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Acquisitions - Additional Information (Details)
$ in Millions
12 Months Ended
Jan. 05, 2016
USD ($)
Dec. 31, 2017
USD ($)
Business
Dec. 31, 2016
USD ($)
Dec. 31, 2014
USD ($)
Business Acquisition [Line Items]        
Number of businesses acquired | Business   2    
Business acquisition cash paid   $ 64.1    
Contingent consideration liability   2.9    
Goodwill   $ 110.1    
Debt instrument, interest rate   4.70%    
Luminati | 8% convertible secured promissory note        
Business Acquisition [Line Items]        
Debt instrument, interest rate     8.00%  
Face value     $ 10.0  
Debt instrument, maturity year     2023  
OPM        
Business Acquisition [Line Items]        
Business combination returned shares value   $ 20.0    
Purchase price     $ 15.0  
Structil SA and Aerospace and OPM        
Business Acquisition [Line Items]        
Goodwill   38.0    
Recognized intangiable assets and liabilities   $ 32.0    
Formax        
Business Acquisition [Line Items]        
Business acquisition cash paid $ 9.0      
Goodwill 10.2      
Purchase price $ 12.0     $ 22.0
Percentage of ownership interest acquired 50.00%     50.00%
Remaining installments payment period 4 years      
Long-term debt assumed       $ 8.2