Other Real Estate Owned - Summary of Changes in Other Real Estate Owned, Net of Valuation Allowance (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Real Estate [Abstract]
Balance at beginning of year	$ 3,061	$ 3,731	$ 2,288
Additions to other real estate owned	1,585	6,238	5,033
Dispositions of other real estate owned	(3,733)	(6,483)	(3,033)
Valuation adjustments in the period	0	(425)	(557)
Total	$ 913	$ 3,061	$ 3,731