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Business Combination - Narrative (Details) - USD ($)
$ in Millions
1 Months Ended
Apr. 23, 2018
Sep. 11, 2017
Oct. 31, 2017
Lightning Diversion Systems, Inc.      
Business Acquisition [Line Items]      
Percentage of outstanding common stock acquired   100.00%  
Purchase price of acquisition   $ 60.0  
Preliminary purchase price allocation   62.0  
Borrowings from debt   $ 61.4 $ 0.6
Subsequent Event | Certified Thermoplastics Co., LLC      
Business Acquisition [Line Items]      
Percentage of outstanding common stock acquired 100.00%    
Purchase price of acquisition $ 30.5    
Borrowings from debt $ 31.1