Intangible Assets and Goodwill
 3 Months Ended
Mar. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets and Goodwill
Intangible Assets and Goodwill
The carrying amounts of the intangible assets other than goodwill as of March 31, 2015 and December 31, 2014 are as follows (in thousands, except years):
 
March 31, 2015
 
December 31, 2014
 
Weighted
Average
Useful Life
(Years)
 
Cost
 
Accumulated
Amortization
 
Net
 
Cost
 
Accumulated
Amortization
 
Net
 
Developed and core technology
$
145,875

 
$
(114,919
)
 
$
30,956

 
$
145,929

 
$
(112,169
)
 
$
33,760

 
6
Other Intangible Assets:
 
 
 
 
 
 
 
 
 
 
 
 
 
Customer relationships
45,177

 
(40,659
)
 
4,518

 
45,178

 
(39,766
)
 
5,412

 
5
All other (i)
19,145

 
(15,354
)
 
3,791

 
19,145

 
(15,156
)
 
3,989

 
4-9
Total other intangible assets
64,322

 
(56,013
)
 
8,309

 
64,323

 
(54,922
)
 
9,401

 
 
Total intangible assets, net
$
210,197

 
$
(170,932
)
 
$
39,265

 
$
210,252

 
$
(167,091
)
 
$
43,161

 
 

____________________
(i)
All other includes vendor relationships, trade names, covenants not to compete, and patents.

Total amortization expense related to intangible assets was $3.8 million and $5.5 million for the three months ended March 31, 2015 and 2014, respectively. Certain intangible assets were recorded in foreign currencies; and therefore, the gross carrying amount and accumulated amortization are subject to foreign currency translation adjustments.
As of March 31, 2015, the amortization expense related to identifiable intangible assets in future periods is expected to be as follows (in thousands):
 
 
 
Acquired
Technology
 
Other
Intangible
Assets (ii)
 
Total
Intangible
Assets
Remaining 2015
$
7,615

 
$
3,210

 
$
10,825

2016
8,883

 
2,449

 
11,332

2017
6,870

 
1,152

 
8,022

2018
4,756

 
729

 
5,485

2019
2,331

 
449

 
2,780

Thereafter
501

 
320

 
821

Total expected amortization expense
$
30,956

 
$
8,309

 
$
39,265


____________________
(ii)
Other Intangible Assets includes customer relationships, vendor relationships, trade names, covenants not to compete, and patents.
The changes in the carrying amount of goodwill for the three months ended March 31, 2015 are as follows (in thousands):
 
March 31,
2015
Beginning balance as of December 31, 2014
$
551,196

Goodwill from acquisition
—

Subsequent goodwill adjustments
(8,471
)
Ending balance as of March 31, 2015
$
542,725


During the three months ended March 31, 2015, the Company recorded subsequent goodwill net reductions of $8.5 million primarily related to foreign currency translation adjustments. The goodwill is partially deductible for tax purposes. See Note 13. Acquisitions of Notes to Condensed Consolidated Financial Statements in Part I, Item 1 of this Report for a further discussion of goodwill from acquisitions.