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Acquisitions Purchase Price Allocation (Details) (ADAPTIX, Inc. [Member], USD $) In Thousands, unless otherwise specified | 0 Months Ended | 9 Months Ended
--- | --- | ---
Jan. 12, 2012 | Sep. 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 |

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