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Commitments and Contingencies (Detail)
$ in Millions
2 Months Ended 12 Months Ended
Jan. 31, 2011
USD ($)
assessment
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Dec. 31, 2014
USD ($)
Commitments And Contingencies [Line Items]          
Lease expense incurred   $ 5.4 $ 6.0 $ 5.0  
2019   2.0      
2020   1.5      
2021   0.8      
2022   0.5      
2023   0.4      
Thereafter   $ 4.2      
Brazil          
Commitments And Contingencies [Line Items]          
Number of tax assessments | assessment 2        
Value of assessments served on Brazilian subsidiary $ 13.0        
Court deposit       $ 8.8 $ 8.8