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Business Combinations Business Combinations (Intangible Assets Acquired) (Details) - USD ($) $ in Thousands |  | 3 Months Ended
--- | --- | ---
Oct. 31, 2014 | Apr. 01, 2016 | Jan. 01, 2016 | Mar. 27, 2015 | Dec. 26, 2014
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Weighted average useful life |  | 0 years | 9 years | 0 years | 18 years
Doremi Labs [Member] |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Purchase Price Allocation | $ 45,600 |  |  |  |
Doremi Labs [Member] | Customer Relationships [Member] |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Purchase Price Allocation | $ 25,600 |  |  |  |
Weighted average useful life | 10 years |  |  |  |
Doremi Labs [Member] | Developed Technology [Member] |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Purchase Price Allocation | $ 17,500 |  |  |  |
Weighted average useful life | 7 years 6 months |  |  |  |
Doremi Labs [Member] | Trade Name [Member] |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Purchase Price Allocation | $ 1,300 |  |  |  |
Weighted average useful life | 1 year |  |  |  |
Doremi Labs [Member] | Backlog [Member] |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Purchase Price Allocation | $ 1,200 |  |  |  |
Weighted average useful life | 1 year |  |  |  |

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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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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