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Fair Value Disclosures - Summary of Investments Measured at Fair Value on a Recurring Basis (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
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Sep. 30, 2013 | Sep. 30, 2012
Common Stock [Member] |  |
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |  |
Beginning Balance | $ 95 |
Return of capital |  |
Total gains or losses (realized/unrealized) |  |
Included in earnings (investment income) |  |
Included in other comprehensive income | 2 |
Purchases, sales, issuances, and settlements |  |
Transfers in and/or out of Level 3 |  |
Ending Balance | 97 |
Venture Capital Investments [Member] |  |
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |  |
Beginning Balance | 163 | 168
Return of capital |  |
Total gains or losses (realized/unrealized) |  |
Included in earnings (investment income) |  |
Included in other comprehensive income |  |
Purchases, sales, issuances, and settlements |  |
Transfers in and/or out of Level 3 |  |
Ending Balance | $ 163 | $ 168

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- Definition Amount of gain (loss) recognized in the income statement for financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258 + Details
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- Definition Amount of gain (loss) recognized in other comprehensive income (loss) for financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1a) -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258 + Details
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- Definition Amount of purchases, (sales), issuances and (settlements) of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph c -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258 + Details
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- Definition Amount of transfer of financial instrument classified as an asset into (out of) level 3 of the fair value hierarchy. + References No definition available. + Details
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