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Goodwill and Other Intangible Assets
12 Months Ended
Dec. 31, 2011
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 December 31, 2011 and January 1, 2011 (in thousands):

 
  Year Ended  
 
  December 31,
2011
  January 1,
2011
 

Beginning balance

  $ 112,296   $ 105,109  

Additions due to business combinations

    4,097     7,187  

Adjustments

    (904 )    
           

Ending balance

  $ 115,489   $ 112,296  
           

Other Intangible Assets

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

 
   
  December 31, 2011   January 1, 2011  
 
  Weighted-Average
Amortization
Period (Years)
  Gross Amount   Accumulated Amortization   Gross Amount   Accumulated Amortization  

Intangible assets:

                             

Subject to amortization:

                             

Core and developed technology

  9.4   $ 79,500   $ (30,432 ) $ 64,270   $ (22,383 )

Customer relationships

  9.9     2,510     (523 )   3,410     (1,766 )

Patents

              2,898     (2,657 )
                       

 

  9.4     82,010     (30,955 )   70,578     (26,806 )

Not subject to amortization:

                             

In-process research and development

  Not amortized     8,950         9,470      
                       

Total intangible assets

      $ 90,960   $ (30,955 ) $ 80,048   $ (26,806 )
                       

        Gross intangible assets increased $18.0 million in fiscal 2011 due to the acquisition of Spectra Linear. This increase was offset by the removal of $2.9 million of fully amortized assets and $4.2 million of impaired assets (which had a remaining unamortized balance of $1.3 million, resulting in a $1.3 million charge primarily to research and development expense in the Consolidated Statement of Income). The impaired assets were written down to zero.

        Amortization expense related to intangible assets for fiscal 2011, 2010 and 2009 was $9.9 million, $7.5 million and $7.8 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
   
 

2012

  $ 9,056  

2013

    7,680  

2014

    6,840  

2015

    6,448  

2016

    5,716