Goodwill and Identified Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2018

(in thousands):



	Video			Cable Access			Total
Balance as of December 31, 2016	$	176,519		$	60,760		$	237,279
Foreign currency translation adjustment	5,493			55			5,548
Balance as of December 31, 2017	$	182,012		$	60,815		$	242,827
Foreign currency translation adjustment	(2,173		)	(36		)	(2,209		)
Balance as of December 31, 2018	$	179,839		$	60,779		$	240,618

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



		December 31, 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	1.2	$	31,707	$	(25,576	)	$	6,131	$	31,707	$	(20,396	)	$	11,311
Customer relationships/contracts	2.2	44,650		(38,146		)	6,504		44,819		(35,205		)	9,614
Trademarks and tradenames	1.2	623		(441		)	182		654		(300		)	354
Maintenance agreements and related relationships	N/A	5,500		(5,500		)	—		5,500		(5,500		)	—
Order Backlog	N/A	3,112		(3,112		)	—		3,177		(3,177		)	—
Total identifiable intangibles		$	85,592	$	(72,775	)	$	12,817	$	85,857	$	(64,578	)	$	21,279

Amortization expense for the identifiable intangible assets was allocated as follows (in thousands):



	Year Ended December 31,
	2018		2017		2016
Included in cost of revenue	$	5,180	$	5,180	$	4,434
Included in operating expenses	3,187		3,142		10,402
Total amortization expense	$	8,367	$	8,322	$	14,836

The estimated future amortization expense of identifiable intangible assets with definite lives as of December 31, 2018 is as follows (in thousands):



	Cost of Revenue		Operating Expenses		Total
Year ended December 31,
2019	$	5,180	$	3,158	$	8,338
2020	951		3,028		3,979
2021	—		500		500
Total future amortization expense	$	6,131	$	6,686	$	12,817