Property, Plant And Equipment (Schedule Of Depreciation Expense) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 30, 2014	Mar. 31, 2013
Depreciation Expense [Line Items]
Depreciation Expense	$ 6,783	$ 6,925
Cost Of Sales [Member]
Depreciation Expense [Line Items]
Depreciation Expense	6,052	6,265
Selling, General And Administrative Expenses [Member]
Depreciation Expense [Line Items]
Depreciation Expense	$ 731	$ 660