Derivative Instruments and Hedging Activities (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Apr. 02, 2011
Effect of derivative instruments on earnings
Gain (Loss) Recognized in OCI	$ 506	$ (859)
Gain (Loss) Reclassified from Accumulated OCI into Earnings	167	4,394
Foreign currency forward contracts
Effect of derivative instruments on earnings
Gain (Loss) Recognized in OCI	252	108
Gain (Loss) Reclassified from Accumulated OCI into Earnings	149	451
Commodity futures contracts
Effect of derivative instruments on earnings
Gain (Loss) Recognized in OCI	256	2,242
Gain (Loss) Reclassified from Accumulated OCI into Earnings	18	4,178
Commodity option contracts
Effect of derivative instruments on earnings
Gain (Loss) Recognized in OCI	(2)	(3,209)
Gain (Loss) Reclassified from Accumulated OCI into Earnings		(235)
Commodity option and future contracts
Effect of derivative instruments on earnings
Recognized earnings related to mark-to-market accounting	$ 46	$ 120