Goodwill and Identified Intangible Assets (Tables)

9 Months Ended

Sep. 27, 2013

Goodwill and Intangible Assets Disclosure [Abstract]

The changes in the carrying amount of goodwill for the nine months ended September 27, 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	(15		)
Balance at end of period	$	197,956

Summary of Goodwill and Identified Intangible Assets

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



	September 27, 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	$	(116,918	)	$	19,227	$	136,145	$	(102,449	)	$	33,696
Customer relationships/contracts	67,098		(52,381		)	14,717		67,098		(48,150		)	18,948
Trademarks and tradenames	11,361		(10,210		)	1,151		11,361		(9,145		)	2,216
Maintenance agreements and related relationships	7,100		(4,317		)	2,783		7,100		(3,513		)	3,587
Total identifiable intangibles	$	221,704	$	(183,826	)	$	37,878	$	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 nine months ended September 27, 2013 and September 28, 2012 was allocated as follows (in thousands):



	Three months ended				Nine months ended
	September 27, 2013		September 28, 2012		September 27, 2013		September 28, 2012
Included in cost of revenue	$	4,763	$	5,048	$	14,470	$	15,456
Included in operating expenses	2,001		2,179		6,099		6,548
Total amortization expense	$	6,764	$	7,227	$	20,569	$	22,004

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 3 months)	$	4,763	$	1,997	$	6,760
2014	13,745		6,775		20,520
2015	719		5,783		6,502
2016	—		4,096		4,096
2017	—		—		—
Total future amortization expense	$	19,227	$	18,651	$	37,878