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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

X

- Definition

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+ References

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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

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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.

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