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Business Combinations (Schedule of Finite-Lived Intangible Assets Acquired) (Details) (Enterasys Networks, Inc., USD $) In Thousands, unless otherwise specified | 0 Months Ended
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Dec. 31, 2013 | Oct. 31, 2013
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Estimated Useful Life (in years) |  | 3 years
Amount |  | $ 108,900
Developed Technology |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Estimated Useful Life (in years) |  | 3 years
Amount |  | 45,000
Customer Relationships |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Estimated Useful Life (in years) |  | 3 years
Amount |  | 37,000
Maintenance Contracts |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Estimated Useful Life (in years) |  | 5 years
Amount |  | 17,000
Trademarks |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Estimated Useful Life (in years) |  | 3 years
Amount |  | 2,500
Order Backlog |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Estimated Useful Life (in years) | 1 year 6 months | 1 year
Amount |  | $ 7,400

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- Definition Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, resulting from a business combination. + References No definition available. + Details
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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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