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Goodwill and Other Intangible Assets, Net (Details Textual) (USD $)	3 Months Ended
	Apr. 01, 2012	Apr. 03, 2011
Goodwill And Other Intangible Assets Net (Textual) [Abstract]
Impairment loss for indefinite lived intangible assets	$ 0
Amortization expense	$ 4,800,000	$ 4,100,000
Facility Management Contracts [Member]
Goodwill And Other Intangible Assets Net (Textual) [Abstract]
Weighted average period	1.4

For intangible assets acquired either individually or as part of a group of assets (in either an asset acquisition or business combination) which have renewal or extension terms, this element represents the weighted-average period prior to the next renewal or extension (both explicit and implicit), by major intangible asset class.

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