Goodwill and Identified Intangible Assets (Tables)

6 Months Ended

Jun. 29, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

The changes in the carrying amount of goodwill by reportable segments for the six months ended June 29, 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	(1,633		)	(18		)	(1,651		)
Balance as of June 29, 2018	$	180,379		$	60,797		$	241,176

Summary of Goodwill and Identified Intangible Assets

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



		June 29, 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	1.7	$	31,707	$	(22,985	)	$	8,722	$	31,707	$	(20,396	)	$	11,311
Customer relationships/contracts	2.7	44,690		(36,664		)	8,026		44,819		(35,205		)	9,614
Trademarks and trade names	1.7	630		(368		)	262		654		(300		)	354
Maintenance agreements and related relationships	n/a	5,500		(5,500		)	—		5,500		(5,500		)	—
Order Backlog	n/a	3,128		(3,128		)	—		3,177		(3,177		)	—
Total identifiable intangibles		$	85,655	$	(68,645	)	$	17,010	$	85,857	$	(64,578	)	$	21,279

Amortization Expense for Identifiable Purchased Intangible Assets

Amortization expense for the identifiable purchased intangible assets for the three and six months ended June 29, 2018 and June 30, 2017 was allocated as follows (in thousands):



	Three months ended				Six months ended
	June 29, 2018		June 30, 2017		June 29, 2018		June 30, 2017
Included in cost of revenue	$	1,295	$	1,295	$	2,590	$	2,590
Included in operating expenses	800		780		1,604		1,554
Total amortization expense	$	2,095	$	2,075	$	4,194	$	4,144

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 six months)	$	2,590	$	1,584	$	4,174
2019	5,180		3,167		8,347
2020	951		3,036		3,987
2021	—		502		502
Total future amortization expense	$	8,721	$	8,289	$	17,010