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Acquisitions (Details) (ADAPTIX, Inc. [Member], USD $) | 0 Months Ended | 9 Months Ended
--- | --- | ---
Jan. 12, 2012 Number | Sep. 30, 2012
ADAPTIX, Inc. [Member] |  |
Business Acquisition [Line Items] |  |
Purchase price allocation, cash and cash equivalents | $ 10,000,000 |
Number of patents acquired | 230 |
Number of countries which have patents | 13 |
Cash payments to acquire businesses | 160,000,000 | 160,000,000
Intangible assets acquired - patents - amortization period | 10 years |
Intangible assets acquired - patents, book basis | 150,000,000 |
Intangible assets acquired - patents, tax basis | 0 |
Intangible assets acquired - patents - difference | (150,000,000) |
Estimated net operating loss carryforwards - ADAPTIX, book basis | 0 |
Estimated net operating loss carryforwards - ADAPTIX, tax basis | 46,565,000 |
Estimated net operating loss carryforwards - ADAPTIX, difference | 46,565,000 |
Net deferred tax liability - pretax | (103,435,000) |
Estimated tax rate | 35.00% |
Estimated net deferred tax liability | $ (36,202,000) |

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