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Acquisitions Purchase Price Allocation (Details) (ADAPTIX, Inc. [Member], USD $)
In Thousands, unless otherwise specified
0 Months Ended 6 Months Ended
Jan. 12, 2012
Jun. 30, 2012
ADAPTIX, Inc. [Member]
   
Business Acquisition [Line Items]    
Fair value of net tangible assets acquired $ 10,000  
Intangible assets acquired - patents 150,000  
Goodwill 36,202  
Net deferred income tax liability (36,202)  
Total purchase price 160,000 160,000
Intangible assets acquired - patents - amortization period 10 years  
Intangible assets acquired - patents - annual amortization $ 15,000