Derivative Instruments and Hedging Activities (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 29, 2013	Jun. 30, 2012	Jun. 29, 2013	Jun. 30, 2012
Effect of derivative instruments on earnings
Gain (Loss) Recognized in OCI	$ (802)	$ (699)	$ (1,732)	$ (193)
Gain (Loss) Reclassified from Accumulated OCI into Earnings	(546)	115	(901)	282
Foreign currency forward contracts
Effect of derivative instruments on earnings
Gain (Loss) Recognized in OCI	(585)	(124)	(867)	128
Gain (Loss) Reclassified from Accumulated OCI into Earnings	(73)	115	108	264
Commodity futures contracts
Effect of derivative instruments on earnings
Gain (Loss) Recognized in OCI	(217)	(543)	(865)	(287)
Gain (Loss) Reclassified from Accumulated OCI into Earnings	(473)	30	(793)	48
Commodity option contracts
Effect of derivative instruments on earnings
Gain (Loss) Recognized in OCI		(32)		(34)
Gain (Loss) Reclassified from Accumulated OCI into Earnings		(30)		(30)
Commodity option and future contracts
Effect of derivative instruments on earnings
Recognized earnings (loss) related to mark-to-market accounting	$ (31)	$ (39)	$ 7	$ 53