Goodwill and Identified Intangible Assets (Tables)

6 Months Ended

Jun. 30, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

The changes in the carrying amount of goodwill by reportable segments for the six months ended June 30, 2017 were as follows (in thousands):



	Video		Cable Edge		Total
Balance as of December 31, 2016	$	176,519	$	60,760	$	237,279
Foreign currency translation adjustment	3,261		30		3,291
Balance as of June 30, 2017	$	179,780	$	60,790	$	240,570

Summary of Goodwill and Identified Intangible Assets

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



		June 30, 2017							December 31, 2016
	Weighted Average Remaining Life (Years)	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Developed core technology	2.7	$	31,708	$	(17,807	)	$	13,901	$	31,707	$	(15,216	)	$	16,491
Customer relationships/contracts	3.7	44,643		(33,641		)	11,002		44,384		(32,098		)	12,286
Trademarks and trade names	2.7	621		(207		)	414		573		(119		)	454
Maintenance agreements and related relationships	N/A	5,500		(5,500		)	—		5,500		(5,500		)	—
Order Backlog	N/A	3,011		(3,011		)	—		3,011		(3,011		)	—
Total identifiable intangibles		$	85,483	$	(60,166	)	$	25,317	$	85,175	$	(55,944	)	$	29,231

Amortization Expense for Identifiable Purchased Intangible Assets

Amortization expense for the identifiable purchased intangible assets for the three and six months ended June 30, 2017 and July 1, 2016 was allocated as follows (in thousands):



	Three months ended				Six months ended
	June 30, 2017		July 1, 2016		June 30, 2017		July 1, 2016
Included in cost of revenue	$	1,295	$	1,307	$	2,590	$	1,725
Included in operating expenses	780		4,232		1,554		6,597
Total amortization expense	$	2,075	$	5,539	$	4,144	$	8,322

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,
2017 (remaining six months)	$	2,590	$	1,578	$	4,168
2018	5,180		3,156		8,336
2019	5,180		3,156		8,336
2020	951		3,026		3,977
2021	—		500		500
Total future amortization expense	$	13,901	$	11,416	$	25,317