Goodwill and Identified Intangible Assets (Tables)

9 Months Ended

Sep. 27, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

The changes in the carrying amount of goodwill for the nine months ended September 27, 2019 were as follows (in thousands):



	Video			Cable Access			Total
Balance as of December 31, 2018	$	179,839		$	60,779		$	240,618
Foreign currency translation adjustment, net	(1,869		)	(15		)	(1,884		)
Balance as of September 27, 2019	$	177,970		$	60,764		$	238,734

Summary of Goodwill and Identified Intangible Assets

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



		September 27, 2019							December 31, 2018
	Weighted Average Remaining Life (Years)	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Developed core technology	0.4	$	31,707	$	(29,461	)	$	2,246	$	31,707	$	(25,576	)	$	6,131
Customer relationships/contracts	1.4	44,501		(40,291		)	4,210		44,650		(38,146		)	6,504
Trademarks and trade names	0.4	595		(533		)	62		623		(441		)	182
Maintenance agreements and related relationships	n/a	5,500		(5,500		)	—		5,500		(5,500		)	—
Order backlog	n/a	3,056		(3,056		)	—		3,112		(3,112		)	—
Total identifiable intangibles, net		$	85,359	$	(78,841	)	$	6,518	$	85,592	$	(72,775	)	$	12,817

Amortization Expense for Identifiable Purchased Intangible Assets

Amortization expense for the identifiable purchased intangible assets for the three and nine months ended September 27, 2019 and September 28, 2018 was allocated as follows (in thousands):



	Three months ended				Nine months ended
	September 27, 2019		September 28, 2018		September 27, 2019		September 28, 2018
Included in cost of revenue	$	1,295	$	1,295	$	3,885	$	3,885
Included in operating expenses	785		792		2,357		2,396
Total amortization expense	$	2,080	$	2,087	$	6,242	$	6,281

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,
2019 (remaining three months)	$	1,295	$	780	$	2,075
2020	951		2,997		3,948
2021	—		495		495
Total future amortization expense	$	2,246	$	4,272	$	6,518