Commitments And Contingencies (Schedule Of Settlement And Defense Costs) (Details) (USD $)	3 Months Ended				12 Months Ended
	Mar. 31, 2012		Mar. 31, 2011		Dec. 31, 2011
Loss Contingencies [Line Items]
Pre-tax cash payments	$ (18,235,000)		$ (12,725,000)
Asbestos Commitments And Contingencies [Member]
Loss Contingencies [Line Items]
Settlement / indemnity costs incurred	10,400,000	[1]	16,200,000	[1]	50,200,000	[1]
Defense costs incurred	13,100,000	[1]	11,400,000	[1]	55,300,000	[1]
Total cost incurred	23,600,000		27,600,000		105,500,000
Settlement / indemnity payments	9,400,000		8,500,000		55,000,000
Defense payments	12,900,000		10,600,000		56,500,000
Insurance receipts	(4,000,000)		(6,400,000)		(32,200,000)
Pre-tax cash payments	$ 18,200,000		$ 12,700,000		$ 79,300,000

[1] Before insurance recoveries and tax effects.