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Fair Value Measurements, Marketable Securities and Variable Interest Entities - Schedule of Unrealized Gains and Losses Related to Cash Equivalents and Available-For-Sale Securities (Detail) - USD ($) $ in Thousands	Jun. 30, 2015	Jun. 30, 2014
Schedule of Available-for-sale Securities [Line Items]
Gross Amortized Cost		$ 77,783
Gross Unrealized Gains		4
Gross Unrealized Losses		37
Estimated Fair Value		77,750
U.S. municipal securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross Amortized Cost		12,812
Gross Unrealized Gains		4
Estimated Fair Value		12,816
Certificates of deposit [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross Amortized Cost		26,330
Gross Unrealized Losses		37
Estimated Fair Value		26,293
Money market funds [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross Amortized Cost	$ 20,156	38,641
Estimated Fair Value	$ 20,156	$ 38,641

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- Definition

Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in equity securities classified as available-for-sale.

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Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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