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Goodwill and Intangible Assets, net
3 Months Ended
Mar. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Intangible Assets, net
Goodwill and Intangible Assets, net
The changes in the carrying amount of goodwill for the three months ended March 31, 2015 and 2014 are as follows:
 
Three Months Ended 
 March 31,
 
2015
 
2014
Beginning balance
$
101,059

 
$
13,823

Acquisitions
3,131

 
25,866

Foreign currency translation adjustment
(145
)
 

Ending balance
$
104,045

 
$
39,689


No goodwill or accumulated impairment losses existed as of March 31, 2015 and December 31, 2014.
Intangible assets consist of the following at March 31, 2015:
 
Weighted Average Useful Life (Years)
 
Gross Carrying Amount
 
Accumulated Amortization
 
Net
Patents, related technologies and know-how
11.5
 
$
41,872

 
$
(11,768
)
 
$
30,104

Customer relationships
6.5
 
10,700

 
(1,289
)
 
9,411

Trademarks
8.4
 
5,900

 
(476
)
 
5,424

Covenant not to compete
2.0
 
382

 
(16
)
 
366

In-process research and development
 
 
84,003

 

 
84,003

Total
 
 
$
142,857

 
$
(13,549
)
 
$
129,308


Intangible assets consist of the following at December 31, 2014:
 
Gross Carrying Amount
 
Accumulated Amortization
 
Net
Patents, related technologies and know-how
$
41,872

 
$
(10,849
)
 
$
31,023

Customer relationships
10,700

 
(806
)
 
9,894

Trademarks
5,900

 
(298
)
 
5,602

In-process research and development
19,428

 

 
19,428

Total
$
77,900

 
$
(11,953
)
 
$
65,947


Amortization expense was $1,596 and $687 for the three months ended March 31, 2015 and 2014, respectively.