Goodwill and Identified Intangible Assets (Tables)

9 Months Ended

Sep. 29, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

The changes in the carrying amount of goodwill by reportable segments for the nine months ended September 29, 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	4,603		50		4,653
Balance as of September 29, 2017	$	181,122	$	60,810	$	241,932

Summary of Goodwill and Identified Intangible Assets

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



		September 29, 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	2.4	$	31,707	$	(19,101	)	$	12,606	$	31,707	$	(15,216	)	$	16,491
Customer relationships/contracts	3.4	44,748		(34,425		)	10,323		44,384		(32,098		)	12,286
Trademarks and trade names	2.4	641		(254		)	387		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		$	85,607	$	(62,291	)	$	23,316	$	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 nine months ended September 29, 2017 and September 30, 2016 was allocated as follows (in thousands):



	Three months ended				Nine months ended
	September 29, 2017		September 30, 2016		September 29, 2017		September 30, 2016
Included in cost of revenue	$	1,295	$	1,380	$	3,885	$	3,105
Included in operating expenses	793		3,009		2,347		9,606
Total amortization expense	$	2,088	$	4,389	$	6,232	$	12,711

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 three months)	$	1,296	$	794	$	2,090
2018	5,180		3,182		8,362
2019	5,180		3,182		8,362
2020	950		3,048		3,998
2021	—		504		504
Total future amortization expense	$	12,606	$	10,710	$	23,316