Income Taxes (Remaining Tax Years Subject to Examination) (Details)	12 Months Ended
	Dec. 31, 2012
United States [Member]
Remaining tax years subject to examination	2010 to 2012
United Kingdom [Member]
Remaining tax years subject to examination	2011 to 2012
Canada [Member]
Remaining tax years subject to examination	2008 to 2012
Korea [Member]
Remaining tax years subject to examination	2007 to 2012
Australia [Member]
Remaining tax years subject to examination	2008 to 2012