Derivative Instruments (Forward Contract Amounts Recorded In Consolidated Balance Sheet) (Details) (USD $) In Thousands	Oct. 01, 2011	Dec. 31, 2010
Derivatives, Fair Value [Line Items]
Total Assets	$ 7,111	$ 3,275
Total Liabilities	0	0
Prepaid Expenses And Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Total Assets	7,111	3,275
Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Total Liabilities	$ 0	$ 0