Fair Value (Details 1) (USD $) In Thousands, unless otherwise specified	9 Months Ended
Sep. 29, 2012	Oct. 01, 2011
Liabilities included in level 3 representing fair value of contingent consideration associated with acquisitions
Beginning Balance	$ 3,911
Payments	(39)	0
Ending Balance	4,108
Fair Value Measurements, Level 3 [Member]
Liabilities included in level 3 representing fair value of contingent consideration associated with acquisitions
Beginning Balance	3,911
Payments	(39)
Adjustments	236
Ending Balance	$ 4,108

Fair value, as of the acquisition date, of potential payments under the contingent consideration arrangement including cash and shares.

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+ Details