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Identifiable Intangible Assets
3 Months Ended
Mar. 31, 2016
Finite-Lived Intangible Assets [Line Items]  
Intangible Assets Disclosure [Text Block]
Purchased Intangible Assets
Purchased intangible assets as of March 31, 2016 and December 31, 2015 are as follows:


Gross Carrying Amount

Accumulated Amortization

Net
March 31, 2016







 

Finite-lived intangibles:
 
 
 
 
 
 
Developed technology

$
65,527


$
55,592


$
9,935

Customer and distributor relationships

9,560


8,258


1,302

Trade names

4,361


3,600


761

Total identifiable intangible assets

$
79,448


$
67,450


$
11,998

December 31, 2015

 


 


 

Finite-lived intangibles:
 
 
 
 
 
 
Developed technology

$
65,527


$
55,110


$
10,417

Customer and distributor relationships

9,560


8,170


1,390

Trade names

4,361


3,575


786

Total identifiable intangible assets

$
79,448


$
66,855


$
12,593


Intangible asset amortization expense for the three months ended March 31, 2016 and 2015 was $595 and $515, respectively. Assuming no change in the gross carrying value of identifiable intangible assets and estimated lives, estimated amortization expense for the remainder of 2016 will be $1,726, and for each of the next five years estimated amortization expense amounts to $1,933 for 2017, $1,496 for 2018, $1,496 for 2019, $1,294 for 2020, and $546 for 2021.