Derivative Financial Instruments (Schedule Of Fair Values Of The Company's Derivative Instruments And The Line Items On The Consolidated Balance Sheets) (Details) - USD ($) $ in Thousands	Sep. 27, 2015	Dec. 31, 2014
Derivatives, Fair Value [Line Items]
Gross Amounts of Recognized Assets	$ 537	$ 2,416
Gross Amounts of Recognized Liabilities	678	447
Prepaid Expenses And Other Current Assets [Member] | Derivatives Not Designated As Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Gross Amounts of Recognized Assets	505	2,416
Prepaid Expenses And Other Current Assets [Member] | Derivatives Designated As Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Gross Amounts of Recognized Assets	32	0
Other Accrued Liabilities [Member] | Derivatives Not Designated As Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Gross Amounts of Recognized Liabilities	641	409
Other Accrued Liabilities [Member] | Derivatives Designated As Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Gross Amounts of Recognized Liabilities	$ 37	$ 38