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Business combinations (Schedule of Finite-Lived Intangible Assets Acquired) (Details) (USD $) In Thousands, unless otherwise specified |  |  |  |  | 0 Months Ended
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Dec. 31, 2013 | Jun. 30, 2013 | Dec. 31, 2013 Developed technology | Dec. 31, 2013 Customer relationships | Dec. 31, 2013 Maintenance contracts | Dec. 31, 2013 Trademarks | Dec. 31, 2013 Order backlog | Oct. 31, 2013 Enterasys Networks, Inc. | Oct. 31, 2013 Enterasys Networks, Inc. Developed technology | Oct. 31, 2013 Enterasys Networks, Inc. Customer relationships | Oct. 31, 2013 Enterasys Networks, Inc. Maintenance contracts | Oct. 31, 2013 Enterasys Networks, Inc. Trademarks | Oct. 31, 2013 Enterasys Networks, Inc. Order backlog
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated Useful Life |  |  |  |  |  |  |  |  | 3 years | 3 years | 5 years | 3 years | 1 year 6 months
Amount | $ 121,806 | $ 12,906 | $ 45,000 | $ 37,000 | $ 17,000 | $ 2,500 | $ 7,400 | $ 108,900 | $ 45,000 | $ 37,000 | $ 17,000 | $ 2,500 | $ 7,400

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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275 + Details
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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