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Goodwill and Other Intangible Assets
6 Months Ended
Jun. 30, 2011
Goodwill and Other Intangible Assets  
Goodwill and Other Intangible Assets

(8) Goodwill and Other Intangible Assets

The changes in the carrying value of goodwill during the six months ended June 30, 2011 are as follows:

 

     Total  
     (Dollars in
Thousands)
 

Balance as of December 31, 2010

     499,238   

Currency translation effect

     (160

Business acquisition (a)

     1,610   
        

Balance as of June 30, 2011

   $ 500,688   
        
(a) Includes adjustment to preliminary assignment of fair value to net assets acquired.

The following table summarizes intangible assets with determinable useful lives by major category as of December 31, 2010 and June 30, 2011:

 

     At December 31, 2010      At June 30, 2011  
   Gross
Carrying
Amount
     Accumulated
Amortization
    Net
Carrying
Amount
     Gross
Carrying
Amount
     Accumulated
Amortization
    Net
Carrying
Amount
 
   (Dollars in Thousands)  

Patents

   $ 3,520       $ (1,168   $ 2,352       $ 3,520       $ (1,280   $ 2,240   

Trade name

     7,900         (124     7,776         7,900         (861     7,039   

Technological know-how

     42,800         (497     42,303         43,349         (3,508     39,841   

Customer –related intangible

     107,500         (1,258     106,242         108,267         (8,810     99,457   
                                                   

Total finite-lived intangible assets

   $ 161,720       $ (3,047   $ 158,673       $ 163,036       $ (14,459   $ 148,577   
                                                   

Amortization expense of intangible assets was $0.1 million and $5.7 million in the three months ended June 30, 2010 and 2011, respectively, and $0.1 million and $11.4 million in the six months ended June 30, 2010 and 2011, respectively.