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PURCHASED INTANGIBLE ASSETS
 3 Months Ended
Mar. 31, 2016
Purchased Intangible Assets Disclosure [Abstract]  
PURCHASED INTANGIBLE ASSETS
PURCHASED INTANGIBLE ASSETS
 
The following table presents details of our purchased intangible assets, other than goodwill, as of March 31, 2016:
 
 
Gross
 
Accumulated
Amortization
 
Net
Core technology
$
19,298

 
$
(8,141
)
 
$
11,157

Customer relationships
38,012

 
(29,451
)
 
8,561

Trademarks / Trade names
2,070

 
(1,811
)
 
259

 
 
 
 
 
 
Total intangible assets
$
59,380

 
$
(39,403
)
 
$
19,977

 
The following table presents details of our purchased intangible assets, other than goodwill, as of December 31, 2015:
 
 
Gross
 
Accumulated
Amortization
 
Net
Core technology
$
18,524

 
$
(7,528
)
 
$
10,996

Customer relationships
36,830

 
(27,701
)
 
9,129

Trademarks / Trade names
1,988

 
(1,695
)
 
293

 
 
 
 
 
 
Total intangible assets
$
57,342

 
$
(36,924
)
 
$
20,418


 
The change in the gross value of our purchased intangible assets from December 31, 2015 to March 31, 2016 was due to foreign currency translation. Accumulated amortization for the period ended March 31, 2016 includes an adjustment due to recognition of tax benefit of tax amortization previously applied to certain goodwill related to the DynaEnergetics reporting unit. After the goodwill was written off at December 31, 2015, the tax amortization reduces other noncurrent intangible assets related to the historical acquisition.