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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Fair value as of the balance sheet date of an asset representing net future revenues from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements.

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Disclosures About Fair Value of Assets and Liabilities - Fair Value Measurements of Assets Recognized on Recurring Basis (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Jun. 30, 2012
Available for sale securities:
Available for sale securities, Fair value	$ 202,914	$ 223,306
Mortgage servicing rights, Fair Value	356	329
US Government and federal agency [Member]
Available for sale securities:
Available for sale securities, Fair value	127,317	160,958
Mortgage-backed securities - GSE residential [Member]
Available for sale securities:
Available for sale securities, Fair value	71,421	58,867
State and political subdivisions [Member]
Available for sale securities:
Available for sale securities, Fair value	4,176	3,481
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Available for sale securities:
Mortgage servicing rights, Fair Value
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| US Government and federal agency [Member]
Available for sale securities:
Available for sale securities, Fair value
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Mortgage-backed securities - GSE residential [Member]
Available for sale securities:
Available for sale securities, Fair value
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| State and political subdivisions [Member]
Available for sale securities:
Available for sale securities, Fair value
Significant Other Observable Inputs (Level 2) [Member]
Available for sale securities:
Mortgage servicing rights, Fair Value
Significant Other Observable Inputs (Level 2) [Member] \| US Government and federal agency [Member]
Available for sale securities:
Available for sale securities, Fair value	127,317	160,958
Significant Other Observable Inputs (Level 2) [Member] \| Mortgage-backed securities - GSE residential [Member]
Available for sale securities:
Available for sale securities, Fair value	71,421	58,867
Significant Other Observable Inputs (Level 2) [Member] \| State and political subdivisions [Member]
Available for sale securities:
Available for sale securities, Fair value	4,176	3,481
Significant Unobservable Inputs (Level 3) [Member]
Available for sale securities:
Mortgage servicing rights, Fair Value	356	329
Significant Unobservable Inputs (Level 3) [Member] \| US Government and federal agency [Member]
Available for sale securities:
Available for sale securities, Fair value
Significant Unobservable Inputs (Level 3) [Member] \| Mortgage-backed securities - GSE residential [Member]
Available for sale securities:
Available for sale securities, Fair value
Significant Unobservable Inputs (Level 3) [Member] \| State and political subdivisions [Member]
Available for sale securities:
Available for sale securities, Fair value