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Commitments and Contingencies (Future Minimum Lease Payments) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]    
Operating Leases, Rent Expense $ 10.7us-gaap_LeaseAndRentalExpense $ 10.3us-gaap_LeaseAndRentalExpense
2015 10.3us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent  
2016 8.1us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears  
2017 6.1us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears  
2018 4.5us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears  
2019 3.4us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears  
Thereafter 30.6us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter  
Total $ 63.0us-gaap_OperatingLeasesFutureMinimumPaymentsDue