Deposits - Summary of Interest Expense for Each Deposit Type (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Cash and Cash Equivalents [Line Items]
Interest bearing demand	$ 485	$ 610	$ 787
Savings	254	394	792
Interest expense [Member]
Cash and Cash Equivalents [Line Items]
Interest bearing demand	224	240	184
Money market	261	370	603
Savings	254	394	792
Time, $100,000 and over	2,123	2,853	3,608
Time less than $100,000	502	844	1,304
Total interest bearing deposits	$ 3,364	$ 4,701	$ 6,491