Financial Instruments (Fair Values Of Derivative Instruments Designated As Hedging Instruments) (Details) (Designated As Hedging Instrument [Member], USD $) In Thousands, unless otherwise specified	Apr. 01, 2012	Dec. 31, 2011
Derivatives, Fair Value [Line Items]
Total asset derivatives	$ 1,432	$ 204
Total liability derivatives	1,496	633
Other Assets - Current [Member] | Foreign Exchange Contracts [Member]
Derivatives, Fair Value [Line Items]
Total asset derivatives	1,432	204
Derivative Liabilities - Current [Member] | Foreign Exchange Contracts [Member]
Derivatives, Fair Value [Line Items]
Total liability derivatives	$ 1,496	$ 633