Provision For Income Taxes (Summary Of Income Tax Examinations) (Details)	12 Months Ended
	Dec. 31, 2011
United States [Member]
Income Tax Examination [Line Items]
Tax years	2005, 2008 – 2011
Kentucky [Member]
Income Tax Examination [Line Items]
Tax years	2007 – 2011
Pennsylvania [Member]
Income Tax Examination [Line Items]
Tax years	2008 – 2011
Belgium [Member]
Income Tax Examination [Line Items]
Tax years	2009 – 2011
Canada [Member]
Income Tax Examination [Line Items]
Tax years	2007 – 2011
Germany [Member]
Income Tax Examination [Line Items]
Tax years	2008 – 2011
United Kingdom [Member]
Income Tax Examination [Line Items]
Tax years	2008 – 2011
Japan [Member]
Income Tax Examination [Line Items]
Tax years	2006 – 2011