Goodwill and Identified Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

reportable segments for the three months ended March 31, 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	625		7		632
Balance as of March 31, 2017	$	177,144	$	60,767	$	237,911

Summary of Goodwill and Identified Intangible Assets

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



		March 31, 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	2.9	$	31,708	$	(16,512	)	$	15,196	$	31,707	$	(15,216	)	$	16,491
Customer relationships/contracts	3.9	44,433		(32,845		)	11,588		44,384		(32,098		)	12,286
Trademarks and trade names	2.9	582		(158		)	424		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		$	85,234	$	(58,026	)	$	27,208	$	85,175	$	(55,944	)	$	29,231

Amortization Expense for Identifiable Purchased Intangible Assets

Amortization expense for the identifiable purchased intangible assets for the three months ended March 31, 2017 and April 1, 2016 was allocated as follows (in thousands):



	Three months ended
	March 31, 2017		April 1, 2016
Included in cost of revenue	$	1,295	$	418
Included in operating expenses	774		2,365
Total amortization expense	$	2,069	$	2,783

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 nine months)	$	3,885	$	2,328	$	6,213
2018	5,180		3,104		8,284
2019	5,180		3,104		8,284
2020	951		2,983		3,934
2021	—		493		493
Total future amortization expense	$	15,196	$	12,012	$	27,208