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Short-Term Borrowings - Additional Information (Detail) (USD $)
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12 Months Ended | |||
|---|---|---|---|---|
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2013
Minimum [Member]
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Dec. 31, 2013
Maximum [Member]
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| Short-term Debt [Line Items] | ||||
| Maturity period of federal funds | 1 day | 4 days | ||
| Federal funds purchased | $ 0 | $ 0 | ||
| Securities sold under repurchase agreements | 1,231,000 | 638,000 | ||
| Available fund lines from correspondent banks | $ 18,800,000 | |||