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Identifiable Intangible Assets and Goodwill
9 Months Ended
Sep. 30, 2013
Finite-Lived Intangible Assets [Line Items]  
Goodwill and Intangible Assets Disclosure [Text Block]
Goodwill and Purchased Intangible Assets
Goodwill
The changes in the carrying amount of goodwill are as follows:
Balance at December 31, 2012
 
$
16,845

Tamar acquisition
 
7,939

Other
 
150

Balance at September 30, 2013
 
$
24,934



Purchased Intangible Assets
Purchased intangible assets as of  September 30, 2013 and December 31, 2012 are as follows:


Gross Carrying Amount

Accumulated Amortization

Net
September 30, 2013







 

Developed technology

$
59,794


$
50,959


$
8,835

Customer and distributor relationships

9,534


7,353


2,181

Trade names

4,361


3,305


1,056

Total identifiable intangible assets

$
73,689


$
61,617


$
12,072

December 31, 2012

 


 


 

Developed technology

$
58,961


$
49,358


$
9,603

Customer and distributor relationships

8,712


7,102


1,610

Trade names

4,361


3,216


1,145

Total identifiable intangible assets

$
72,034


$
59,676


$
12,358


Intangible asset amortization expense for the three and nine months ended September 30, 2013 was $666 and $1,930, respectively. For the three and nine months ended September 30, 2012, intangible assets amortization expense was $523 and $1,355, respectively. Assuming no change in the gross carrying value of identifiable intangible assets and estimated lives, estimated amortization expense for the remainder of 2013 will be $674, and for each of the next five years estimated amortization expense amounts to $2,411 for 2014, $2,039 for 2015, $1,931 for 2016, $1,543 for 2017, and $1,106 for 2018.