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Goodwill and Identified Intangible Assets
 9 Months Ended
Sep. 25, 2020
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Identified Intangible Assets 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 were no impairment indicators identified as of September 25, 2020.

The changes in the carrying amount of goodwill for the nine months ended September 25, 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
1,662

 
(17
)
 
1,645

Balance as of September 25, 2020
$
180,644

 
$
60,781

 
$
241,425



Intangible Assets, Net
The following is a summary of intangible assets, net (in thousands):
 
 
 
September 25, 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
n/a
 
$
30,657

 
$
(30,657
)
 
$
—

 
$
31,707

 
$
(30,757
)
 
$
950

Customer relationships/contracts
0.4
 
44,715

 
(43,459
)
 
1,256

 
44,577

 
(41,092
)
 
3,485

Trademarks and trade names
n/a
 
635

 
(635
)
 
—

 
609

 
(583
)
 
26

Maintenance agreements and related relationships
n/a
 
5,500

 
(5,500
)
 
—

 
5,500

 
(5,500
)
 
—

Order backlog
n/a
 
3,137

 
(3,137
)
 
—

 
3,085

 
(3,085
)
 
—

Total identifiable intangibles, net
 
 
$
85,694

 
$
(84,438
)
 
$
1,256

 
$
85,478

 
$
(81,017
)
 
$
4,461


Amortization expense for the identifiable purchased intangible assets for the three and nine months ended September 25, 2020 and September 27, 2019 was allocated as follows (in thousands):
 
Three months ended
 
Nine months ended
 
September 25,
2020
 
September 27,
2019
 
September 25,
2020
 
September 27,
2019
Included in cost of revenue
$
—

 
$
1,295

 
$
950

 
$
3,885

Included in operating expenses
752

 
785

 
2,264

 
2,357

Total amortization expense
$
752

 
$
2,080

 
$
3,214

 
$
6,242


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 three months)
$
—

 
$
754

 
$
754

2021
—

 
502

 
502

Total future amortization expense
$
—

 
$
1,256

 
$
1,256