Goodwill and Intangible Assets Definite-Lived Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified											12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 28, 2013 Developed technologies [Member]		Dec. 29, 2012 Developed technologies [Member]	Dec. 28, 2013 Customer Relationships [Member]		Dec. 29, 2012 Customer Relationships [Member]	Dec. 28, 2013 TradenameAndTrademark [Member]	Dec. 29, 2012 TradenameAndTrademark [Member]	Dec. 28, 2013 Comfortaire Corporation [Member] Developed Technology Rights [Member]	Dec. 28, 2013 Comfortaire Corporation [Member] Customer Lists [Member]
Definite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets	$ 7,745	$ 503	$ 5,231	[1]	$ 402	$ 2,413	[1]	$ 0	$ 101	$ 101
Finite-Lived Intangible Assets, Accumulated Amortization	1,281	472	850		371	330		0	101	101
Comfortaire purchase											$ 4,829	$ 2,413

[1] On January 17, 2013, in connection with the purchase of the business and assets of Comfortaire, we acquired definite-lived intangible assets, including developed technologies of $4.8 million and customer relationships of $2.4 million.