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Goodwill and Other Intangible Assets (Tables)
 12 Months Ended
Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Other Intangible Assets
The following tables present details of the Company's acquired other intangible assets:
(In thousands)
 
Gross
 
Accumulated
Amortization
 
Net
As of December 31, 2017
 
 
 
 
 
 
Patents and purchased technology
 
$
52,313

 
$
(26,794
)
 
$
25,519

Project pipeline assets
 
9,446

 
(9,446
)
 
—

Purchased in-process research and development
 
1,200

 
(1,200
)
 
—

Other
 
1,000

 
(1,000
)
 
—

 
 
$
63,959

 
$
(38,440
)
 
$
25,519

 
 
 
 
 
 
 
As of January 1, 2017
 
 
 
 
 
 
Patents and purchased technology
 
$
48,640

 
$
(15,529
)
 
$
33,111

Project pipeline assets
 
9,446

 
(1,804
)
 
7,642

Purchased in-process research and development
 
3,700

 
(485
)
 
3,215

Other
 
1,000

 
(750
)
 
250

 
 
$
62,786

 
$
(18,568
)
 
$
44,218
Schedule of Other Intangible Assets Future Amortization Expense
As of December 31, 2017, the estimated future amortization expense related to intangible assets with finite useful lives is as follows:
(In thousands)
 
Amount
Fiscal Year
 
 
2018
 
10,219

2019
 
8,948

2020
 
6,317

Thereafter
 
35

 
 
$
25,519