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Loans and Allowance for Loan Losses - Schedule of Troubled Debt Restructuring (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Financing Receivable, Modifications [Line Items]
Post-Modification Principal Balance	$ 4,859	$ 7,666
Change	(2,807)
Construction, Land Development and Other Land Loans [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Principal Balance	2,827	3,837
Change	(1,010)
Secured by 1-4 Family Residential Properties [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Principal Balance	383	1,067
Change	(684)
Secured by Non-farm, Non-residential Properties [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Principal Balance	1,533	2,418
Change	(885)
Commercial and Industrial Loans [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Principal Balance	116	344
Change	$ (228)