Other Borrowings - Additional Information (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Short-term Debt [Line Items]
Securities sold under agreements to repurchase, average rates	0.19%	0.26%
Unused lines of credit	$ 15,000,000	$ 15,000,000
Unused lines of Credit
Short-term Debt [Line Items]
Unused lines of credit	$ 20,300,000	$ 20,300,000