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Goodwill and Other Intangible Assets
12 Months Ended
Jan. 02, 2016
Goodwill and Other Intangible Assets  
Goodwill and Other Intangible Assets

10. Goodwill and Other Intangible Assets

Goodwill

        The following summarizes the activity in goodwill for the years ended January 2, 2016 and January 3, 2015 (in thousands):

 
  Year Ended  
 
  January 2,
2016
  January 3,
2015
 

Beginning balance

  $ 228,781   $ 228,781  

Additions due to business combinations

    43,941      

Ending balance

  $ 272,722   $ 228,781  

Other Intangible Assets

        The gross carrying amount and accumulated amortization of other intangible assets are as follows (in thousands):

 
   
  January 2, 2016   January 3, 2015  
 
  Weighted-Average
Amortization
Period
(Years)
 
 
  Gross
Amount
  Accumulated
Amortization
  Gross
Amount
  Accumulated
Amortization
 

Intangible assets:

                             

Subject to amortization:

                             

Core and developed technology

  9   $ 170,541   $ (70,135 ) $ 148,891   $ (47,894 )

Customer relationships

  7     23,170     (7,259 )   14,500     (4,003 )

Patents

  6     3,022     (1,763 )   3,000     (1,250 )

Trademarks

  7     3,490     (952 )   2,210     (433 )

 

  9     200,223     (80,109 )   168,601     (53,580 )

Not subject to amortization:

 

 

   
 
   
 
   
 
   
 
 

In-process research and development

  Not amortized     1,240              

Total intangible assets

      $ 201,463   $ (80,109 ) $ 168,601   $ (53,580 )

        Gross intangible assets increased $32.9 million in fiscal 2015 due to the acquisition of Bluegiga and Telegesis.

        Amortization expense related to intangible assets for fiscal 2015, 2014 and 2013 was $26.5 million, $17.9 million and $14.6 million, respectively. The estimated aggregate amortization expense for intangible assets subject to amortization for each of the five succeeding fiscal years is as follows (in thousands):

Fiscal Year
   
 

2016

  $ 26,677  

2017

    23,012  

2018

    20,995  

2019

    15,530  

2020

    13,298