GOODWILL AND IDENTIFIED INTANGIBLE ASSETS

Goodwill

Goodwill represents the cost in excess of the fair value of the net assets acquired in a business combination. Goodwill is tested for impairment at the reporting unit level on an annual basis and on an interim basis if an event occurs or circumstances change that would more likely than not reduce the fair value of a reporting unit below its carrying value. The Company determined that there was no impairment identified as of March 27, 2020.

The changes in the carrying amount of goodwill for the three months ended March 27, 2020 were as follows (in thousands):



	Video			Cable Access			Total
Balance as of December 31, 2019	$	178,982		$	60,798		$	239,780
Foreign currency translation adjustment, net	(1,110		)	(56		)	(1,166		)
Balance as of March 27, 2020	$	177,872		$	60,742		$	238,614

Intangible Assets, Net

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



		March 27, 2020							December 31, 2019
	Weighted Average Remaining Life (Years)	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Developed core technology	0.3	$	31,707	$	(31,642	)	$	65	$	31,707	$	(30,757	)	$	950
Customer relationships/contracts	0.9	44,497		(41,773		)	2,724		44,577		(41,092		)	3,485
Trademarks and trade names	n/a	594		(594		)	—		609		(583		)	26
Maintenance agreements and related relationships	n/a	5,500		(5,500		)	—		5,500		(5,500		)	—
Order backlog	n/a	3,054		(3,054		)	—		3,085		(3,085		)	—
Total identifiable intangibles, net		$	85,352	$	(82,563	)	$	2,789	$	85,478	$	(81,017	)	$	4,461

Amortization expense for the identifiable purchased intangible assets for the three months ended March 27, 2020 and March 29, 2019 was allocated as follows (in thousands):



	Three months ended
	March 27, 2020		March 29, 2019
Included in cost of revenue	$	885	$	1,295
Included in operating expenses	770		788
Total amortization expense	$	1,655	$	2,083

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,
2020 (remaining nine months)	$	65	$	2,228	$	2,293
2021	—		496		496
Total future amortization expense	$	65	$	2,724	$	2,789