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Goodwill and Intangible Assets
12 Months Ended
Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Intangible Assets
14. GOODWILL AND INTANGIBLE ASSETS

The following table sets forth information with respect to goodwill and other intangible assets:

 

     December 31  

In thousands

     2015         2014   

Goodwill – Composite Fibers

   $ 76,056       $ 84,137   
  

 

 

 

Specialty Papers

     

Customer relationships

   $ 6,155       $ 6,155   

Composite Fibers

     

Tradename

     4,332         5,902   

Technology and related

     37,625         41,749   

Customer relationships and related

     33,618         37,421   

Advanced Airlaid Materials

     

Technology and related

     1,403         1,500   

Customer relationships and related

     2,725         3,042   

Total intangibles

     85,858         95,769   

Accumulated amortization

     (22,801      (18,671

Net intangibles

   $ 63,057       $ 77,098   

The change in goodwill was due to currency translation adjustments. Other than non-amortizable goodwill and tradename, intangible assets are amortized on a straight-line basis. Customer relationships are amortized over periods ranging from 10 years to 14 years and technology and related intangible assets are amortized over periods ranging from 14 years to 20 years. The following table sets forth information pertaining to amortization of intangible assets:

 

In thousands

     2015         2014         2013   

Aggregate amortization expense:

   $ 5,340       $ 6,136       $ 4,511   

Estimated amortization expense:

        

2016

     4,806         

2017

     4,652         

2018

     4,652         

2019

     4,652         

2020

     4,497                     

The remaining weighted average useful life of intangible assets was 13.9 years at December 31, 2015.