Retirement Benefits (Schedule of estimated remaining cash contributions) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011
Pension Costs [Member] | United States Pension Plans of US Entity, Defined Benefit [Member]
Contributions	$ 450
Pension Costs [Member] | United Kingdom Plan, Defined Benefit [Member]
Contributions	1,315
Pension Costs [Member] | Japan Plan, Defined Benefit [Member]
Contributions	0
Pension Costs [Member] | Switzerland Plan, Defined Benefit [Member]
Contributions	191
Other Postretirement Benefit Costs [Member]
Contributions	$ 4,209