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New and Recently Adopted Accounting Standards (Details) - USD ($)
$ in Millions
Sep. 30, 2016
Dec. 31, 2015
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Less unamortized debt issuance costs $ 13.0 $ 12.3
Other Long-term Assets | Adjustments for ASU 2015-03    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Less unamortized debt issuance costs   $ (12.3)