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Goodwill and Acquired Intangible Assets
3 Months Ended
Mar. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Acquired Intangible Assets
Goodwill and Acquired Intangible Assets

The change in the carrying amount of goodwill for the three months ended March 31, 2014 was as follows (in thousands):

Balance as of January 1, 2014
$
757,368

Acquisition of Prolexic Technologies, Inc.
293,412

Balance as of March 31, 2014
$
1,050,780



The Company tests goodwill for impairment at least annually. Through the date the consolidated financial statements were issued, no triggering events had occurred that would indicate a potential impairment exists.

Acquired intangible assets that are subject to amortization consist of the following as of March 31, 2014 and December 31, 2013 (in thousands):

 
March 31, 2014
 
December 31, 2013
 
Gross
Carrying
Amount
 
Accumulated Amortization
 
Net
Carrying
Amount
 
Gross
Carrying
Amount
 
Accumulated
Amortization
 
Net
Carrying
Amount
Completed technology
$
92,431

 
$
(38,631
)
 
$
53,800

 
$
65,631

 
$
(35,476
)
 
$
30,155

Customer-related intangible assets
173,600

 
(78,708
)
 
94,892

 
115,100

 
(75,563
)
 
39,537

Non-compete agreements
8,890

 
(3,060
)
 
5,830

 
7,950

 
(2,623
)
 
5,327

Trademarks and trade names
4,200

 
(1,101
)
 
3,099

 
3,400

 
(990
)
 
2,410

Acquired license rights
490

 
(490
)
 

 
490

 
(490
)
 

Total
$
279,611

 
$
(121,990
)
 
$
157,621

 
$
192,571

 
$
(115,142
)
 
$
77,429


Aggregate expense related to amortization of acquired intangible assets for the three months ended March 31, 2014 and 2013 was $6.8 million and $6.1 million, respectively. Based on the Company’s acquired intangible assets as of March 31, 2014, aggregate expense related to amortization of acquired intangible assets is expected to be $25.2 million for the remainder of 2014, and $26.8 million, $25.2 million, $23.1 million and $16.2 million for 2015, 2016, 2017 and 2018, respectively.