Income Taxes - Components of Net Deferred Tax Asset (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Deferred tax assets:
Loan loss reserves	$ 6,639	$ 5,048
Deferred compensation	2,967	3,019
Unrealized losses other comprehensive income	1,939	652
State franchise taxes	319	317
Other	1,432	1,899
Total deferred tax assets	13,296	10,935
Deferred tax liabilities:
Deferred state taxes	(885)	(776)
Deferred loan origination costs	(444)	(428)
Unrealized gains other comprehensive income	(255)	(875)
Depreciation	(59)	(124)
Other	0	(121)
Total deferred tax liabilities	(1,643)	(2,324)
Net deferred tax asset	$ 11,653	$ 7,959