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Employee Benefit Plans - Additional Information (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2018
USD ($)
pension_plan
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Defined Benefit Plan Disclosure [Line Items]      
Defined contribution plan expense $ 6.8 $ 6.4 $ 6.1
Number of defined benefit pension plans | pension_plan 4    
Actuarial losses arising during period, net of tax $ 0.7 (0.7) 5.6
Non-Qualified Supplemental Retirement Plan      
Defined Benefit Plan Disclosure [Line Items]      
Actuarial losses arising during period, before tax 0.1    
Actuarial losses arising during period, net of tax 0.1    
Amortization of recognized actuarial loss 0.1    
Amortization of gains (losses), net of tax 0.1    
Foreign Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Expected future amortization of gain (loss) 0.5    
Amortization of recognized actuarial loss $ 0.5 $ 0.5 $ 0.3