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Income Taxes (Details) - USD ($)
$ in Millions
Sep. 30, 2017
Dec. 31, 2016
Income Tax Disclosure [Abstract]    
Deferred Tax Assets, Net $ 1.0 $ 1.1
Unrecognized Tax Benefits 3.7  
Unrecognized Tax Benefits, Interest on Income Taxes Accrued 0.9  
Unrecognized Tax Benefits, Income Tax Penalties Accrued 0.2  
Uncertain Tax Positions $ 0.2