Goodwill and Identified Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2012

Summary of Goodwill and Identified Intangible Assets

The following is a summary of identified intangible assets (in thousands):

	December 31, 2012							December 31, 2011
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Identifiable intangibles:
Developed core technology	$	136,145	$	(102,449	)	$	33,696	$	136,145	$	(81,951	)	$	54,194
Customer relationships/contracts		67,098		(48,150	)		18,948		67,098		(42,142	)		24,956
Trademarks and tradenames		11,361		(9,145	)		2,216		11,361		(7,700	)		3,661
Maintenance agreements and related relationships		7,100		(3,513	)		3,587		7,100		(2,260	)		4,840
Total identifiable intangibles	$	221,704	$	(163,257	)	$	58,447	$	221,704	$	(134,053	)	$	87,651

Changes in Carrying Amount of Goodwill

The changes in the carrying amount of goodwill for the years ended December 31, 2012 and 2011 are as follows (in thousands):

	December 31,
	2012		2011
Balance at beginning of period	$	212,417	$	211,878
Adjustment to deferred tax liability associated with the acquisition of Omneon		—		(527	)
Adjustment to fixed assets associated with the acquisition of Omneon		—		298
Adjustment to income tax payable associated with the acquisition of Omneon		—		771
Foreign currency translation adjustment		101		(3	)
Total changes in goodwill	$	212,518	$	212,417

Estimated Future Amortization Expense of Purchased Intangible Assets

The estimated future amortization expense of purchased intangible assets with definite lives is as follows (in thousands):

	Cost of Revenue		Operating Expenses		Total
Year ended December 31,
2013	$	19,232	$	8,096	$	27,328
2014		13,745		6,775		20,520
2105		719		5,783		6,502
2016		—		4,097		4,097
2017		—		—		—
Total future amortization expense	$	33,696	$	24,751	$	58,447