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Basis of Presentation - Additional Information (Detail) - USD ($) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Mar. 31, 2017 | Mar. 31, 2016 | Mar. 31, 2017 | Mar. 31, 2016
Basis Of Presentation [Line Items] |  |  |  |
Net gain (loss) on foreign currency transactions | $ (400,000) | $ (3,300,000) | $ (400,000) | $ (5,100,000)
Forward Contracts |  |  |  |
Basis Of Presentation [Line Items] |  |  |  |
Net gain (loss) on foreign currency transactions |  |  | 0 | $ 4,800,000
Foreign currency forward contracts outstanding amount | $ 0 |  | $ 0 |

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