Commitments And Contingent Liabilities (Schedule Of Estimated Product Warranty Liability) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Sep. 25, 2011	Dec. 31, 2011
Commitments And Contingent Liabilities [Abstract]
Balance - December 31, 2010		$ 10,877
Accruals for warranties issued in 2011		68
Settlements (cash and in kind)	7,600	(125)
Accruals related to pre-existing warranties		3,983	[1]
Businesses sold		(6,868)
Balance - December 31, 2011		$ 7,935

[1] Including those related to divested businesses.