Derivative Instruments and Hedging Activities (Details) (USD $) In Thousands, unless otherwise specified	Sep. 28, 2013	Dec. 31, 2012	Sep. 29, 2012
Derivative contracts
Assets	$ 192	$ 189	$ 153
Liabilities	(66)	(301)	(5)
Derivatives designated as hedging instruments:
Derivative contracts
Assets	143	127	53
Liabilities	(66)	(301)	(5)
Derivatives designated as hedging instruments: | Foreign currency forward contracts
Derivative contracts
Notional Amounts	30,181
Assets	29
Derivatives designated as hedging instruments: | Commodity futures contracts, net
Derivative contracts
Notional Amounts	4,376	7,868	2,252
Assets	114	127	53
Liabilities	(66)	(301)	(5)
Derivatives not designated as hedging instruments:
Derivative contracts
Assets	49	62	100
Derivatives not designated as hedging instruments: | Commodity futures contracts, net
Derivative contracts
Notional Amounts	871	627	841
Assets	$ 49	$ 62	$ 100