Goodwill and Identified Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2016

Goodwill and Intangible Assets Disclosure [Abstract]

(in thousands):



	Video			Cable Edge			Total
Balance as of December 31, 2015	$	136,904		$	60,877		$	197,781
Goodwill from TVN acquisition	41,670			—			41,670
Foreign currency translation adjustment	(2,055		)	(117		)	(2,172		)
Balance as of December 31, 2016	$	176,519		$	60,760		$	237,279

Summary of Identified Intangible Assets

The following is a summary of the Company’s identified intangible assets (in thousands):



		December 31, 2016							December 31, 2015
	Weighted Average Remaining Life (Years)	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Developed core technology	3.2	$	31,707	$	(15,216	)	$	16,491	$	10,987	$	(10,987	)	$	—
Customer relationships/contracts	4.2	44,384		(32,098		)	12,286		29,200		(25,752		)	3,448
Trademarks and tradenames	3.2	573		(119		)	454		—		—			—
Maintenance agreements and related relationships	N/A	5,500		(5,500		)	—		5,500		(4,851		)	649
Order Backlog	N/A	3,011		(3,011		)	—		—		—			—
Total identifiable intangibles		$	85,175	$	(55,944	)	$	29,231	$	45,687	$	(41,590	)	$	4,097

Purchased Intangibles Amortization Expense Allocation

Amortization expense for the identifiable intangible assets for the years ended December 31, 2016, 2015 and 2014 was allocated as follows (in thousands):



	December 31,
	2016		2015		2014
Included in cost of revenue	$	4,434	$	719	$	13,745
Included in operating expenses	10,402		5,783		6,775
Total amortization expense	$	14,836	$	6,502	$	20,520

Schedule of Finite-Lived Intangible Assets, Estimated Future Amortization Expense

The estimated future amortization expense of identifiable intangible assets with definite lives is as follows (in thousands):



	Cost of Revenue		Operating Expenses		Total
Year ended December 31,
2017	$	5,180	$	3,092	$	8,272
2018	5,180		3,092		8,272
2019	5,180		3,092		8,272
2020	951		2,972		3,923
2021	—		492		492
Total future amortization expense	$	16,491	$	12,740	$	29,231