Business Segment Information (Schedule Of Reconciliation Of Segment Expenditures For Property, Plant And Equipment To Condensed Consolidated Total Expenditures For Property, Plant And Equipment) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Apr. 01, 2012	Mar. 27, 2011
Segment Reporting, Other Significant Reconciling Item [Line Items]
Expenditures for property, plant and equipment	$ 15,029	$ 5,891
Parent Company [Member]
Segment Reporting, Other Significant Reconciling Item [Line Items]
Expenditures for property, plant and equipment	3,588	64
Segment [Member]
Segment Reporting, Other Significant Reconciling Item [Line Items]
Expenditures for property, plant and equipment	11,441	5,827
Corporate [Member]
Segment Reporting, Other Significant Reconciling Item [Line Items]
Expenditures for property, plant and equipment	$ 3,588	$ 64