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Intangible Assets and Goodwill Narrative (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]      
Finite-Lived Intangible Assets, Period Increase (Decrease) $ (20.7)    
Finite-Lived Intangible Assets, Amortization Expense 1.4 $ 2.0 $ 2.6
Finite-Lived Intangible Assets, expected amortization expense, 2016 1.0    
Finite-Lived Intangible Assets, expected amortization expense, 2017 0.6    
Finite-Lived Intangible Assets, expected amortization expense, 2018 0.6    
Finite-Lived Intangible Assets, expected amortization expense, 2019 $ 0.5