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Income Taxes - Additional Information (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2018
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Income Tax [Line Items]          
Deferred tax asset, federal net operating loss carryforwards $ 0.5 $ 0.5 $ 1.1    
Deferred tax asset, state net operating loss carryforwards 7.3 7.3 8.3    
Deferred tax asset, foreign net operating loss carryforwards 13.8 13.8 9.1    
Deferred tax asset, U.S. research tax credit carryforwards 1.1 1.1 1.1    
Deferred tax asset, U.S. foreign tax credits carryforwards 3.1 3.1 3.0    
Valuation allowance 9.4 9.4 10.6    
Total deferred tax assets 70.2 70.2 64.2    
Income taxes paid   $ 21.6 $ 13.9 $ 13.3  
Statutory federal income tax rate   21.00% 35.00% 35.00%  
Unrecognized tax benefits 1.6 $ 1.6 $ 1.9 $ 1.8 $ 2.2
Accrual for interest and penalties 0.6 0.6 0.6    
Reserves for unrecognized tax benefits, including interest and penalties 2.1 2.1 2.2    
Change in valuation allowance     2.2 [1] 2.2  
Income tax expense   17.9 $ 0.5 $ 17.4  
Spain tax planning strategy benefit $ 8.6 $ 8.6      
Effective income tax rate   16.00% 0.80% 30.60%  
Tax Act transition tax, rate applied to cash 15.50% 15.50%      
Tax Act transition tax, rate applied to earnings in excess of cash 8.00% 8.00%      
Research Tax Credit Carryforward          
Income Tax [Line Items]          
Deferred tax asset, tax credit carryforwards expiration year   2019      
Canada          
Income Tax [Line Items]          
Change in valuation allowance       $ (3.5)  
U.S. federal          
Income Tax [Line Items]          
Deferred tax asset, net operating loss carryforwards expiration year   2027      
Change in enacted tax rate     $ 23.0    
U.S. federal | Foreign Tax Credit Carryforward          
Income Tax [Line Items]          
Valuation allowance $ 3.1 $ 3.1 3.0    
U.S. state          
Income Tax [Line Items]          
Deferred tax asset, net operating loss carryforwards expiration year   2019      
Valuation allowance 5.3 $ 5.3      
Change in valuation allowance     0.8    
Change in enacted tax rate     0.6    
Foreign          
Income Tax [Line Items]          
Deferred tax asset, net operating loss carryforwards expiration year   2025      
Deferred tax asset, tax credit carryforwards expiration year   2023      
Valuation allowance 1.0 $ 1.0      
United Kingdom          
Income Tax [Line Items]          
Valuation allowance $ 0.8 0.8      
Change in valuation allowance       $ (1.3)  
Current Deferred Tax Assets          
Income Tax [Line Items]          
Unrecognized tax benefits, period increase (decrease)   $ 0.1 $ 0.3    
[1] Relates to continuing operations only.