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Summary of ESOP Shares (Detail) (USD $)
Sep. 30, 2012
Sep. 30, 2011
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]    
Unearned shares 32,812 37,976
Shares committed for release 1,625 1,557
Allocated shares 51,438 49,344
Total ESOP shares 85,875 88,877
Fair value of unearned shares $ 541,398 $ 503,182