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Committments and Contingent Liabilities (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]      
2014 $ 2.4    
2015 2.6    
2016 2.6    
2017 2.0    
2018 1.9    
After 2018 2.9    
Total 14.4    
Operating Leases, Rent Expense $ 10.5 $ 9.1 $ 9.2