Securities - Amortized Cost and Fair Value of Available-for-Sale Securities by Contractual Maturity (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Jun. 30, 2012
Schedule of Available-for-sale Securities [Line Items]
Within one year, Amortized Cost	$ 995
One to five years, Amortized Cost	63,514
Five to ten years, Amortized Cost	77,717
After ten years, Amortized Cost	64
Total Amortized Cost	142,290
Amortized Cost	216,671	214,946
Within one year, Fair Value	1,005
One to five years, Fair Value	68,204
Five to ten years, Fair Value	77,601
After ten years, Fair Value	70
Total Fair Value	146,880
Fair Value	222,901	223,306
Mortgage-backed securities - GSE residential [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	74,381
Fair Value	$ 76,021

This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

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Amount of available-for-sale debt securities at fair value maturing in the sixth fiscal year through the tenth fiscal year following the latest fiscal year.

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This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized as Available-for-sale.

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