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Amortizable Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2012

Amortizable Intangible Assets and Goodwill

Components of intangible assets

				As of March 31, 2012
		Useful Life		Gross Carrying Amount			Accumulated Amortization			Net Carrying Amount
				(In thousands)
Patents		3 to 10 years		$	29,943		$	(13,965	)	$	15,978
Customer contracts and contractual relationships		1 to 10 years		32,650			(9,357		)	23,293
Existing technology		3 to 10 years		178,320			(22,913		)	155,407
Non-compete agreements		3 years		300			(83		)	217
Intellectual property		4 years		10,384			(10,384		)	—
Total intangible assets				$	251,597		$	(56,702	)	$	194,895

				As of December 31, 2011
		Useful Life		Gross Carrying Amount			Accumulated Amortization			Net Carrying Amount
				(In thousands)
Patents		3 to 10 years		$	28,643		$	(12,997	)	$	15,646
Customer contracts and contractual relationships		1 to 10 years		33,550			(7,148		)	26,402
Existing technology		3 to 7 years		159,350			(19,685		)	139,665
Non-compete agreements		3 years		400			(158		)	242
Intellectual property		4 years		10,384			(10,384		)	—
Total intangible assets				$	232,327		$	(50,372	)	$	181,955

Estimated future amortization expense of intangible assets

Years Ending December 31:		Amount
2012 (remaining 9 months)		$	27,545
2013		34,835
2014		30,694
2015		30,044
2016		29,089
Thereafter		42,688
		$	194,895

Schedule of changes in carrying amount of goodwill by reporting unit

		December 31,			Addition to			March 31,
Reportable Segment:		2011			Goodwill (1)			2012
		(In thousands)
SBG		$	4,454		$	15,451		$	19,905
All Other		110,694			8,070			118,764
Total		$	115,148		$	23,521		$	138,669

(1) The addition to goodwill resulted from two business combinations in the first quarter of 2012. See Note 4, “Acquisitions” for further details.

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Tabular disclosure of the estimated aggregate amortization expense for intangible assets subject to amortization for each of the five succeeding fiscal years.

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Tabular disclosure of amortizable intangibles assets, in total and by major class, including the gross carrying amount and accumulated amortization. A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company.

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Tabular disclosure of goodwill by reportable segment and in total. Disclosure details may include, but are not limited to, the carrying amount of goodwill, goodwill acquired during the year, goodwill impairment losses recognized, goodwill written-off due to the sale of a business unit, goodwill not yet allocated, and any other changes to goodwill.

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