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Significant Accounting Policies - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified | 1 Months Ended | 12 Months Ended | 0 Months Ended | 12 Months Ended | 1 Months Ended | 3 Months Ended
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Jun. 30, 2014 | Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2014 Furniture and equipment [Member] Minimum [Member] | Jun. 30, 2014 Furniture and equipment [Member] Maximum [Member] | Jun. 30, 2014 Building and related improvements [Member] Minimum [Member] | Jun. 30, 2014 Building and related improvements [Member] Maximum [Member] | Jun. 01, 2014 Galileo Global Equity Advisors Inc [Member] | Jun. 30, 2014 Galileo [Member] Minimum [Member] | Jun. 30, 2014 Galileo [Member] Maximum [Member] | Jun. 30, 2014 Non-compete agreement [Member] | Mar. 31, 2014 Private and venture capital securities [Member]
Significant Of Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase of additional equity shares |  |  |  |  |  |  |  |  | 15.00% |  |  |  |
Percentage of shares issued and outstanding of Galileo |  |  |  |  |  |  |  |  | 65.00% |  |  |  |
Other Investments transferred out of Level 3 assets |  |  |  |  |  |  |  |  |  |  |  |  | $ 385
Equity method investments | 0 | 0 | 654 |  |  |  |  |  |  |  |  |  |
Depreciation Period |  |  |  |  | 3 years | 10 years | 14 years | 40 years |  | 2 years | 5 years |  |
Estimated useful life | 1 year 11 months |  |  |  |  |  |  |  |  |  |  | 2 years |
Net advertising expenditures |  | $ 615 | $ 862 | $ 1,182 |  |  |  |  |  |  |  |  |

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