Income Taxes (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Income Taxes [Abstract]
Income tax benefits attributable to equity-based compensation	$ 6,100,000	$ 3,300,000	$ (400,000)
Tax expense/(benefit) related to changes in pension and post-retirement plan assets and benefit obligations	(44,100,000)	6,600,000	700,000
Tax loss and credit carryforwards	93,337,000	78,289,000
Unrealized tax asset on related tax loss	58,100,000
Valuation allowance against U.S. and non-U.S. deferred tax assets	49,400,000
Total valuation allowance	107,511,000	62,830,000
Increase in total amount of unrecognized tax benefits that would impact effective tax rate	9,300,000	2,800,000	7,300,000
Unrecognized tax benefits, interest income	200,000	400,000	100,000
Interest expense and penalties, related to unrecognized tax benefits	$ 1,100,000