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Income Taxes - Additional Information (Detail) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Jun. 30, 2014
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Jun. 30, 2013
Dec. 31, 2012
Income Tax [Line Items]                
Accumulated undistributed earnings of certain foreign subsidiaries $ 28.0 $ 25.2   $ 28.0 $ 25.2      
Deferred tax asset, federal net operating loss carryforwards 4.0 5.1   4.0 5.1      
Deferred tax asset, state net operating loss carryforwards 6.8 5.7   6.8 5.7      
Deferred tax asset, foreign net operating loss carryforwards 5.2 3.0   5.2 3.0      
Deferred Tax Assets, Tax Credit Carryforwards, Alternative Motor Vehicle Credits   0.2     0.2      
Deferred tax asset, U.S. research tax credit carryforwards 1.5 5.0   1.5 5.0      
Deferred tax asset, U.S. foreign tax credits carryforwards 8.3 22.3   8.3 22.3      
Deferred tax asset, U.S. alternative minimum tax credits carryforwards 3.3 3.3   3.3 3.3      
Deferred tax asset, valuation allowance 5.9 3.8   5.9 3.8   $ 10.4  
Total deferred tax assets 96.6 117.4   96.6 117.4      
Income taxes paid       9.6 7.2 $ 1.3    
Unrecognized tax benefits 2.2 2.0   2.2 2.0 3.9   $ 4.0
Unrecognized tax benefits that, interests 0.8 0.8   0.8 0.8      
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued 2.5 2.5   2.5 2.5      
Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Amount         (3.4)      
Decrease in valuation allowance 3.5 6.7 $ 102.4          
Income tax expense (benefit) (1.4) (3.5)   $ 34.1 $ 23.7 $ (108.6)    
Effective Income Tax Rate Reconciliation, Percent       34.10% 28.40% (247.40%)    
Benefit associated with tax planning strategy 4.2     $ 4.2        
Adjustment of deferred tax assets $ 2.4     2.4        
Unrecognized tax benefits, period increase (decrease)       (1.0)        
Change in enacted tax rate       $ 0.4        
Research Tax Credit Carryforward                
Income Tax [Line Items]                
Deferred tax asset, tax credit carryforwards expiration year       2019        
Internal Revenue Service (IRS)                
Income Tax [Line Items]                
Deferred tax asset, net operating loss carryforwards expiration year       2027        
State and Local Jurisdiction                
Income Tax [Line Items]                
Deferred tax asset, net operating loss carryforwards expiration year       2016        
Foreign Tax Authority                
Income Tax [Line Items]                
Deferred tax asset, tax credit carryforwards expiration year       2021        
Current Deferred Tax Assets [Member]                
Income Tax [Line Items]                
Unrecognized tax benefits, period increase (decrease)       $ (0.5) $ (0.3)      
Impact of Adoption                
Income Tax [Line Items]                
Deferred tax assets   $ (18.8)     $ (18.8)