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Investments - Components of Company's Available-for-Sale Investments (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Jun. 30, 2012
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Continuous Unrealized Loss Position, Less Than 12 Months, Fair Value	$ 261	$ 4,962
Available-for-sale securities, Continuous Unrealized Loss Position, Less Than 12 Months, Gross Unrealized Losses	(13)	(245)
Available-for-sale securities, Continuous Unrealized Loss Position, 12 Months or Greater, Fair Value	4,712
Available-for-sale securities, Continuous Unrealized Loss Position, 12 Months or Greater, Gross Unrealized Losses	(288)
Available-for-sale securities, Continuous Unrealized Loss Position, Fair Value, Total	4,973	4,962
Available-for-sale securities, Continuous Unrealized Loss Position, Gross Unrealized Losses, Total	(301)	(245)
Common stock [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Continuous Unrealized Loss Position, Less Than 12 Months, Fair Value	95	135
Available-for-sale securities, Continuous Unrealized Loss Position, Less Than 12 Months, Gross Unrealized Losses	(5)	(52)
Available-for-sale securities, Continuous Unrealized Loss Position, 12 Months or Greater, Fair Value
Available-for-sale securities, Continuous Unrealized Loss Position, 12 Months or Greater, Gross Unrealized Losses
Available-for-sale securities, Continuous Unrealized Loss Position, Fair Value, Total	95	135
Available-for-sale securities, Continuous Unrealized Loss Position, Gross Unrealized Losses, Total	(5)	(52)
Venture capital investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Continuous Unrealized Loss Position, Less Than 12 Months, Fair Value	163
Available-for-sale securities, Continuous Unrealized Loss Position, Less Than 12 Months, Gross Unrealized Losses	(5)
Available-for-sale securities, Continuous Unrealized Loss Position, 12 Months or Greater, Fair Value
Available-for-sale securities, Continuous Unrealized Loss Position, 12 Months or Greater, Gross Unrealized Losses
Available-for-sale securities, Continuous Unrealized Loss Position, Fair Value, Total	163
Available-for-sale securities, Continuous Unrealized Loss Position, Gross Unrealized Losses, Total	(5)
Offshore fund [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Continuous Unrealized Loss Position, Less Than 12 Months, Fair Value		4,811
Available-for-sale securities, Continuous Unrealized Loss Position, Less Than 12 Months, Gross Unrealized Losses		(189)
Available-for-sale securities, Continuous Unrealized Loss Position, 12 Months or Greater, Fair Value	4,712
Available-for-sale securities, Continuous Unrealized Loss Position, 12 Months or Greater, Gross Unrealized Losses	(288)
Available-for-sale securities, Continuous Unrealized Loss Position, Fair Value, Total	4,712	4,811
Available-for-sale securities, Continuous Unrealized Loss Position, Gross Unrealized Losses, Total	(288)	(189)
Mutual funds [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Continuous Unrealized Loss Position, Less Than 12 Months, Fair Value	3	16
Available-for-sale securities, Continuous Unrealized Loss Position, Less Than 12 Months, Gross Unrealized Losses	(3)	(4)
Available-for-sale securities, Continuous Unrealized Loss Position, 12 Months or Greater, Fair Value
Available-for-sale securities, Continuous Unrealized Loss Position, 12 Months or Greater, Gross Unrealized Losses
Available-for-sale securities, Continuous Unrealized Loss Position, Fair Value, Total	3	16
Available-for-sale securities, Continuous Unrealized Loss Position, Gross Unrealized Losses, Total	$ (3)	$ (4)

X

- Definition

Amount of the excess of amortized cost basis over fair value of securities that have been in a loss position for twelve months or longer for securities which are categorized neither as held-to-maturity nor trading securities.

+ References

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