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	Jun. 28, 2015	Dec. 31, 2014
Derivatives, Fair Value [Line Items]
Gross Amounts of Recognized Assets	$ 509	$ 2,416
Gross Amounts of Recognized Liabilities	2,213	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	439	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	70	0
Other Accrued Liabilities [Member] | Derivatives Not Designated As Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Gross Amounts of Recognized Liabilities	2,142	409
Other Accrued Liabilities [Member] | Derivatives Designated As Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Gross Amounts of Recognized Liabilities	$ 71	$ 38