December 31, 2010	$	188,698
Exit of the ESG business		(116,321	)
Balance as of December 31, 2011	$	72,377