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Goodwill and Intangible Assets - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Finite-Lived Intangible Assets [Line Items]    
Goodwill, impairment loss $ 186.5  
Amortization expense $ 30.9 $ 30.8
Minimum    
Finite-Lived Intangible Assets [Line Items]    
Estimated useful life of intangible assets 5 years  
Maximum    
Finite-Lived Intangible Assets [Line Items]    
Estimated useful life of intangible assets 20 years  
Weighted average    
Finite-Lived Intangible Assets [Line Items]    
Estimated useful life of intangible assets 15 years