Derivative Instruments and Hedging Activities (Details) (USD $) In Thousands, unless otherwise specified	Sep. 27, 2014	Dec. 31, 2013	Sep. 28, 2013
Derivative contracts
Assets	$ 20	$ 61	$ 192
Liabilities	(1,635)	(875)	(66)
Derivatives designated as hedging instruments:
Derivative contracts
Assets	20	41	143
Liabilities	(1,635)	(875)	(66)
Derivatives designated as hedging instruments: | Foreign currency forward contracts
Derivative contracts
Notional Amounts	33,291	34,244	30,181
Assets	20		29
Liabilities	(1,258)	(684)
Derivatives designated as hedging instruments: | Commodity futures contracts
Derivative contracts
Notional Amounts	3,352	5,601	4,376
Assets		41	114
Liabilities	(377)	(191)	(66)
Derivatives not designated as hedging instruments:
Derivative contracts
Assets		20	49
Derivatives not designated as hedging instruments: | Commodity futures contracts
Derivative contracts
Notional Amounts		321	871
Assets		$ 20	$ 49