Available-for-sale Securities - Summary of Available-for-Sale Securities (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Jun. 30, 2012
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Cost	$ 6,468	$ 8,209
Available-for-sale securities, Gross Unrealized Gains	339	443
Available-for-sale securities, Gross Unrealized Losses	(162)	(204)
Available-for-sale securities, Fair Value	6,645	8,448
Company-sponsored mutual funds [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Cost	1,314	1,217
Available-for-sale securities, Gross Unrealized Gains	4	72
Available-for-sale securities, Gross Unrealized Losses	(99)	(156)
Available-for-sale securities, Fair Value	1,219	1,133
Epoch Global Champions separate account [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Cost	1,004	992
Available-for-sale securities, Gross Unrealized Gains	100	144
Available-for-sale securities, Gross Unrealized Losses	(9)	(48)
Available-for-sale securities, Fair Value	1,095	1,088
Epoch U.S. Equity Shareholder Yield separate account [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Cost	2,042	2,000
Available-for-sale securities, Gross Unrealized Gains	82
Available-for-sale securities, Gross Unrealized Losses	(54)
Available-for-sale securities, Fair Value	2,070	2,000
Investment in non-affiliated limited partnership [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Cost	2,108	4,000
Available-for-sale securities, Gross Unrealized Gains	153	227
Available-for-sale securities, Gross Unrealized Losses
Available-for-sale securities, Fair Value	$ 2,261	$ 4,227

Amount of equity securities categorized neither as held-to-maturity nor as trading.

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef

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Reference 9: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 10: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

- Definition

This item represents the gross unrealized gains for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities.

+ References+ Details