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Short-Term Borrowings - Additional Information (Detail) (USD $)			6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014 Minimum [Member]	Jun. 30, 2014 Maximum [Member]
Short-term Debt [Line Items]
Maturity period of federal funds			1 day	4 days
Federal funds purchased	$ 0	$ 0
Securities sold under repurchase agreements	623,000	1,231,000
Available fund lines from correspondent banks	$ 18,800,000	$ 18,800,000

Amount, after the effects of master netting arrangements, of funds outstanding borrowed in the form of a security resale agreement between the entity and another party for the purchase and resale of identical or substantially the same securities at a date certain for a specified price. Includes liabilities not subject to a master netting arrangement.

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