Derivative Instruments and Hedging Activities (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011	Apr. 02, 2011
Derivative contracts
Assets	$ 840	$ 546	$ 3,343
Liabilities	(59)	(138)	(83)
Derivatives designated as hedging instruments:
Derivative contracts
Assets	840	546	3,343
Liabilities	(59)	(138)	(80)
Derivatives designated as hedging instruments: | Foreign currency forward contracts
Derivative contracts
Notional Amounts	8,698	13,044	1,986
Assets	308	205	600
Derivatives designated as hedging instruments: | Commodity futures contracts
Derivative contracts
Notional Amounts	5,623	4,557	12,545
Assets	499	341	438
Liabilities	(59)	(138)	(65)
Derivatives designated as hedging instruments: | Commodity option contracts
Derivative contracts
Notional Amounts	1,701		5,628
Assets	33		2,305
Liabilities			(15)
Derivatives not designated as hedging instruments:
Derivative contracts
Liabilities			(3)
Derivatives not designated as hedging instruments: | Commodity futures contracts
Derivative contracts
Notional Amounts	850
Derivatives not designated as hedging instruments: | Commodity option contracts
Derivative contracts
Notional Amounts			1,680
Liabilities			$ (3)