Income Taxes (Details 6)	12 Months Ended
	Dec. 31, 2011
Germany [Member]
Open tax years by major jurisdiction
Open tax years by major jurisdiction	2006
Italy [Member]
Open tax years by major jurisdiction
Open tax years by major jurisdiction	2005
Netherlands [Member]
Open tax years by major jurisdiction
Open tax years by major jurisdiction	2008
United Kingdom [Member]
Open tax years by major jurisdiction
Open tax years by major jurisdiction	2008
United States [Member]
Open tax years by major jurisdiction
Open tax years by major jurisdiction	2007