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Acquisitions - Purchase Consideration (Details) - USD ($)
$ in Millions
Apr. 20, 2018
Apr. 06, 2018
Oct. 05, 2017
Jul. 05, 2017
Jun. 30, 2018
Sep. 30, 2017
Nov. 28, 2016
BioSpeciMan Corporation              
Business Acquisition [Line Items]              
Total purchase price $ 5.2            
Cash payment subject to working capital adjustments 5.2            
Working capital adjustment $ 0.5            
Tec-Sem Group AG              
Business Acquisition [Line Items]              
Total purchase price   $ 12.8          
Cash payment subject to working capital adjustments   $ 12.8          
4titude Limited              
Business Acquisition [Line Items]              
Total purchase price     $ 65.1        
Cash payment subject to working capital adjustments     64.8        
Liabilities incurred     $ 0.4        
PBMMI and Novare              
Business Acquisition [Line Items]              
Total purchase price       $ 34.3      
Cash payment subject to working capital adjustments       $ 34.3      
Cool Lab, LLC              
Business Acquisition [Line Items]              
Liabilities arising from contingencies, amount recognized         $ 0.8 $ 0.7 $ 0.7