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Business Combinations
 12 Months Ended
Dec. 31, 2011
Business Combinations  
Business Combinations

5.     Business Combinations

        On April 4, 2011, we purchased a privately-held company which supplies certain components to one of our businesses for $28.3 million in cash. As a result of this purchase, we acquired $16.4 million of definite-lived intangibles, of which $13.6 million related to core technology, and $14.7 million of goodwill. The financial results of this acquisition are included in our LED & Solar segment as of the acquisition date. We have determined that this acquisition does not constitute a material business combination and therefore are not including pro forma financial statements in this report.