Purchase of Comfortaire Acquired Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
Jun. 29, 2013	Jun. 30, 2012
Acquired Definite-Lived Intangible Asset	$ 1,396	$ 0
Comfortaire Corporation [Member]
Total Indefinite-Lived and Definite-Lived Intangible Assets Acquired	8,638
Comfortaire Corporation [Member] \| Developed Technologies[Member]
Estimated useful life definite-lived intangible asset	10 years
Acquired Definite-Lived Intangible Asset	4,829
Comfortaire Corporation [Member] \| Customer Relationships [Member]
Estimated useful life definite-lived intangible asset	7 years
Acquired Definite-Lived Intangible Asset	2,413
Comfortaire Corporation [Member] \| Trade Names/Trademarks [Member]
Trade name/trademarks	$ 1,396

AcquiredIFiniteLivedAndIndefiniteLivedIntangibleAssetTotalAmount

No definition available.

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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.

+ References

No definition available.

+ Details

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- Definition

Amount of increase in assets, excluding financial assets and goodwill, lacking physical substance with an indefinite life, resulting from a business combination.

+ References

No definition available.

+ Details

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