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Investments - Summary of Gross Unrealized Losses and Fair Values of Available-For-Sale Investment Securities (Detail) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2013 | Jun. 30, 2013
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Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale securities, continuous unrealized loss position, less than 12 months, fair value | $ 2,906 | $ 261
Available-for-sale securities, continuous unrealized loss position, less than 12 months, accumulated loss | (278) | (13)
Available-for-sale securities, continuous unrealized loss position, 12 months or greater, fair value | 0 | 4,712
Available-for-sale securities, continuous unrealized loss position, 12 months or longer, accumulated loss | 0 | (288)
Available-for-sale securities, continuous unrealized loss position, fair value, total | 2,906 | 4,973
Available-for-sale securities, continuous unrealized loss position, gross unrealized losses, total | (278) | (301)
Common stock |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale securities, continuous unrealized loss position, less than 12 months, fair value | 322 | 95
Available-for-sale securities, continuous unrealized loss position, less than 12 months, accumulated loss | (11) | (5)
Available-for-sale securities, continuous unrealized loss position, 12 months or greater, fair value | 0 | 0
Available-for-sale securities, continuous unrealized loss position, 12 months or longer, accumulated loss | 0 | 0
Available-for-sale securities, continuous unrealized loss position, fair value, total | 322 | 95
Available-for-sale securities, continuous unrealized loss position, gross unrealized losses, total | (11) | (5)
Preferred stock |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale securities, continuous unrealized loss position, less than 12 months, fair value | 197 |
Available-for-sale securities, continuous unrealized loss position, less than 12 months, accumulated loss | (7) |
Available-for-sale securities, continuous unrealized loss position, 12 months or greater, fair value | 0 |
Available-for-sale securities, continuous unrealized loss position, 12 months or longer, accumulated loss | 0 |
Available-for-sale securities, continuous unrealized loss position, fair value, total | 197 |
Available-for-sale securities, continuous unrealized loss position, gross unrealized losses, total | (7) |
Corporate debt |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale securities, continuous unrealized loss position, less than 12 months, fair value | 1,242 |
Available-for-sale securities, continuous unrealized loss position, less than 12 months, accumulated loss | (226) |
Available-for-sale securities, continuous unrealized loss position, 12 months or greater, fair value | 0 |
Available-for-sale securities, continuous unrealized loss position, 12 months or longer, accumulated loss | 0 |
Available-for-sale securities, continuous unrealized loss position, fair value, total | 1,242 |
Available-for-sale securities, continuous unrealized loss position, gross unrealized losses, total | (226) |
Venture capital investments |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale securities, continuous unrealized loss position, less than 12 months, fair value | 163 | 163
Available-for-sale securities, continuous unrealized loss position, less than 12 months, accumulated loss | (5) | (5)
Available-for-sale securities, continuous unrealized loss position, 12 months or greater, fair value | 0 | 0
Available-for-sale securities, continuous unrealized loss position, 12 months or longer, accumulated loss | 0 | 0
Available-for-sale securities, continuous unrealized loss position, fair value, total | 163 | 163
Available-for-sale securities, continuous unrealized loss position, gross unrealized losses, total | (5) | (5)
Offshore funds |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale securities, continuous unrealized loss position, less than 12 months, fair value |  | 0
Available-for-sale securities, continuous unrealized loss position, less than 12 months, accumulated loss |  | 0
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 longer, accumulated loss |  | (288)
Available-for-sale securities, continuous unrealized loss position, fair value, total |  | 4,712
Available-for-sale securities, continuous unrealized loss position, gross unrealized losses, total |  | (288)
Mutual funds |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale securities, continuous unrealized loss position, less than 12 months, fair value | 982 | 3
Available-for-sale securities, continuous unrealized loss position, less than 12 months, accumulated loss | (29) | (3)
Available-for-sale securities, continuous unrealized loss position, 12 months or greater, fair value | 0 | 0
Available-for-sale securities, continuous unrealized loss position, 12 months or longer, accumulated loss | 0 | 0
Available-for-sale securities, continuous unrealized loss position, fair value, total | 982 | 3
Available-for-sale securities, continuous unrealized loss position, gross unrealized losses, total | $ (29) | $ (3)

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- Definition This item represents the aggregate fair value of investments in debt and equity securities in an unrealized loss position which are categorized neither as held-to-maturity nor trading securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 + Details
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