Retirement Plans (Benefit Payments) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013
United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Benefit Payments, Next Twelve Months	$ 759
Defined Benefit Plan, Expected Future Benefit Payments, Year Two	773
Defined Benefit Plan, Expected Future Benefit Payments, Year Three	802
Defined Benefit Plan, Expected Future Benefit Payments, Year Four	878
Defined Benefit Plan, Expected Future Benefit Payments, Year Five	912
Defined Benefit Plan, Expected Future Benefit Payments, Five Fiscal Years Thereafter	5,394
United Kingdom Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Benefit Payments, Next Twelve Months	231
Defined Benefit Plan, Expected Future Benefit Payments, Year Two	256
Defined Benefit Plan, Expected Future Benefit Payments, Year Three	290
Defined Benefit Plan, Expected Future Benefit Payments, Year Four	313
Defined Benefit Plan, Expected Future Benefit Payments, Year Five	333
Defined Benefit Plan, Expected Future Benefit Payments, Five Fiscal Years Thereafter	$ 2,103