Goodwill and Identified Intangible Assets (Tables)

9 Months Ended

Oct. 02, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

The following table presents goodwill by reportable segments (in thousands):



	Video			Cable Edge			Total
As of December 31, 2014	$	136,975		$	60,909		$	197,884
Foreign currency translation adjustment	(41		)	(18		)	(59		)
As of October 2, 2015	$	136,934		$	60,891		$	197,825

Summary of Goodwill and Identified Intangible Assets

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



		October 2, 2015							December 31, 2014
	Range of Useful Lives	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Identifiable intangibles:
Developed core technology	4-6 years	$	136,145	$	(136,059	)	$	86	$	136,145	$	(135,426	)	$	719
Customer relationships/contracts	5-6 years	67,098		(62,434		)	4,664		67,098		(58,784		)	8,314
Maintenance agreements and related relationships	6-7 years	7,100		(6,222		)	878		7,100		(5,534		)	1,566
Total identifiable intangibles		$	210,343	$	(204,715	)	$	5,628	$	210,343	$	(199,744	)	$	10,599

Amortization Expense for Identifiable Purchased Intangible Assets

Amortization expense for the identifiable purchased intangible assets for the three and nine months ended October 2, 2015 and September 26, 2014 was allocated as follows (in thousands):



	Three months ended				Nine months ended
	October 2, 2015		September 26, 2014		October 2, 2015		September 26, 2014
Included in cost of revenue	$	86	$	3,851	$	633	$	13,049
Included in operating expenses	1,446		1,661		4,338		5,329
Total amortization expense	$	1,532	$	5,512	$	4,971	$	18,378

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,
2015 (remaining three months)	$	86	$	1,446	$	1,532
2016	—		4,096		4,096
Total future amortization expense	$	86	$	5,542	$	5,628