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Committments and Contingent Liabilities (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Commitments and Contingencies Disclosure [Abstract]      
2013 $ 2.6    
2014 2.5    
2015 2.1    
2016 1.7    
2017 1.7    
Unrecorded Unconditional Purchase Obligation, Due after Five Years 6.1    
Total 16.7    
Sub lease income 0.7    
Operating Leases, Rent Expense $ 9.2 $ 8.3 $ 9.5