Income Taxes (Summary Of Open Tax Years, By Jurisdiction) (Details)	12 Months Ended
	Dec. 31, 2013
United States [Member]
Income Tax Contingency [Line Items]
Open tax years, by jurisdiction	2012
Various U.S. States [Member]
Income Tax Contingency [Line Items]
Open tax years, by jurisdiction	2009
South Africa [Member]
Income Tax Contingency [Line Items]
Open tax years, by jurisdiction	2008