Summary Of Significant Accounting Policies (Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 30, 2014		Mar. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Cost of revenues - foreign currency revenue forecast contracts	$ 85,120		$ 94,907
Net loss from continuing operations	(129)		(4,925)
Tax benefit	(1,220)		0
Reclassification Out Of Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net of tax	(278)		(124)
Reclassification Out Of Accumulated Other Comprehensive Income (Loss) [Member] | Amortization of Pension Plan Items [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Actuarial loss	(385)	[1]	(389)	[1]
Prior service cost	(3)		(1)
Net loss from continuing operations	(388)		(390)
Tax benefit	110		108
Net of tax	(278)		(282)
Reclassification Out Of Accumulated Other Comprehensive Income (Loss) [Member] | Gains and Losses on Cash flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Cost of revenues - foreign currency revenue forecast contracts	0		158
Net loss from continuing operations	0		158
Tax benefit	0		0
Net of tax	$ 0		$ 158

[1] These accumulated other comprehensive income components are included in the computation of net periodic pension costs. Refer to Note 9 of the Consolidated Financial Statements.