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Business Combinations (Narrative) (Details) (USD $) | 12 Months Ended | 0 Months Ended | 6 Months Ended | 0 Months Ended |  | 6 Months Ended
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Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2012 | Oct. 31, 2013 Enterasys Networks, Inc. | Oct. 31, 2013 Enterasys Networks, Inc. | Jun. 30, 2014 Enterasys Networks, Inc. | Jun. 30, 2014 Enterasys Networks, Inc. Goodwill | Jun. 30, 2014 Enterasys Networks, Inc. Property, Plant and Equipment | Jun. 30, 2014 Enterasys Networks, Inc. Other Current Liabilities | Jun. 30, 2014 Enterasys Networks, Inc. Other Noncurrent Liabilities | Dec. 31, 2013 Enterasys Networks, Inc. Order Backlog | Oct. 31, 2013 Enterasys Networks, Inc. Order Backlog | Mar. 31, 2014 Enterasys Networks, Inc. In Process Research and Development | Jun. 30, 2014 Acquisition and Integration Costs Enterasys Networks, Inc.
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase price paid in acquisition | $ 180,000,000 | $ 0 | $ 0 |  | $ 180,000,000 |  |  |  |  |  |  |  |  |
Decrease in receivables |  |  |  |  |  | 2,428,000 |  |  |  |  |  |  |  |
Increase in goodwill |  |  |  |  |  | 2,400,000 |  |  |  |  |  |  |  |
Decrease in current assets |  |  |  |  |  | 1,514,000 |  |  |  |  |  |  |  |
Increase (decrease) in property and equipment |  |  |  |  |  | (1,829,000) | 3,000,000 | 1,200,000 | 200,000 | 1,000,000 |  |  |  |
Estimated useful life |  |  |  | 3 years |  |  |  |  |  |  | 1 year 6 months | 1 year |  |
Increase in fair value of current liabilities |  |  |  |  |  | 5,400,000 |  |  |  |  |  |  |  |
Increase in fair value of accrued liabilities |  |  |  |  |  | 500,000 |  |  |  |  |  |  |  |
Fair value of indefinite lived intangibles |  |  |  |  |  |  |  |  |  |  |  |  | 3,000,000 |
Increase in revenue |  |  |  |  |  | 227,700,000 |  |  |  |  |  |  |  |
Increase in operating income |  |  |  |  |  | 13,500,000 |  |  |  |  |  |  |  |
Business Combination, Separately Recognized Transactions, Additional Disclosures, Acquisition Cost Expensed |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 6,000,000

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