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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 |  |

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