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Goodwill and Intangible Assets
9 Months Ended
Sep. 30, 2016
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Intangible Assets
Goodwill and Intangible Assets

The Company completes its annual impairment test during the fourth quarter of each year, or more frequently if triggering events indicate a possible impairment. The Company continually evaluates financial performance, economic conditions and other relevant developments in assessing if an interim period impairment test is necessary. Since its inception and through September 30, 2016, the Company has not recorded an impairment charge, but if the Company's stock price continues to trade at its current levels without recovery, the Company may be required to record an impairment in the future and such amount could be material. Changes in the carrying amount of goodwill for the nine months ended September 30, 2016 are as follows:
(in thousands)
 
Goodwill
Balance as of December 31, 2015
 
$
56,006

Measurement-period adjustments
 
6,367

Balance as of September 30, 2016
 
$
62,373




The Company’s other intangible assets at September 30, 2016 and December 31, 2015 consisted of the following:
 
 
September 30, 2016
 
December 31, 2015
(in thousands)
 
Gross Carrying Amount
Accumulated Amortization
Net
 
Gross Carrying Amount
Accumulated Amortization
Net
Other intangible assets:
 
 
 
 
 
 
 
 
Developed technology
 
$
757,000

$
(45,803
)
$
711,197

 
$
757,000

$
(16,360
)
$
740,640

In-process research and development
 
39,000

(181
)
38,819

 
39,000


39,000

Trade name
 
35,500


35,500

 
35,500


35,500

Service provider network
 
2,000


2,000

 
2,000


2,000

Customer relationships
 
8,000

(389
)
7,611

 
8,000

(139
)
7,861

Software
 
135

(16
)
119

 
60

(5
)
55

Total intangible assets
 
$
841,635

$
(46,389
)
$
795,246

 
$
841,560

$
(16,504
)
$
825,056



At September 30, 2016, the weighted-average amortization period for the finite-lived intangible assets was 18.7 years. At September 30, 2016, the weighted-average amortization period for developed technology, customer relationships, in-process research and development, and software was 18.7, 23.1, 17.1, and 4.1 years, respectively.

Estimated annual amortization expense for finite-lived intangible assets subsequent to September 30, 2016 is as follows:
(in thousands)
 
Amount
2016 (remaining)
 
$
10,446

2017
 
41,785

2018
 
41,785

2019
 
41,781

2020
 
41,773

Thereafter
 
580,176

 
 
$
757,746