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Goodwill and Acquired Intangible Assets
3 Months Ended
Mar. 31, 2015
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, 2015 was as follows (in thousands):

Balance as of January 1, 2015
$
1,051,294

Acquisition of Xerocole, Inc.
12,855

Balance as of March 31, 2015
$
1,064,149



The immaterial increase in goodwill during the first quarter of 2015 related to the acquisition of Xerocole, Inc. ("Xerocole") on February 27, 2015, a provider of recursive DNS functionality.

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, 2015 and December 31, 2014 (in thousands):

 
March 31, 2015
 
December 31, 2014
 
Gross
Carrying
Amount
 
Accumulated Amortization
 
Net
Carrying
Amount
 
Gross
Carrying
Amount
 
Accumulated
Amortization
 
Net
Carrying
Amount
Completed technology
$
91,581

 
$
(48,800
)
 
$
42,781

 
$
88,331

 
$
(45,537
)
 
$
42,794

Customer-related intangible assets
175,150

 
(94,055
)
 
81,095

 
173,600

 
(91,160
)
 
82,440

Non-compete agreements
6,790

 
(2,563
)
 
4,227

 
8,890

 
(4,224
)
 
4,666

Trademarks and trade names
3,700

 
(1,271
)
 
2,429

 
3,700

 
(1,188
)
 
2,512

Acquired license rights
490

 
(490
)
 

 
490

 
(490
)
 

Total
$
277,711

 
$
(147,179
)
 
$
130,532

 
$
275,011

 
$
(142,599
)
 
$
132,412



Aggregate expense related to amortization of acquired intangible assets for each of the three months ended March 31, 2015 and 2014 was $6.8 million. Based on the Company’s acquired intangible assets as of March 31, 2015, aggregate expense related to amortization of acquired intangible assets is expected to be $20.2 million for the remainder of 2015, and $25.4 million, $23.8 million, $17.0 million and $13.5 million for 2016, 2017, 2018 and 2019, respectively.