Derivative Instruments and Hedging Activities (Details) (USD $) In Thousands, unless otherwise specified	Jun. 29, 2013	Dec. 31, 2012	Jun. 30, 2012
Derivative contracts
Assets	$ 25	$ 189	$ 141
Liabilities	(1,007)	(301)	(221)
Derivatives designated as hedging instruments:
Derivative contracts
Assets		127	127
Liabilities	(1,005)	(301)	(188)
Derivatives designated as hedging instruments: | Foreign currency forward contracts
Derivative contracts
Notional Amounts	23,383		4,350
Assets			70
Liabilities	(759)
Derivatives designated as hedging instruments: | Commodity futures contracts, net
Derivative contracts
Notional Amounts	1,600	7,868	3,738
Assets		127	56
Liabilities	(246)	(301)	(188)
Derivatives designated as hedging instruments: | Commodity option contracts
Derivative contracts
Notional Amounts			171
Assets			1
Derivatives not designated as hedging instruments:
Derivative contracts
Assets	25	62	14
Liabilities	(2)		(33)
Derivatives not designated as hedging instruments: | Commodity futures contracts, net
Derivative contracts
Notional Amounts	1,272	627	1,290
Assets	25	62	14
Liabilities	$ (2)		$ (33)