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Employee Stock Ownership Plan (ESOP) - Summary of ESOP Shares (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified
Dec. 31, 2012
Jun. 30, 2012
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]    
Allocated shares 19,245  
Shares committed for release 9,622 19,245
Unearned shares 356,033 365,655
Total ESOP shares 384,900 384,900
Fair value of unearned ESOP shares $ 4,913 $ 4,841