Goodwill and Intangible Assets Definite-Lived Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 28, 2013	Jan. 03, 2015
Definite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets	$ 7,745	$ 7,745
Finite-Lived Intangible Assets, Accumulated Amortization	1,281	2,118
Developed technologies [Member]
Definite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets	5,231	5,231
Finite-Lived Intangible Assets, Accumulated Amortization	850	1,342
Customer Relationships [Member]
Definite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets	2,413	2,413
Finite-Lived Intangible Assets, Accumulated Amortization	330	675
Trademarks and Trade Names [Member]
Definite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets	101	101
Finite-Lived Intangible Assets, Accumulated Amortization	101	101
Comfortaire Corporation [Member] \| Developed Technology Rights [Member]
Definite-Lived Intangible Assets [Line Items]
Comfortaire purchase	4,829
Comfortaire Corporation [Member] \| Customer Lists [Member]
Definite-Lived Intangible Assets [Line Items]
Comfortaire purchase	$ 2,413

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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

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- Definition

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+ References

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- Definition

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+ References

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