Retirement Benefits (Schedule of estimated remaining cash contributions) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012
United States Pension Plans of US Entity, Defined Benefit [Member]
Contributions	$ 4,500
United Kingdom Plan, Defined Benefit [Member]
Contributions	1,392
Japan Plan, Defined Benefit [Member]
Contributions	0
Switzerland Plan, Defined Benefit [Member]
Contributions	184
Other Postretirement Benefit Plans, Defined Benefit [Member]
Contributions	$ 3,256