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Goodwill and Other Intangible Assets
3 Months Ended
Apr. 01, 2012
Goodwill and Other Intangible Assets [Abstract]  
Goodwill and Other Intangible Assets
Note 6.  Goodwill and Other Intangible Assets

     Goodwill and other intangible assets with indefinite lives are not amortized, but instead are tested for impairment, at least annually. The carrying amount of goodwill was $65.8 million and $64.7 million as of April 1, 2012 and December 31, 2011, respectively.  The net change in goodwill since December 31, 2011 was attributable to the effect of foreign exchange.

     Acquired intangible assets subject to amortization as of April 1, 2012 and December 31, 2011 were as follows:

   
April 1, 2012
 
December 31, 2011
(millions of dollars)
   
Gross Carrying Amount
     
Accumulated Amortization
     
Gross Carrying Amount
     
Accumulated Amortization
 
Patents and trademarks
 
$
6.2
     
3.9
     
6.2
     
4.0
 
Customer lists
   
2.7
     
1.4
     
2.7
     
1.5
 
   
$
8.9
     
5.3
     
8.9
     
5.5
 

     The weighted average amortization period for acquired intangible assets subject to amortization is approximately 15 years.  Estimated amortization expense is $0.6 million for each of the next five years through 2016.

     Also included in other assets and deferred charges is an intangible asset of approximately $0.6 million which represents the non-current unamortized amount paid to a customer in connection with contract extensions at seven
PCC satellite facilities.  The current portion of $0.5 million is included in prepaid expenses and other current assets.  Such amounts will be amortized as a reduction of sales over the remaining lives of the customer contracts.  Approximately $0.2 million was amortized in the first quarter of 2012. Estimated amortization as a reduction of sales is as follows: remainder of 2012 - $0.2 million; 2013 - $0.4 million; 2014 - $0.4 million; 2015 - $0.1 million.