Disclosures About Fair Value of Assets and Liabilities - Fair Value Measurement of Assets Recognized on Nonrecurring Basis (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Jun. 30, 2012
Fair value measurements of assets recognized on a nonrecurring basis
Impaired loans (collateral dependent)	$ 512	$ 2,438
Foreclosed assets		279
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair value measurements of assets recognized on a nonrecurring basis
Impaired loans (collateral dependent)
Foreclosed assets
Significant Other Observable Inputs (Level 2) [Member]
Fair value measurements of assets recognized on a nonrecurring basis
Impaired loans (collateral dependent)
Foreclosed assets
Significant Unobservable Inputs (Level 3) [Member]
Fair value measurements of assets recognized on a nonrecurring basis
Impaired loans (collateral dependent)	512	2,438
Foreclosed assets		$ 279