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Income Taxes - Additional Information (Detail) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Jun. 30, 2018
Income Tax Contingency [Line Items] |  |  |
U.S. statutory rate | 21.00% |  |
Effective income tax rate | 19.10% | 21.40% |
Unrecognized tax benefits that would impact effective tax rate | $ 13.8 |  | $ 9.9
Interest and penalties accrued | 0.7 |  | $ 0.6
Liability for uncertain tax positions that would impact the effective tax rate if recognized | $ 5.7 |  |
New Jersey |  |  |
Income Tax Contingency [Line Items] |  |  |
Income tax examination, year(s) under examination | 2014 2015 2016 2017 |  |
United States Internal Revenue Service |  |  |
Income Tax Contingency [Line Items] |  |  |
Tax year remain open to examination | 2015 2016 2017 2018 |  |
State Jurisdictions |  |  |
Income Tax Contingency [Line Items] |  |  |
Tax year remain open to examination | 2014 2015 2016 2017 2018 |  |
Foreign Taxing Jurisdictions |  |  |
Income Tax Contingency [Line Items] |  |  |
Tax year remain open to examination | 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 |  |
U.S. Federal |  |  |
Income Tax Contingency [Line Items] |  |  |
Income tax examination, year(s) under examination | 2016 |  |
Subsidiaries in Philippines |  |  |
Income Tax Contingency [Line Items] |  |  |
Income tax examination, year(s) under examination | 2017 |  |
Subsidiary in Germany |  |  |
Income Tax Contingency [Line Items] |  |  |
Income tax examination, year(s) under examination | 2012 2013 2014 2015 |  |

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