Goodwill and Identified Intangible Assets (Tables)

3 Months Ended

Mar. 29, 2013

Goodwill And Intangible Assets Disclosure [Abstract]

Changes in Carrying Amount of Goodwill

The changes in the carrying amount of goodwill for the three months ended March 29, 2013 are as follows (in thousands):

Balance at beginning of period	$	212,518
Reduction in goodwill associated with the sale of the cable access HFC Business		(14,547	)
Foreign currency translation adjustment		(151	)
Balance at end of period	$	197,820

Summary of Goodwill and Identified Intangible Assets

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

	March 29, 2013							December 31, 2012
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Identifiable intangibles:
Developed core technology	$	136,145	$	(107,394	)	$	28,751	$	136,145	$	(102,449	)	$	33,696
Customer relationships/contracts		67,098		(49,580	)		17,518		67,098		(48,150	)		18,948
Trademarks and tradenames		11,361		(9,500	)		1,861		11,361		(9,145	)		2,216
Maintenance agreements and related relationships		7,100		(3,816	)		3,284		7,100		(3,513	)		3,587
Total identifiable intangibles	$	221,704	$	(170,290	)	$	51,414	$	221,704	$	(163,257	)	$	58,447

Amortization Expense for Identifiable Purchased Intangible Assets

Amortization expense for the identifiable purchased intangible assets for the three months ended March 29, 2013 and March 30, 2012 was allocated as follows (in thousands):

	Three months ended
	March 29, 2013		March 30, 2012
Included in cost of revenue	$	4,945	$	5,360
Included in operating expenses		2,088		2,179
Total amortization expense	$	7,033	$	7,539

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 (remaining 9 months)	$	14,288	$	6,008	$	20,296
2014		13,745		6,775		20,520
2105		719		5,783		6,502
2016		—		4,096		4,096
2017		—		—		—
Total future amortization expense	$	28,752	$	22,662	$	51,414