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Income Taxes - Additional Information (Detail) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Mar. 31, 2015
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2015
Dec. 31, 2014
Jun. 30, 2015
Income Tax Disclosure [Line Items]            
Provision for income taxes   $ 9.5 $ 8.3 $ 18.7 $ 18.6  
Provision for income taxes excluding impact for contingent consideration     $ 9.2   $ 20.5  
Federal research and development credits   3.1   3.1    
Gross unrecognized tax benefits   13.9   13.9   $ 11.6
Gross unrecognized tax benefits related to uncertain tax position increased during the year       2.3    
Interest and penalties accrued related to unrecognized tax benefits   1.4   1.4    
Increase in interest and penalties accrued related to unrecognized tax benefits       0.3    
Maximum [Member]            
Income Tax Disclosure [Line Items]            
Change in unrecognized tax benefits is reasonably possible, amount of unrecorded benefit   $ 1.0   $ 1.0    
Japan [Member]            
Income Tax Disclosure [Line Items]            
Expected reduction of corporate income tax 3.29%          
Effective tax rate 35.60%          
Expected national and local effective tax rate percentage 32.30%          
National Tax Agency Japan            
Income Tax Disclosure [Line Items]            
Open tax year       2015