Goodwill and Identified Intangible Assets (Tables)

3 Months Ended

Mar. 30, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

The changes in the carrying amount of goodwill by reportable segments for the three months ended March 30, 2018 were as follows (in thousands):



	Video		Cable Access		Total
Balance as of December 31, 2017	$	182,012	$	60,815	$	242,827
Foreign currency translation adjustment	954		24		978
Balance as of March 30, 2018	$	182,966	$	60,839	$	243,805

Summary of Goodwill and Identified Intangible Assets

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



		March 30, 2018							December 31, 2017
	Weighted Average Remaining Life (Years)	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Developed core technology	1.9	$	31,707	$	(21,691	)	$	10,016	$	31,707	$	(20,396	)	$	11,311
Customer relationships/contracts	2.9	44,893		(35,996		)	8,897		44,819		(35,205		)	9,614
Trademarks and trade names	1.9	668		(348		)	320		654		(300		)	354
Maintenance agreements and related relationships	N/A	5,500		(5,500		)	—		5,500		(5,500		)	—
Order Backlog	N/A	3,204		(3,204		)	—		3,177		(3,177		)	—
Total identifiable intangibles		$	85,972	$	(66,739	)	$	19,233	$	85,857	$	(64,578	)	$	21,279

Amortization Expense for Identifiable Purchased Intangible Assets

Amortization expense for the identifiable purchased intangible assets for the three months ended March 30, 2018 and March 31, 2017 was allocated as follows (in thousands):



	Three months ended
	March 30, 2018		March 31, 2017
Included in cost of revenue	$	1,295	$	1,295
Included in operating expenses	804		774
Total amortization expense	$	2,099	$	2,069

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,
2018 (remaining 9 months)	$	3,885	$	2,413	$	6,298
2019	5,180		3,217		8,397
2020	951		3,078		4,029
2021	—		509		509
Total future amortization expense	$	10,016	$	9,217	$	19,233