Derivative Instruments and Hedging Activities (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 30, 2013	Mar. 31, 2012
Effect of derivative instruments on earnings
Gain (Loss) Recognized in OCI	$ (930)	$ 506
Gain (Loss) Reclassified from Accumulated OCI into Earnings	(355)	167
Foreign currency forward contracts
Effect of derivative instruments on earnings
Gain (Loss) Recognized in OCI	(282)	252
Gain (Loss) Reclassified from Accumulated OCI into Earnings	(35)	149
Commodity futures contracts
Effect of derivative instruments on earnings
Gain (Loss) Recognized in OCI	(648)	256
Gain (Loss) Reclassified from Accumulated OCI into Earnings	(320)	18
Commodity option contracts
Effect of derivative instruments on earnings
Gain (Loss) Recognized in OCI		(2)
Commodity option and future contracts
Effect of derivative instruments on earnings
Recognized earnings (loss) related to mark-to-market accounting	$ (8)	$ 46