Divestiture-Related Activities (Schedule Of Operating Results Of Operations Treated As Discontinued Operations) (Details) (USD $) In Thousands	3 Months Ended				6 Months Ended
	Jun. 26, 2011		Jun. 27, 2010		Jun. 26, 2011		Jun. 27, 2010
Divestiture-Related Activities
Net revenues	$ 53,299		$ 122,073		$ 140,352		$ 218,194
Costs and other expenses	53,155		105,264		133,045		196,747
Gain (loss) on disposition	(4,504)	[1]	28,825	[1]	52,269	[1]	38,562	[1]
Income from discontinued operations before income taxes	(4,360)		45,634		59,576		60,009
Provision for income taxes	(7,260)	[2]	17,454	[2]	(7,521)	[2]	26,620	[2]
Income (loss) from discontinued operations	2,900		28,180		67,097		33,389
Less: Income from discontinued operations attributable to noncontrolling interest	159		119		318		233
Income from discontinued operations attributable to common shareholders	$ 2,741		$ 28,061		$ 66,779		$ 33,156

[1] Gain on disposition during the first quarter of 2011 includes curtailment and settlement losses of approximately $11.5 million on the pension and postretirement obligations that were transferred to the buyer in connection with the sale of the marine business. The loss on disposition during the second quarter of 2011 includes an adjustment to the pension and postretirement liabilities of $3.5 million.

[2] The provision for income taxes for the three months ended June 26, 2011 was impacted favorably by the realization of net tax benefits resulting from the resolution (including the expiration of statutes of limitation) of U.S. federal, state, and foreign tax matters relating to prior years. In addition, the provision for income taxes for the six months ended June 26, 2011 was further impacted favorably by tax on the sale of the marine business being incurred at significantly lower than statutory effective tax rates.