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Income Taxes - Additional Information (Detail) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Income Tax Contingency [Line Items]            
Reduction in unrecognized tax benefits       $ 0.2 $ 0.2  
Accrued net interest and penalties $ 0.2   $ 0.2      
Unrecognized tax benefits, income tax interest and penalties accrued 0.3   0.3 0.1    
Unrecognized tax benefits, interest and penalties 2.5   2.5      
Unrecognized tax benefit 2.2   $ 2.2 2.2 3.6 $ 5.7
Income tax examination, description     The Company and its U.S. subsidiaries remain open to examination by the IRS for years 2014 onwards. The Company’s subsidiaries in foreign tax jurisdictions are open to examination including France (2014 onwards), Germany (2015 onwards), Switzerland (2015 onwards) and the United Kingdom (2016 onwards).      
Cash payments for income taxes     $ 24.2 $ 23.1 $ 22.5  
Increase to income tax expense     $ 47.7      
Statutory income tax rate     35.00% 35.00% 35.00%  
Deferred income tax benefit     $ (6.8) $ 1.0 $ 12.0  
Gross net operating loss carry forwards deferred tax asset 15.9   15.9 18.2    
Deferred tax assets valuation allowance 0.0   0.0 $ 0.0    
Operating loss carry forwards 75.2   75.2      
Forecast [Member]            
Income Tax Contingency [Line Items]            
Statutory income tax rate   21.00%        
Italian Tax Authorities [Member]            
Income Tax Contingency [Line Items]            
Additional tax due 0.5   0.5      
Income tax interest expense 0.2          
Unrecognized tax benefit 0.7   0.7      
Federal [Member]            
Income Tax Contingency [Line Items]            
Operating loss carry forwards 16.6   16.6      
State [Member]            
Income Tax Contingency [Line Items]            
Operating loss carry forwards 10.5   10.5      
Foreign [Member]            
Income Tax Contingency [Line Items]            
Operating loss carry forwards 48.1   48.1      
Tax Cuts and Jobs Act [Member]            
Income Tax Contingency [Line Items]            
Deferred income tax benefit     (7.1)      
Deferred tax liability decrease (7.1)   $ (7.1)      
France [Member]            
Income Tax Contingency [Line Items]            
Open tax year     2014      
Germany [Member]            
Income Tax Contingency [Line Items]            
Open tax year     2015      
Switzerland [Member]            
Income Tax Contingency [Line Items]            
Open tax year     2015      
United Kingdom [Member]            
Income Tax Contingency [Line Items]            
Open tax year     2016      
United States [Member]            
Income Tax Contingency [Line Items]            
Operating loss carry forwards $ 27.1   $ 27.1