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Goodwill and Identified Intangible Assets
3 Months Ended
Mar. 28, 2014
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Identified Intangible Assets
GOODWILL AND IDENTIFIED INTANGIBLE ASSETS
The changes in the carrying amount of goodwill for the three months ended March 28, 2014 are as follows (in thousands):
Balance at beginning of period
$
198,022

Foreign currency translation adjustment
14

Balance at end of period
$
198,036


The following is a summary of identified intangible assets (in thousands):
 
 
 
March 28, 2014
 
December 31, 2013
 
Range of Useful Lives
 
Gross Carrying
Amount
 
Accumulated
Amortization
 
Net Carrying
Amount
 
Gross Carrying
Amount
 
Accumulated
Amortization
 
Net Carrying
Amount
Identifiable intangibles:
 
 
 
 
 
 
 
 
 
 
 
 
 
Developed core technology
4-6 years
 
$
136,145

 
$
(126,397
)
 
$
9,748

 
$
136,145

 
$
(121,681
)
 
$
14,464

Customer relationships/contracts
5-6 years
 
67,098

 
(55,134
)
 
11,964

 
67,098

 
(53,772
)
 
13,326

Trademarks and tradenames
4-5 years
 
11,361

 
(10,902
)
 
459

 
11,361

 
(10,565
)
 
796

Maintenance agreements and related relationships
6-7 years
 
7,100

 
(4,818
)
 
2,282

 
7,100

 
(4,567
)
 
2,533

Total identifiable intangibles
 
 
$
221,704

 
$
(197,251
)
 
$
24,453

 
$
221,704

 
$
(190,585
)
 
$
31,119


Amortization expense for the identifiable purchased intangible assets for the three months ended March 28, 2014 and March 29, 2013 was allocated as follows (in thousands):
 
Three months ended
 
March 28,
2014
 
March 29,
2013
Included in cost of revenue
$
4,716

 
$
4,945

Included in operating expenses
1,950

 
2,088

Total amortization expense
$
6,666

 
$
7,033


The estimated future amortization expense of purchased intangible assets with definite lives is as follows (in thousands):
 
Cost of Revenue
 
Operating
Expenses
 
Total
Year ended December 31,
 
 
 
 
 
2014 (remaining 9 months)
$
9,029

 
$
4,825

 
$
13,854

2015
719

 
5,783

 
6,502

2016

 
4,097

 
4,097

2017

 

 

2018

 

 

Total future amortization expense
$
9,748

 
$
14,705

 
$
24,453