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Acquisitions - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Jun. 02, 2017
Sep. 30, 2017
Sep. 30, 2017
Sep. 30, 2016
Business Acquisition [Line Items]        
Acquisition related costs   $ 0.5 $ 1.5 $ 0.9
Finite-lived intangible asset, useful life     12 years  
TBEI [Member]        
Business Acquisition [Line Items]        
Percentage of voting interests acquired 100.00%      
Purchase price, inclusive of preliminary working capital adjustment $ 271.8      
Customer Relationships        
Business Acquisition [Line Items]        
Finite-lived intangible asset, useful life     12 years