Held-to-maturity Securities - Unrealized Holding Gains and Losses, and Fair Value of Securities Classified as Held-to-Maturity (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Jun. 30, 2012
Schedule of Held-to-maturity Securities [Line Items]
Amortized cost current	$ 702	$ 706
Amortized cost long term	510	512
Total Amortized Cost	1,212	1,218
Gross Unrecognized Gains current	1	4
Gross Unrecognized Gains long term	19	20
Gross Unrecognized Gains total	20	24
Gross Unrecognized Losses current
Gross Unrecognized Losses long term
Gross Unrecognized Losses total
Aggregate fair value	1,232	1,242
Current [Member]
Schedule of Held-to-maturity Securities [Line Items]
Aggregate fair value	703	710
Long-Term [Member]
Schedule of Held-to-maturity Securities [Line Items]
Aggregate fair value	$ 529	$ 532

Held to maturity securities net unrecognized holding gain.

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For an unclassified balance sheet, this item represents investments in debt securities which are categorized as held-to-maturity. The held-to-maturity category is for those securities that the entity has the positive intent and ability to hold until maturity.

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As of the balance sheet date, the excess of fair value over carrying value (amortized cost) of a debt security categorized as held-to-maturity, exclusive of dividend or interest income recognized but not yet received and exclusive of any write-downs for other-than-temporary impairment. Such item represents the gross unrecognized holding gain.

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As of the balance sheet date, the excess of carrying value (amortized cost) over fair value of a debt security categorized as held-to-maturity, exclusive of dividend or interest income recognized but not yet received and exclusive of any write-downs for other-than-temporary impairment. Such item represents the gross unrecognized holding loss.

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