Credit Quality - Schedule of Charged-off Troubled Debt Restructurings on Financing Receivables (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013 Contract	Dec. 31, 2012 Contract
Financing Receivable Modifications Number Of Contracts [Line Items]
Number of Contracts	1	1
Recorded Investment	$ 375	$ 375
Owner-Occupied [Member]
Financing Receivable Modifications Number Of Contracts [Line Items]
Number of Contracts	0	0
Recorded Investment	0	0
Nonowner-Occupied [Member]
Financing Receivable Modifications Number Of Contracts [Line Items]
Number of Contracts	0	0
Recorded Investment	0	0
Other Commercial [Member]
Financing Receivable Modifications Number Of Contracts [Line Items]
Number of Contracts	0	0
Recorded Investment	0	0
Residential Real Estate [Member]
Financing Receivable Modifications Number Of Contracts [Line Items]
Number of Contracts	0	0
Recorded Investment	0	0
Construction & Land Development [Member]
Financing Receivable Modifications Number Of Contracts [Line Items]
Number of Contracts	1	1
Recorded Investment	375	375
Bankcard [Member]
Financing Receivable Modifications Number Of Contracts [Line Items]
Number of Contracts	0	0
Recorded Investment	0	0
Other Consumer [Member]
Financing Receivable Modifications Number Of Contracts [Line Items]
Number of Contracts	0	0
Recorded Investment	$ 0	$ 0