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Significant Accounting Policies (Details) - Accounting Standards Update 2015-03 - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2015
Dec. 31, 2015
Corporate Expense    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Amortization of debt issuance costs $ (0.4)  
Interest Expense    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Amortization of debt issuance costs $ 0.4  
Debt    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Deferred debt issuance costs   $ 5.6
Other Assets    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Deferred debt issuance costs   $ (5.6)