Derivative Instruments and Hedging Activities (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011	Jul. 02, 2011
Derivative contracts
Assets	$ 141	$ 546	$ 1,549
Liabilities	(221)	(138)	(43)
Derivatives designated as hedging instruments:
Derivative contracts
Assets	127	546	1,549
Liabilities	(188)	(138)	(43)
Derivatives designated as hedging instruments: | Foreign currency forward contracts
Derivative contracts
Notional Amounts	4,350	13,044	1,192
Assets	70	205	368
Derivatives designated as hedging instruments: | Commodity futures contracts
Derivative contracts
Notional Amounts	3,738	4,557	7,773
Assets	56	341	615
Liabilities	(188)	(138)	(42)
Derivatives designated as hedging instruments: | Commodity option contracts
Derivative contracts
Notional Amounts	171		1,160
Assets	1		566
Liabilities			(1)
Derivatives not designated as hedging instruments:
Derivative contracts
Assets	14
Liabilities	(33)
Derivatives not designated as hedging instruments: | Commodity futures contracts
Derivative contracts
Notional Amounts	1,290
Assets	14
Liabilities	(33)
Derivatives not designated as hedging instruments: | Commodity option contracts
Derivative contracts
Notional Amounts			$ 370