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Goodwill and Acquired Intangibles
3 Months Ended
Mar. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]  
GOODWILL AND ACQUIRED INTANGIBLES
GOODWILL AND ACQUIRED INTANGIBLES
Goodwill
The changes in the carrying amount of goodwill during the three months ended March 31, 2018 were as follows:
 
Gross Carrying
Amount
 
(In thousands)
Balance as of December 30, 2017
$
666,009

Effect of foreign currency translation
(394
)
Balance as of March 31, 2018
$
665,615

Acquired Intangibles, Net
Acquired intangibles as of March 31, 2018 were as follows, excluding intangibles that were fully amortized as of December 30, 2017:
 
Gross Carrying
Amount
 
Accumulated
Amortization
 
Acquired
Intangibles, Net
 
(In thousands)
Existing technology
$
331,162

 
$
(197,877
)
 
$
133,285

Agreements and relationships
146,565

 
(89,725
)
 
56,840

Tradenames, trademarks and patents
10,718

 
(7,416
)
 
3,302

Total acquired intangibles with definite lives
488,445

 
(295,018
)
 
193,427

In-process technology
71,500

 

 
71,500

Total acquired intangibles
$
559,945

 
$
(295,018
)
 
$
264,927


In-process technology as of March 31, 2018 consisted of acquired projects that, if completed, will contribute to Cadence's design IP offerings. As of March 31, 2018, these projects were expected to be completed in nine to twelve months. During the three months ended March 31, 2018, there were no transfers from in-process technology to existing technology.
Acquired intangibles as of December 30, 2017 were as follows, excluding intangibles that were fully amortized as of December 31, 2016:
 
Gross Carrying
Amount
 
Accumulated
Amortization
 
Acquired
Intangibles, Net
 
(In thousands)
Existing technology
$
342,810

 
$
(199,529
)
 
$
143,281

Agreements and relationships
151,063

 
(90,675
)
 
60,388

Tradenames, trademarks and patents
10,918

 
(7,252
)
 
3,666

Total acquired intangibles with definite lives
504,791

 
(297,456
)
 
207,335

In-process technology
71,500

 

 
71,500

Total acquired intangibles
$
576,291

 
$
(297,456
)
 
$
278,835


Amortization expense from existing technology and maintenance agreements is included in cost of product and maintenance. Amortization of acquired intangibles for the three months ended March 31, 2018 and April 1, 2017 was as follows:
 
Three Months Ended
 
March 31,
2018
 
April 1,
2017
 
(In thousands)
Cost of product and maintenance
$
10,277

 
$
10,578

Amortization of acquired intangibles
3,630

 
3,856

Total amortization of acquired intangibles
$
13,907

 
$
14,434


Estimated amortization expense for intangible assets with definite lives for the following five fiscal years and thereafter is as follows:
 
(In thousands)
2018 – remaining period
$
39,446

2019
46,234

2020
40,619

2021
36,115

2022
17,810

Thereafter
13,203

Total estimated amortization expense
$
193,427