Financial Instruments (Details 1) (USD $) In Thousands			9 Months Ended
Oct. 01, 2011	Jan. 01, 2011	Oct. 01, 2011 Fair Value Measurements, Level 3 [Member]
Liabilities included in level 3 representing fair value of contingent consideration associated with acquisitions
Balance as of January 1, 2011	$ 3,745	$ 966	$ 966
Additions			3,521
Adjustments			(835)
Accretion			93
Balance as of October 1, 2011	$ 3,745	$ 966	$ 3,745

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

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+ Details