Income Taxes - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	6 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Jun. 30, 2014
Income Tax Disclosure [Abstract]
Effective income tax rate	16.40%	23.70%
U.S. statutory rate	35.00%
U.S. research and development credits	$ 7.7
Unrecognized tax benefits that would impact effective tax rate	$ 3.2		$ 2.8

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 12

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-Publisher FASB

-Name Accounting Standards Codification

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-Section S99

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-Publisher SEC

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-Number 210

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

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-Name Accounting Standards Codification

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-Paragraph 1

-Subparagraph (SAB TOPIC 6.I)

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to research tax credit.

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The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

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