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Trouble Debt Restructurings - Narrative (Detail) (USD $)
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Sep. 30, 2012
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Jun. 30, 2012
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| Financing Receivable, Modifications [Line Items] | ||
| Impaired receivables | $ 803,000 | |
| Impaired receivables, allowance for credit losses | 62,000 | |
| Loans modified as a troubled debt restructured loan within the previous 3 months and for which there was a payment default | 0 | 0 |
| Number of days past due for a troubled debt restructured loan to be categorized as default | 90 days | 90 days |
| Commitments to lend additional funds to loan customers whose terms had been modified in trouble debt restructures | $ 0 | $ 0 |