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OTHER INTANGIBLE ASSETS, NET
 6 Months Ended
Jun. 30, 2011
Other Intangible Assets, Net [Abstract]  
OTHER INTANGIBLE ASSETS, NET

6.       OTHER INTANGIBLE ASSETS, NET

Intangible assets are generally the result of acquisitions and consist primarily of purchased technology and customer related intangibles. Intangible assets are amortized over useful lives that range between 1 to 20 years.

The following tables present the cumulative composition of the Corporation's intangible assets and include $9.9 million of indefinite lived intangible assets within Other intangible assets for both periods presented.

   (In thousands)
June 30, 2011 Gross Accumulated Amortization Net
Technology  $ 149,812 $ (60,769) $ 89,043
Customer related intangibles   200,818   (75,496)   125,322
Other intangible assets   43,112   (13,440)   29,672
Total $ 393,742 $ (149,705) $ 244,037
          
   (In thousands)
December 31, 2010 Gross Accumulated Amortization Net
Technology  $ 148,820 $ (54,994) $ 93,826
Customer related intangibles   189,567   (68,663)   120,904
Other intangible assets   37,005   (11,538)   25,467
Total $ 375,392 $ (135,195) $ 240,197
          

Intangible assets acquired from the Corporation's current year acquisitions include Technology of $4.6 million, Customer related intangibles of $7.3 million, and Other intangible assets of $2.5 million.

Total intangible amortization expense for the six months ended June 30, 2011 was $13.4 million. The estimated amortization expense for the five years ending December 31, 2011 through 2015 is $25.2 million, $24.0 million, $22.2 million, $21.0 million, and $20.0 million, respectively.