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Goodwill and Other Intangible Assets - Narrative (Details)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2016
USD ($)
Jun. 30, 2015
USD ($)
Jun. 30, 2016
USD ($)
segment
Jun. 30, 2015
USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]        
Number of reportable segments | segment     1  
Accumulated asset impairments     $ 0.0  
Amortization expense $ 0.8 $ 0.7 $ 1.5 $ 1.5