Goodwill and Identified Intangible Assets (Tables)

3 Months Ended

Apr. 01, 2016

Goodwill and Intangible Assets Disclosure [Abstract]

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



	Video		Cable Edge			Total
As of December 31, 2015	$	136,904	$	60,877		$	197,781
Preliminary estimate of goodwill from TVN acquisition	39,206		—			39,206
Foreign currency translation adjustment	933		(21		)	912
As of April 1, 2016	$	177,043	$	60,856		$	237,899

Summary of Goodwill and Identified Intangible Assets

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



		April 1, 2016							December 31, 2015
	Weighted Average Remaining Life (Years)	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Developed core technology	3.9	$	31,488	$	(11,416	)	$	20,072	$	10,987	$	(10,987	)	$	—
Customer relationships/contracts	4.4	48,164		(27,286		)	20,878		29,200		(25,752		)	3,448
Trademarks and trade names	3.9	605		(13		)	592		—		—			—
Maintenance agreements and related relationships	0.5	5,500		(5,080		)	420		5,500		(4,851		)	649
Order Backlog	0.4	3,690		(615		)	3,075		—		—			—
In-process R&D	n/a	1,005		—			1,005		—		—			—
Total identifiable intangibles		$	90,452	$	(44,410	)	$	46,042	$	45,687	$	(41,590	)	$	4,097

Amortization Expense for Identifiable Purchased Intangible Assets

Amortization expense for the identifiable purchased intangible assets for the three months ended April 1, 2016 and April 3, 2015 was allocated as follows (in thousands):



	Three months ended
	April 1, 2016		April 3, 2015
Included in cost of revenue	$	418	$	461
Included in operating expenses	2,365		1,446
Total amortization expense	$	2,783	$	1,907

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,
2016 (remaining nine months)	$	3,844	$	8,747	$	12,591
2017	5,125		4,195		9,320
2018	5,125		4,195		9,320
2019	5,125		4,195		9,320
2020	854		4,006		4,860
Thereafter	—		631		631
Total future amortization expense	$	20,073	$	25,969	$	46,042