Goodwill and Identified Intangible Assets (Tables)

6 Months Ended

Jun. 28, 2013

Goodwill And Intangible Assets Disclosure [Abstract]

Changes in Carrying Amount of Goodwill

The changes in the carrying amount of goodwill for the six months ended June 28, 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		(114	)
Balance at end of period	$	197,857

Summary of Goodwill and Identified Intangible Assets

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

	June 28, 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	$	(112,156	)	$	23,988	$	136,145	$	(102,449	)	$	33,696
Customer relationships/contracts		67,098		(50,984	)		16,114		67,098		(48,150	)		18,948
Trademarks and tradenames		11,361		(9,855	)		1,506		11,361		(9,145	)		2,216
Maintenance agreements and related relationships		7,100		(4,066	)		3,034		7,100		(3,513	)		3,587
Total identifiable intangibles	$	221,704	$	(177,061	)	$	44,642	$	221,704	$	(163,257	)	$	58,447

Amortization Expense for Identifiable Purchased Intangible Assets

Amortization expense for the identifiable purchased intangible assets for the three and six months ended June 28, 2013 and June 29, 2012 was allocated as follows (in thousands):

	Three months ended				Six months ended
	June 28, 2013		June 29, 2012		June 28, 2013		June 29, 2012
Included in cost of revenue	$	4,762	$	5,048	$	9,707	$	10,408
Included in operating expenses		2,010		2,190		4,098		4,369
Total amortization expense	$	6,772	$	7,238	$	13,805	$	14,777

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 6 months)	$	9,525	$	3,999	$	13,524
2014		13,745		6,775		20,520
2015		719		5,783		6,502
2016		—		4,096		4,096
2017		—		—		—
Total future amortization expense	$	23,989	$	20,653	$	44,642