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Auction Rate Securities - Additional Information (Detail) $ in Millions	3 Months Ended
	Sep. 30, 2015 USD ($)
Schedule of Available-for-sale Securities [Line Items]
Auction Rate Securities with fair value maturing from 2016 to 2018	$ 12.5
Auction rate securities with fair value having no stated maturity	$ 2.5
Maturity period one	2018
Auction Rate Securities Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
ARS investments redeemed at par value	$ 0.6

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- Definition

Auction rate securities maturing year of specified amount one.

+ References

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- Definition

Auction rate securities with fair value having no stated maturity.

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- Definition

Auction rate securities with fair value maturing within specified period.

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- Definition

The aggregate value of securities held, which were categorized neither as trading nor held-to-maturity, for which the interest rate reset through an auction process, that failed to be liquidated through auction, and which were sold at par value during the period.

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No definition available.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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