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Acquisition (Details) - USD ($)
$ in Millions
Feb. 21, 2018
Sep. 30, 2018
Jun. 30, 2018
Business Acquisition [Line Items]      
Goodwill acquired   $ 268.7 $ 268.7
MB CalRAM LLC      
Business Acquisition [Line Items]      
Asset purchase price $ 13.3    
Working capital acquired     0.2
Property, plant, and equipment acquired     2.6
Identifiable intangible assets     5.2
Goodwill acquired     $ 5.3